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Hudson Alves Pinto - One of the best experts on this subject based on the ideXlab platform.

  • Biologia e taxonomia de trematódeos transmitidos por moluscos dulciaquícolas na represa da Pampulha, Belo Horizonte, Minas Gerais, Brasil
    Universidade Federal de Minas Gerais, 2013
    Co-Authors: Hudson Alves Pinto
    Abstract:

    Visando ampliar o conhecimento sobre os ciclos biológicos de trematódeos no Brasil, coletas malacológicas foram realizadas na represa da Pampulha, Belo Horizonte, Minas Gerais, entre janeiro de 2009 e novembro de 2012. As cercárias obtidas foram utilizadas para a realização de infecções experimentais e os estágios de desenvolvimento obtidos submetidos à análise morfológica visando à identificação taxonômica. Foram examinados 32.576 exemplares de moluscos pertencentes a oito espécies (Biomphalaria glabrata, Biomphalaria straminea, Biomphalaria tenagophila, Lymnaea columella, Melanoides tuberculata, Physa acuta, Physa marmorata e Pomacea sp.), dos quais 3073 (9,43%) apresentaram-se infectados por larvas de 22 espécies de trematódeos. Variações estacionais na riqueza de espécies e nos percentuais de infecção de moluscos por estes parasitos foram observadas, com maiores valores verificados nas estações secas. Biomphalaria straminea foi encontrada albergando larvas de Apharyngostrigea sp. 1, Apharyngostrigea sp. 2, Austrodiplostomum compactum, Cercaria macrogranulosa, Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, Hysteromorpha triloba, Notocotylidae gen. sp., Paryphostomum segregatum, Petasiger sp., Ribeiroia sp., Schistosomatidae gen. sp. 1 e Spirorchiidae gen. sp. Biomphalaria glabrata apresentou-se infectada por larvas de A. compactum, Clinostomum sp., P. segregatum, Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, Ribeiroia sp., Spirorchiidae gen. sp. e Schistosoma mansoni. Cercárias de Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2 e Spirorchiidae gen. sp. emergiram também de Biomphalaria tenagophila. Entre os moluscos prosobrânquios, larvas de Centrocestus formosanus, Philophthalmus gralli e Renicola sp. foram encontradas em M. tuberculata, enquanto xifidiocercária e Schistosomatidae gen. sp. 2 em Pomacea sp. Cercárias de Echinostoma exile e Haematoloechidae gen. sp. foram observadas respectivamente em P. marmorata e L. columella. Além dos moluscos, possíveis segundos hospedeiros intermediários foram avaliados quanto a infecção natural por trematódeos. Entre peixes, exemplares de Poecilia reticulata foram encontrados infectados por metacercárias de Apharyngostrigea sp., C. formosanus, Clinostomum sp., Posthodiplostomum nanum e Renicola sp.; Australoheros facetus por C. formosanus; Oreochromis niloticus por A. compactum, C. formosanus, Echinostomatidae gen. sp. 1 e Ribeiroia sp.; Geophagus brasiliensis por Clinostomum heluans. Larvas de Odonata (Orthemis discolor e Perithemis mooma) foram encontradas albergando metacercárias de Eumegacetes medioximus. Além disso, um exemplar de socozinho, Butorides striata, encontrado na localidade apresentou-se infectado por Ascocotyle (Phagicola) angrense, Ascocotyle (Phagicola) pindoramensis, C. formosanus, C. heluans, C. marginatum, E. medioximus, P. nanum e Prosthogonimus ovatus. Novos registros da interação entre moluscos e trematódeos foram realizados para o Brasil e aspectos do ciclo biológico de algumas espécies destes parasitos foram elucidados.With the aim to increasing the knowledge about the life cycles of trematodes from Brazil, malacological surveys were carried out at Pampulha reservoir, Belo Horizonte, Minas Gerais, between January 2009 and November 2012. Cercariae were used to perform experimental infection studies and the developmental stages obtained were submitted to morphological analyses in order to taxonomic identification. A total of 32,576 specimens of snail from eight species (Biomphalaria glabrata, Biomphalaria straminea, Biomphalaria tenagophila, Lymnaea columella, Melanoides tuberculata, Physa acuta, Physa marmorata, Pomacea sp.) were examined, and 3,073 (9.43%) were found infected with larvae of 22 species of trematodes. Seasonal variation in species richness and percentage of infection by trematodes were observed, with higher values verified in dry seasons. Biomphalaria straminea was found harboring larvae of Apharyngostrigea sp. 1, Apharyngostrigea sp. 2, Austrodiplostomum compactum, Cercaria macrogranulosa, Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, Hysteromorpha triloba, Notocotylidae gen. sp., Paryphostomum segregatum, Petasiger sp., Ribeiroia sp., Schistosomatidae gen. sp., and Spirorchiidae gen. sp. 1. Biomphalaria glabrata was found infected with A. compactum, Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, P. segregatum, Ribeiroia sp., Spirorchiidae gen. sp., and Schistosoma mansoni. Cercariae of Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, and Spirorchiidae gen. sp emerged also from Biomphalaria tenagophila. Among the prosobranch mollusks, larvae of Centrocestus formosanus, Philophthalmus gralli and Renicola sp. emerged from Melanoides tuberculata, while xiphidiocercariae and Schistosomatidae gen. sp. 2 from Pomacea sp. Larvae of Echinostoma exile and Haematoloechidae gen. sp were found in P. marmorata and L. columella, respectively. In addition to the mollusks, potential second intermediate hosts were evaluated for natural infection with trematodes. Among fish, specimens of Poecilia reticulata were found infected with metacercariae of Apharyngostrigea sp., C. formosanus, Clinostomum sp., Posthodiplostomum nanum and Renicola sp.; Australoheros facetus with C. formosanus; Oreochromis niloticus with A. compactum, C. formosanus, Echinostomatidae gen. sp. and Ribeiroia sp.; Geophagus brasiliensis with Clinostomum heluans. Larval odonates (Orthemis discolor and Perithemis mooma) were found harboring metacercariae of Eumegacetes medioximus. In addition, a specimen of Striated Heron, Butorides striata, from the locality was found infected with Ascocotyle (Phagicola) angrense, Ascocotyle (Phagicola) pindoramensis, C. formosanus, C. heluans, C. marginatum, E. medioximus, P. nanum, and Prosthogonimus ovatus. New reports of the interaction between snails and trematodes were presented for the first time in Brazil and aspects of the life cycle of some of these parasites were elucidated

  • Biologia e taxonomia de trematódeos transmitidos por moluscos dulciaquícolas na represa da Pampulha, Belo Horizonte, Minas Gerais, Brasil
    'Revista da Faculdade de Direito da UFMG', 2013
    Co-Authors: Hudson Alves Pinto
    Abstract:

    Exportado OPUSMade available in DSpace on 2019-08-14T03:01:09Z (GMT). No. of bitstreams: 1 tese_de_doutorado_hudson_a_pinto_2013.pdf: 19525546 bytes, checksum: 552fca69c9c1486925abb742e946e79c (MD5) Previous issue date: 16Visando ampliar o conhecimento sobre os ciclos biológicos de trematódeos no Brasil, coletas malacológicas foram realizadas na represa da Pampulha, Belo Horizonte, Minas Gerais, entre janeiro de 2009 e novembro de 2012. As cercárias obtidas foram utilizadas para a realização de infecções experimentais e os estágios de desenvolvimento obtidos submetidos à análise morfológica visando à identificação taxonômica. Foram examinados 32.576 exemplares de moluscos pertencentes a oito espécies (Biomphalaria glabrata, Biomphalaria straminea, Biomphalaria tenagophila, Lymnaea columella, Melanoides tuberculata, Physa acuta, Physa marmorata e Pomacea sp.), dos quais 3073 (9,43%) apresentaram-se infectados por larvas de 22 espécies de trematódeos. Variações estacionais na riqueza de espécies e nos percentuais de infecção de moluscos por estes parasitos foram observadas, com maiores valores verificados nas estações secas. Biomphalaria straminea foi encontrada albergando larvas de Apharyngostrigea sp. 1, Apharyngostrigea sp. 2, Austrodiplostomum compactum, Cercaria macrogranulosa, Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, Hysteromorpha triloba, Notocotylidae gen. sp., Paryphostomum segregatum, Petasiger sp., Ribeiroia sp., Schistosomatidae gen. sp. 1 e Spirorchiidae gen. sp. Biomphalaria glabrata apresentou-se infectada por larvas de A. compactum, Clinostomum sp., P. segregatum, Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, Ribeiroia sp., Spirorchiidae gen. sp. e Schistosoma mansoni. Cercárias de Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2 e Spirorchiidae gen. sp. emergiram também de Biomphalaria tenagophila. Entre os moluscos prosobrânquios, larvas de Centrocestus formosanus, Philophthalmus gralli e Renicola sp. foram encontradas em M. tuberculata, enquanto xifidiocercária e Schistosomatidae gen. sp. 2 em Pomacea sp. Cercárias de Echinostoma exile e Haematoloechidae gen. sp. foram observadas respectivamente em P. marmorata e L. columella. Além dos moluscos, possíveis segundos hospedeiros intermediários foram avaliados quanto a infecção natural por trematódeos. Entre peixes, exemplares de Poecilia reticulata foram encontrados infectados por metacercárias de Apharyngostrigea sp., C. formosanus, Clinostomum sp., Posthodiplostomum nanum e Renicola sp.; Australoheros facetus por C. formosanus; Oreochromis niloticus por A. compactum, C. formosanus, Echinostomatidae gen. sp. 1 e Ribeiroia sp.; Geophagus brasiliensis por Clinostomum heluans. Larvas de Odonata (Orthemis discolor e Perithemis mooma) foram encontradas albergando metacercárias de Eumegacetes medioximus. Além disso, um exemplar de socozinho, Butorides striata, encontrado na localidade apresentou-se infectado por Ascocotyle (Phagicola) angrense, Ascocotyle (Phagicola) pindoramensis, C. formosanus, C. heluans, C. marginatum, E. medioximus, P. nanum e Prosthogonimus ovatus. Novos registros da interação entre moluscos e trematódeos foram realizados para o Brasil e aspectos do ciclo biológico de algumas espécies destes parasitos foram elucidados.With the aim to increasing the knowledge about the life cycles of trematodes from Brazil, malacological surveys were carried out at Pampulha reservoir, Belo Horizonte, Minas Gerais, between January 2009 and November 2012. Cercariae were used to perform experimental infection studies and the developmental stages obtained were submitted to morphological analyses in order to taxonomic identification. A total of 32,576 specimens of snail from eight species (Biomphalaria glabrata, Biomphalaria straminea, Biomphalaria tenagophila, Lymnaea columella, Melanoides tuberculata, Physa acuta, Physa marmorata, Pomacea sp.) were examined, and 3,073 (9.43%) were found infected with larvae of 22 species of trematodes. Seasonal variation in species richness and percentage of infection by trematodes were observed, with higher values verified in dry seasons. Biomphalaria straminea was found harboring larvae of Apharyngostrigea sp. 1, Apharyngostrigea sp. 2, Austrodiplostomum compactum, Cercaria macrogranulosa, Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, Hysteromorpha triloba, Notocotylidae gen. sp., Paryphostomum segregatum, Petasiger sp., Ribeiroia sp., Schistosomatidae gen. sp., and Spirorchiidae gen. sp. 1. Biomphalaria glabrata was found infected with A. compactum, Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, P. segregatum, Ribeiroia sp., Spirorchiidae gen. sp., and Schistosoma mansoni. Cercariae of Clinostomum sp., Echinostomatidae gen. sp. 1, Echinostomatidae gen. sp. 2, and Spirorchiidae gen. sp emerged also from Biomphalaria tenagophila. Among the prosobranch mollusks, larvae of Centrocestus formosanus, Philophthalmus gralli and Renicola sp. emerged from Melanoides tuberculata, while xiphidiocercariae and Schistosomatidae gen. sp. 2 from Pomacea sp. Larvae of Echinostoma exile and Haematoloechidae gen. sp were found in P. marmorata and L. columella, respectively. In addition to the mollusks, potential second intermediate hosts were evaluated for natural infection with trematodes. Among fish, specimens of Poecilia reticulata were found infected with metacercariae of Apharyngostrigea sp., C. formosanus, Clinostomum sp., Posthodiplostomum nanum and Renicola sp.; Australoheros facetus with C. formosanus; Oreochromis niloticus with A. compactum, C. formosanus, Echinostomatidae gen. sp. and Ribeiroia sp.; Geophagus brasiliensis with Clinostomum heluans. Larval odonates (Orthemis discolor and Perithemis mooma) were found harboring metacercariae of Eumegacetes medioximus. In addition, a specimen of Striated Heron, Butorides striata, from the locality was found infected with Ascocotyle (Phagicola) angrense, Ascocotyle (Phagicola) pindoramensis, C. formosanus, C. heluans, C. marginatum, E. medioximus, P. nanum, and Prosthogonimus ovatus. New reports of the interaction between snails and trematodes were presented for the first time in Brazil and aspects of the life cycle of some of these parasites were elucidated

  • Melanoides tuberculata as intermediate host of Philophthalmus gralli in Brazil
    Revista do Instituto de Medicina Tropical de Sao Paulo, 2010
    Co-Authors: Hudson Alves Pinto, Alan Lane De Melo
    Abstract:

    Melanoides tuberculata that naturally harbored trematode larvae were collected at the Pampulha dam, Belo Horizonte (Minas Gerais, Brazil), during malacological surveys conducted from 2006 to 2010. From 7,164 specimens of M. tuberculata collected, 25 (0.35%) were infected by cercariae, which have been morphologically characterized as belonging to the Megalurous group, genus Philophthalmus. Excysted metacercariae were used for successful experimental infection of Gallus gallus domesticus, and adult parasites recovered from the nictitating membranes of chickens were identified as Philophthalmus gralli. This is the first report of P. gralli in M. tuberculata in Brazil.

  • Infecção natural de Melanoides tuberculata (Mollusca: Thiaridae) por Centrocestus formosanus (trematoda: Heterophyidae) e por Philophthalmus gralli (Trematoda: Philophthalmidae) no Brasil
    Universidade Federal de Minas Gerais, 2009
    Co-Authors: Hudson Alves Pinto
    Abstract:

    Visando avaliar aspectos biológicos e taxonômicos de trematódeos transmitidos por Melanoides tuberculata (Müller, 1774) no Brasil, coletas malacológicas foram realizadas na represa da Pampulha, Belo Horizonte, Minas Gerais, no período entre março de 2006 a julho de 2009. De 38344 exemplares de M. tuberculata coletados e examinados, 279215 (7,36%) apresentaram-se infectados por larvas de trematódeos que, após caracterização morfológica preliminar, foram utilizadas para estudos biológicos experimentais. Estágios evolutivos obtidos (cercárias, metacercárias, rédias, parasitos adultos, ovos e/ou miracídios) foram estudados in vivoa fresco e após processo de fixação, coloração e montagem de lâminas permanentes, seguida de análise morfológica e morfométrica em microscópio de luz. Cercárias do tipo Pleurolofocerca foram encontradas em 206 268 (7,03%) exemplares de M. tuberculata e utilizadas para a infecção de Poecilia reticulata Peters, 1859. Metacercárias obtidas nas brânquias dos peixes 30 dias após a infecção foram inoculadas por via oral a Mus musculus (Linnaeus, 1758) da linhagem AKR/J e parasitos adultos recuperados no intestino delgado dos camundongos 30 dias após infecção DPI foram identificados como Centrocestus formosanus (Nishigori, 1924). Outro tipo cercariano, do grupo Megalura, foi encontrado em 11 (0,33%) exemplares de M. tuberculata coletadoslarvas do . Estas larvas formaram metacercárias em substrato sólido que foram utilizadas para a infecção de Gallus gallus domesticus (Linnaeus, 1758) jovens. Parasitos adultos obtidos da membrana nictitante e saco conjuntival das aves, 30 dias após infecção, foram identificados como Philophthalmus gralli Mathis & Leger, 1910. Este é o primeiro registro de ambas as espécies de trematódeos em M. tuberculata no Brasil

  • infeccao natural de melanoides tuberculata mollusca thiaridae por centrocestus formosanus trematoda heterophyidae e por Philophthalmus gralli trematoda philophthalmidae no brasil
    2009
    Co-Authors: Hudson Alves Pinto
    Abstract:

    Exportado OPUS%%%%Made available in DSpace on 2019-08-10T20:26:57Z (GMT). No. of bitstreams: 1 disserta__o_hudson_alves_pinto.pdf: 2368539 bytes, checksum: 391d43d1f140ec19821c05d74cb00f5a (MD5) Previous issue date: 20%%%%Visando avaliar aspectos biologicos e taxonomicos de trematodeos transmitidos por Melanoides tuberculata (Muller, 1774) no Brasil, coletas malacologicas foram realizadas na represa da Pampulha, Belo Horizonte, Minas Gerais, no periodo entre marco de 2006 a julho de 2009. De 38344 exemplares de M. tuberculata coletados e examinados, 279215 (7,36%) apresentaram-se infectados por larvas de trematodeos que, apos caracterizacao morfologica preliminar, foram utilizadas para estudos biologicos experimentais. Estagios evolutivos obtidos (cercarias, metacercarias, redias, parasitos adultos, ovos e/ou miracidios) foram estudados in vivoa fresco e apos processo de fixacao, coloracao e montagem de lâminas permanentes, seguida de analise morfologica e morfometrica em microscopio de luz. Cercarias do tipo Pleurolofocerca foram encontradas em 206 268 (7,03%) exemplares de M. tuberculata e utilizadas para a infeccao de Poecilia reticulata Peters, 1859. Metacercarias obtidas nas brânquias dos peixes 30 dias apos a infeccao foram inoculadas por via oral a Mus musculus (Linnaeus, 1758) da linhagem AKR/J e parasitos adultos recuperados no intestino delgado dos camundongos 30 dias apos infeccao DPI foram identificados como Centrocestus formosanus (Nishigori, 1924). Outro tipo cercariano, do grupo Megalura, foi encontrado em 11 (0,33%) exemplares de M. tuberculata coletadoslarvas do . Estas larvas formaram metacercarias em substrato solido que foram utilizadas para a infeccao de Gallus gallus domesticus (Linnaeus, 1758) jovens. Parasitos adultos obtidos da membrana nictitante e saco conjuntival das aves, 30 dias apos infeccao, foram identificados como Philophthalmus gralli Mathis & Leger, 1910. Este e o primeiro registro de ambas as especies de trematodeos em M. tuberculata no Brasil.

Robert Poulin - One of the best experts on this subject based on the ideXlab platform.

  • save your host save yourself caste ratio adjustment in a parasite with division of labor and snail host survival following shell damage
    Ecology and Evolution, 2018
    Co-Authors: Colin D Macleod, Robert Poulin, Clement Lagrue
    Abstract:

    : Shell damage and parasitic infections are frequent in gastropods, influencing key snail host life-history traits such as survival, growth, and reproduction. However, their interactions and potential effects on hosts and parasites have never been tested. Host-parasite interactions are particularly interesting in the context of the recently discovered division of labor in trematodes infecting marine snails. Some species have colonies consisting of two different castes present at varying ratios; reproductive members and nonreproductive soldiers specialized in defending the colony. We assessed snail host survival, growth, and shell regeneration in interaction with infections by two trematode species, Philophthalmus sp. and Maritrema novaezealandense, following damage to the shell in the New Zealand mud snail Zeacumantus subcarinatus. We concomitantly assessed caste-ratio adjustment between nonreproductive soldiers and reproductive members in colonies of the trematode Philophthalmus sp. in response to interspecific competition and shell damage to its snail host. Shell damage, but not parasitic infection, significantly increased snail mortality, likely due to secondary infections by pathogens. However, trematode infection and shell damage did not negatively affect shell regeneration or growth in Z. subcarinatus; infected snails actually produced more new shell than their uninfected counterparts. Both interspecific competition and shell damage to the snail host induced caste-ratio adjustment in Philophthalmus sp. colonies. The proportion of nonreproductive soldiers increased in response to interspecific competition and host shell damage, likely to defend the parasite colony and potentially the snail host against increasing threats. These results indicate that secondary infections by pathogens following shell damage to snails both significantly increased snail mortality and induced caste-ratio adjustments in parasites. This is the first evidence that parasites with a division of labor may be able to produce nonreproductive soldiers according to environmental factors other than interspecific competition with other parasites.

  • parasite induced behavioural changes to the trade off between foraging and predator evasion in a marine snail
    Journal of Experimental Marine Biology and Ecology, 2012
    Co-Authors: Tsukushi Kamiya, Robert Poulin
    Abstract:

    Abstract Trophic interactions in ecological communities not only affect consumer-resource densities, but also induce phenotypic responses that can ripple through a food web to influence prey resources, competitors and other predators (i.e. trait-mediated interactions). Predators affect short-term trade-off decisions in prey species through behavioural alterations, yet the role of parasites in the context of trait-mediated interactions is rarely discussed, despite our extensive knowledge of parasite-induced behavioural alterations. Adding parasites to the picture, the foraging–predation trade-off presents an interesting case where the effects of predator- and parasite-induced behavioural responses occur in conjunction. Empirical studies on the effect of parasites on trait-mediated anti-predator responses are still scarce, especially in marine systems. Our experiments used marine mud snails, Zeacumantus subcarinatus (Batillariidae), infected with the trematode parasites Maritrema novaezealandensis and Philophthalmus sp. to investigate the effects of trematode-induced behavioural alterations on the trade-off between food acquisition and predator avoidance in the presence of a range of predation cues. We found that the time taken to initiate anti-predator responses was overall significantly shorter in M. novaezealandensis -infected snails than in uninfected snails, while it was significantly longer for Philophthalmus -infected snails. In the simultaneous presence of odours from an injured conspecific and a crab predator, however, the reaction time between uninfected and M. novaezealandensis -infected snails did not differ while Philophthalmus -infected snails were still markedly slower than the former groups. Our results demonstrate species-specific parasite-induced behavioural changes in the presence of imminent predation risk. However, effects of the trematodes on overall feeding and fleeing times were not detected in our experiments; thus, the net effect of parasitism on the foraging–predation trade-off remains unknown.

  • fitness benefits of a division of labour in parasitic trematode colonies with and without competition
    International Journal for Parasitology, 2012
    Co-Authors: Melanie M Lloyd, Robert Poulin
    Abstract:

    Abstract A reproductive division of labour has recently been discovered within polyembryonic colonies of two species of parasitic trematodes infecting snail hosts. In these colonies, one morph expands the colony through asexual reproduction while the other morph never reproduces. As in other polyembryonic species using a division of labour (parasitoid wasps, one species of sea anemone), the non-reproducing morph appears specialized for defense against competing colonies. In this study, we first assessed competition between Philophthalmus sp. (which possesses reproducing and non-reproducing morphs) and the most common co-infecting species, Maritrema novaezealandensis, by quantifying colony success within snail hosts. Colonies of either species that did not compete within their host were more successful (i.e., produced more transmission stages) than colonies that were competing in a shared host. Second, we cultured individuals of both species in vitro, alone or together, to study the interaction more closely and to measure any advantage obtained by the colony from the non-reproducing morphs. This was done by manipulating the presence and abundance of M. novaezealandensis as well as the presence of the non-reproducing ‘defensive’ morph. Philophthalmus sp. colonies with both reproducing and non-reproducing morphs but without M. novaezealandensis were most successful. This implies the non-reproducing morphs provide a fitness benefit to Philophthalmus sp. colonies even in the absence of competition, although the nature of this advantage remains unclear.

  • substratum preference of Philophthalmus sp cercariae for cyst formation under natural and experimental conditions
    Journal of Parasitology, 2012
    Co-Authors: Allison T Neal, Robert Poulin
    Abstract:

    Abstract: Selection on parasites should favor adaptations that maximize the probability of transmission to the definitive host, such as the preference for and use of intermediate hosts or encystment substrata that are likely to be consumed by the definitive host. Eye flukes in the genus Philophthalmus are passed to their definitive avian host through the ingestion of metacercariae encysted on hard substrata. The life cycle of these parasites is generally well understood; however, there is almost no information on substratum use or preference of the cercariae of these parasites. In this study, we combine a survey of naturally occurring substrata with experimental, laboratory-based choice tests to determine the preferred substratum of Philophthalmus sp. and whether this preference is affected by the presence and density of pre-existing cysts. A concordance between natural and experimental data show a preference for the shells of multiple species of snail over other hard substrata that are common at the fiel...

  • in vitro culture of marine trematodes from their snail first intermediate host
    Experimental Parasitology, 2011
    Co-Authors: Melanie M Lloyd, Robert Poulin
    Abstract:

    The ability to culture parasites outside their host (i.e. in vitro) is essential for several aspects of parasitological research. Here, a culture medium for marine trematode parthenitae was optimized using Philophthalmus sp. rediae from the intermediate snail host, Zeacumantus subcarinatus. The medium was optimized by sequentially testing the suitability of different levels of osmolality, different commercially available media, and different concentrations of supplemented chicken serum, while controlling for genetic variation among cultures. Philophthalmus sp. rediae survived up to 56 days in cultures of the best tested medium, remaining active and continuously shedding cercariae. The broader suitability of the culture medium was tested using five other trematode species from different families (using either the same or other marine snails as first intermediate hosts): Galactosomum sp., Acanthoparyphium sp., Maritrema novaezealandensis, Curtuteria australis, and an undescribed species of the family Opecoelidae. Survivorship of rediae and sporocysts from these species ranged from eight days to 42 days. The culture procedures developed here can therefore be used in the future as a system under which to culture marine trematode parthenitae for experimental studies.

Gomes,delir Corrêa - One of the best experts on this subject based on the ideXlab platform.

  • Pathology and first report of natural infections of the eye trematode Philophthalmus lachrymosus Braun, 1902 (Digenea, Philophthalmidae) in a non-human mammalian host
    Instituto Oswaldo Cruz Ministério da Saúde, 2005
    Co-Authors: Pinto,roberto Magalhães, Wanderlei De Moraes, Santos,leonilda Correia Dos, Menezes,rodrigo Caldas, Juvenal,julio Cesar, Gomes,delir Corrêa
    Abstract:

    The avian eye trematode Philophthalmus lachrymosus Braun, 1902 is for the first time referred naturally occurring in a non-human mammalian host. Previously, natural infections with P. lachrymosus and other species of Philophthalmus have been occasionally reported from man, with few data on experimental infections of non-human mammals. Results presented here are related to the report of two cases of philophthalmosis due to natural infections of wild Brazilian capybaras, Hydrochaeris hydrochaeris L., 1766 with P. lachrymosus and associated pathology. Clinical signs, gross and microscopic lesions as well as new morphometric data on the parasite are presented

  • Pathology and first report of natural infections of the eye trematode Philophthalmus lachrymosus Braun, 1902 (Digenea, Philophthalmidae) in a non-human mammalian host
    'FapUNIFESP (SciELO)', 2005
    Co-Authors: Pinto,roberto Magalhães, Wanderlei De Moraes, Santos,leonilda Correia Dos, Menezes,rodrigo Caldas, Juvenal,julio Cesar, Tortelly Rogerio, Gomes,delir Corrêa
    Abstract:

    Submitted by Sandra Infurna (sandra.infurna@ioc.fiocruz.br) on 2019-10-17T14:12:27Z No. of bitstreams: 1 RobertoMagalhaes_DelirGomes_etal_IOC_2005.pdf: 1450105 bytes, checksum: 9ab71befa01eeebc6d2c74811df52bad (MD5)Approved for entry into archive by Sandra Infurna (sandra.infurna@ioc.fiocruz.br) on 2019-10-17T14:20:18Z (GMT) No. of bitstreams: 1 RobertoMagalhaes_DelirGomes_etal_IOC_2005.pdf: 1450105 bytes, checksum: 9ab71befa01eeebc6d2c74811df52bad (MD5)Made available in DSpace on 2019-10-17T14:20:18Z (GMT). No. of bitstreams: 1 RobertoMagalhaes_DelirGomes_etal_IOC_2005.pdf: 1450105 bytes, checksum: 9ab71befa01eeebc6d2c74811df52bad (MD5) Previous issue date: 2005Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Helmintologia. Laboratório de Helmintos Parasitos de Vertebrados. Rio de Janeiro, RJ, Brasil.Itaipu Binacional. Superintendência de Meio Ambiente. Foz do Iguaçu, PR, Brasil.Universidade Federal Fluminense. Faculdade de Veterinária. Departamento de Patologia. Niterói, RJ, Brasil.Fundação Oswaldo Cruz. Centro de Criação de Animais de Laboratório. Rio de Janeiro, RJ, Brasil.Itaipu Binacional. Superintendência de Meio Ambiente. Foz do Iguaçu, PR, Brasil.Pontifícia Universidade Católica. Pós-Graduação em Clínica Médico-Cirúrgica em Animais Silvestres. São José dos Pinhais, PR, Brasil.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Helmintologia. Laboratório de Helmintos Parasitos de Vertebrados. Rio de Janeiro, RJ, Brasil.The avian eye trematode Philophthalmus lachrymosus Braun, 1902 is for the first time referred naturally occurring in a non-human mammalian host. Previously, natural infections with P. lachrymosus and other species of Philophthalmus have been occasionally reported from man, with few data on experimental infections of non-human mammals. Results presented here are related to the report of two cases of philophthalmosis due to natural infections of wild Brazilian capybaras, Hydrochaeris hydrochaeris L., 1766 with P. lachrymosus and associated pathology. Clinical signs, gross and microscopic lesions as well as new morphometric data on the parasite are presented

Elizabeth Matenga - One of the best experts on this subject based on the ideXlab platform.

  • first report of an outbreak of the oriental eye fluke Philophthalmus gralli mathis leger 1910 in commercially reared ostriches struthio camelus in zimbabwe
    Onderstepoort Journal of Veterinary Research, 2005
    Co-Authors: Samson Mukaratirwa, T Hove, Z M Cindzi, D B Maononga, M Taruvinga, Elizabeth Matenga
    Abstract:

    A total of 17 commercially reared ostriches (Struthio camelus) from Msengi farm, Chinhoyi, Zimbabwe, observed with swollen eyes, severe conjunctivitis and constant lacrimation accompanied by a purulent exudate, were restrained for further clinical examination. Some of the birds were semi-blind with severe loss of body condition. When examined, tiny organisms were observed attached to the nictitating membranes and the conjuctival sacs of both eyes. The organisms were identified as Philophthalmus gralli , the "oriental eye-fluke" and Melanoides tuberculata , a prosobranch snail, was confirmed as the intermediate host through natural and experimental infection. To the best of our knowledge this is the first record of the oriental eye-fluke infection in birds in Zimbabwe and Africa and extends its known geographical range.

  • First report of an outbreak of the oriental eye-fluke, Philophthalmus gralli (Mathis & Leger 1910), in commercially reared ostriches (Struthio camelus) in Zimbabwe
    AOSIS, 2005
    Co-Authors: Samson Mukaratirwa, T Hove, Z M Cindzi, D B Maononga, M Taruvinga, Elizabeth Matenga
    Abstract:

    A total of 17 commercially reared ostriches (Struthio camelus) from Msengi farm, Chinhoyi, Zimbabwe, observed with swollen eyes, severe conjunctivitis and constant lacrimation accompanied by a purulent exudate, were restrained for further clinical examination. Some of the birds were semi-blind with severe loss of body condition. When examined, tiny organisms were observed attached to the nictitating membranes and the conjuctival sacs of both eyes. The organisms were identified as Philophthalmus gralli, the "oriental eye-fluke" and Melanoides tuberculata, a prosobranch snail, was confirmed as the intermediate host through natural and experimental infection. To the best of our knowledge this is the first record of the oriental eye-fluke infection in birds in Zimbabwe and Africa and extends its known geographical range

R G Cooper - One of the best experts on this subject based on the ideXlab platform.

  • bacterial fungal and parasitic infections in the ostrich struthio camelus var domesticus
    Animal Science Journal, 2005
    Co-Authors: R G Cooper
    Abstract:

    The ostrich is susceptible to microorganisms of bacterial, fungal and parasitic origin. Anthrax, caused by Bacillus anthracis, is dangerous to other livestock and humans. Salmonella is transmitted from rodents or wild bird reservoirs. Pausterellosis caused by Pasteurella multocida results in air sac infections in ostriches. Colibacillosis is caused by Escherichia coli. Tuberculosis caused by Mycobacterium avium, is very rare in ostriches. Aspergillosis principally afflicts chicks. Zygomycosis, a secondary fungal infection of the upper gastrointestinal tract, is caused by Basidia, Mucor and Rhizopus. Leucocytozoon struthionis and Plasmodium spp. are harmless protozoa transmitted from flying arthropods. The tapeworm, Houttuynia struthionis, is dangerous in young ostriches. The adult ratite fluke (Philophthalmus gralli) is transmitted to ostriches following ingestion of infected freshwater crustaceans. Tick infestations of ostrich skin in Africa include Amblyomma spp., Haemaphysalis punctata, Hyalomma spp., Rhipicephalus turanicus and Argus spp. The ostrich quillmite (Pterolichus bicaudatus) and louse (Struthioliperus struthionus) may lower skin and leather quality via pruritis and/or excessive preening and feather loss. Nemododa infections are rare.