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Raquel Pires De Araujo - One of the best experts on this subject based on the ideXlab platform.

  • Thermal requirements of Dermanyssus gallinae (De Geer, 1778) (Acari: Dermanyssidae)
    Colégio Brasileiro de Parasitologia Veterinária, 2015
    Co-Authors: Tucci, Edna Clara, Angelo Do P. Prado, Raquel Pires De Araujo
    Abstract:

    The thermal requirements for development of Dermanyssus gallinae were studied under laboratory conditions at 15, 20, 25, 30 and 35°C, a 12h photoperiod and 60-85% RH. The thermal requirements for D. gallinae were as follows. Preoviposition: base temperature 3.4ºC, thermal constant (k) 562.85 degree-hours, determination coefficient (R²) 0.59, regression equation: Y= -0.006035 + 0.001777 x. Egg: base temperature 10.60ºC, thermal constant (k) 689.65 degree-hours, determination coefficient (R²) 0.94, regression equation: Y= -0.015367 + 0.001450 x. Larva: base temperature 9.82ºC, thermal constant (k) 464.91 degree-hours, determination coefficient R² 0.87, regression equation: Y= -0.021123+0.002151 x. Protonymph: base temperature 10.17ºC, thermal constant (k) 504.49 degree-hours, determination coefficient (R²) 0.90, regression equation: Y= -0.020152 + 0.001982 x. Deutonymph: base temperature 11.80ºC, thermal constant (k) 501.11 degree-hours, determination coefficient (R²) 0.99, regression equation: Y= -0.023555 + 0.001996 x. The results obtained showed that 15 to 42 generations of Dermanyssus gallinae may occur during the year in the State of São Paulo, as estimated based on isotherm charts. Dermanyssus gallinae may develop continually in the State of São Paulo, with a population decrease in the winter. There were differences between the developmental stages of D. gallinae in relation to thermal requirements.Experimentos de laboratório foram realizados visando estimar as exigências térmicas de Dermanyssus gallinae. Para isso, o desenvolvimento do ácaro foi estudado em condições de laboratório usando-se câmaras climatizadas reguladas a 15, 20, 25, 30 e 35°C, fotofase de 12h e UR de 6085%. As exigências térmicas determinadas para D. gallinae foram: Pré-oviposição: temperatura base de 3,4 ºC, constante térmica (k) igual a 562,85 graus-hora, coeficiente de determinação (R²) igual a 0,59, equação de regressão: Y= -0,006035 + 0,001777 x. Ovo. Temperatura base de 10,60 ºC, constante térmica (k) igual a 689,65 graus-hora, coeficiente de determinação (R²) igual a 0,94, equação de regressão: Y= -0,015367 + 0,001450 x. Larva. Temperatura base 9,82 ºC, constante térmica (k) igual a 464,91 graus-hora, R² igual a 0,87, equação de regressão: Y= -0,021123+0,002151x. Protoninfa. Temperatura de 10,17 ºC, constante térmica (k) igual a 504,49 graus-hora, coeficiente de determinação (R²) igual a 0,90, equação de regressão: Y= -0,020152 + 0,001982 x. Deutoninfa. Temperatura de 11,80 ºC, constante (k) térmica igual a 501,11 graus-hora, coeficiente de determinação (R²) igual a 0,99, equação de regressão: Y= -0,023555 + 0,001996 x. Os resultados obtidos permitem concluir que no Estado de São Paulo podem ocorrem de 15 a 42 gerações/ano de D. gallinae, em estimativa baseada em isotermas. Dermanyssus gallinae pode se desenvolver continuamente no Estado de São Paulo, com diminuição da população no inverno. Existem diferenças entre os estágios de desenvolvimento de D. gallinae com relação às exigências térmicas.677

  • development of Dermanyssus gallinae acari dermanyssidae at different temperatures
    Veterinary Parasitology, 2008
    Co-Authors: Edna Clara Tucci, Angelo Pires Do Prado, Raquel Pires De Araujo
    Abstract:

    Abstract The development, viability, and life cycle parameters of Dermanyssus gallinae at five different temperatures (15, 20, 25, 30 and 35 °C), and at relative humidity 70–85% were evaluated. Life cycle duration was 690.75 h (28 days) at 15 °C, 263.12 h (11 days) at 20 °C, 164.63 h (7 days) at 25 °C, 140.69 h (6 days) at 30 °C and 172.04 h (7 days) at 35 °C. The optimal development temperature for D. gallinae was 30 °C, with the greatest survival in all stages and the shortest development time. High mortality at 35 °C indicated that this temperature had adverse effects on development of D. gallinae, and that in field conditions D. gallinae populations may decrease or even disappear due to the negative impact of high temperature on development. There were no significant differences in the pre-oviposition period among the four temperatures 20–35 °C, indicating that temperature did not affect this part of the life cycle.

  • thermal requirements of Dermanyssus gallinae de geer 1778 acari dermanyssidae
    Revista Brasileira De Parasitologia Veterinaria, 2008
    Co-Authors: Edna Clara Tucci, Angelo Pires Do Prado, Raquel Pires De Araujo
    Abstract:

    TUCCI, E.C.; PRADO, A.P. DO; ARAUJO, R.P. DE Thermal requirements of Dermanyssus gallinae (De Geer, 1778) (Acari: Dermanyssidae) (Necessidades termicas de Dermanyssus gallinae (De Geer, 1778) (Acari: Dermanyssidae)). Revista Brasileira de Parasitologia Veterinaria, v. 17, n. 2, p. 67-72, 2008. Insti- tuto Biologico, Centro de Pesquisa e Desenvolvimento em Sanidade Animal, Av. Conselheiro Rodrigues Alves, 1252. 04014-002, Sao Paulo, Brazil. E-mail: tucci@biologico.sp.gov.br The thermal requirements for development of Dermanyssus gallinae were studied under laboratory conditions at 15, 20, 25, 30 and 35°C, a 12h photoperiod and 60-85% RH. The thermal requirements for D. gallinae were as follows. Preoviposition: base temperature 3.4 o C, thermal constant (k) 562.85 degree-hours, determination coefficient (R 2 ) 0.59, regression equation: Y= -0.006035 + 0.001777 x. Egg: base temperature 10.60 o C, thermal constant (k) 689.65 degree-hours, determination coefficient (R 2 ) 0.94, regression equation: Y= -0.015367 + 0.001450 x. Larva: base temperature 9.82 o C, thermal constant (k) 464.91 degree-hours, determination coefficient R 2 0.87, regression equation: Y= -0.021123+0.002151 x. Protonymph: base temperature 10.17 o C, thermal constant (k) 504.49 degree- hours, determination coefficient (R 2 ) 0.90, regression equation: Y= -0.020152 + 0.001982 x. Deutonymph: base temperature 11.80 o C, thermal constant (k) 501.11 degree-hours, determination coefficient (R 2 ) 0.99, regression equation: Y= -0.023555 + 0.001996 x. The results obtained showed that 15 to 42 generations of Dermanyssus gallinae may occur during the year in the State of Sao Paulo, as estimated based on isotherm charts. Dermanyssus gallinae may develop continually in the State of Sao Paulo, with a population decrease in the winter. There were differences between the developmental stages of D. gallinae in relation to thermal requirements.

Edna Clara Tucci - One of the best experts on this subject based on the ideXlab platform.

  • development of Dermanyssus gallinae acari dermanyssidae at different temperatures
    Veterinary Parasitology, 2008
    Co-Authors: Edna Clara Tucci, Angelo Pires Do Prado, Raquel Pires De Araujo
    Abstract:

    Abstract The development, viability, and life cycle parameters of Dermanyssus gallinae at five different temperatures (15, 20, 25, 30 and 35 °C), and at relative humidity 70–85% were evaluated. Life cycle duration was 690.75 h (28 days) at 15 °C, 263.12 h (11 days) at 20 °C, 164.63 h (7 days) at 25 °C, 140.69 h (6 days) at 30 °C and 172.04 h (7 days) at 35 °C. The optimal development temperature for D. gallinae was 30 °C, with the greatest survival in all stages and the shortest development time. High mortality at 35 °C indicated that this temperature had adverse effects on development of D. gallinae, and that in field conditions D. gallinae populations may decrease or even disappear due to the negative impact of high temperature on development. There were no significant differences in the pre-oviposition period among the four temperatures 20–35 °C, indicating that temperature did not affect this part of the life cycle.

  • thermal requirements of Dermanyssus gallinae de geer 1778 acari dermanyssidae
    Revista Brasileira De Parasitologia Veterinaria, 2008
    Co-Authors: Edna Clara Tucci, Angelo Pires Do Prado, Raquel Pires De Araujo
    Abstract:

    TUCCI, E.C.; PRADO, A.P. DO; ARAUJO, R.P. DE Thermal requirements of Dermanyssus gallinae (De Geer, 1778) (Acari: Dermanyssidae) (Necessidades termicas de Dermanyssus gallinae (De Geer, 1778) (Acari: Dermanyssidae)). Revista Brasileira de Parasitologia Veterinaria, v. 17, n. 2, p. 67-72, 2008. Insti- tuto Biologico, Centro de Pesquisa e Desenvolvimento em Sanidade Animal, Av. Conselheiro Rodrigues Alves, 1252. 04014-002, Sao Paulo, Brazil. E-mail: tucci@biologico.sp.gov.br The thermal requirements for development of Dermanyssus gallinae were studied under laboratory conditions at 15, 20, 25, 30 and 35°C, a 12h photoperiod and 60-85% RH. The thermal requirements for D. gallinae were as follows. Preoviposition: base temperature 3.4 o C, thermal constant (k) 562.85 degree-hours, determination coefficient (R 2 ) 0.59, regression equation: Y= -0.006035 + 0.001777 x. Egg: base temperature 10.60 o C, thermal constant (k) 689.65 degree-hours, determination coefficient (R 2 ) 0.94, regression equation: Y= -0.015367 + 0.001450 x. Larva: base temperature 9.82 o C, thermal constant (k) 464.91 degree-hours, determination coefficient R 2 0.87, regression equation: Y= -0.021123+0.002151 x. Protonymph: base temperature 10.17 o C, thermal constant (k) 504.49 degree- hours, determination coefficient (R 2 ) 0.90, regression equation: Y= -0.020152 + 0.001982 x. Deutonymph: base temperature 11.80 o C, thermal constant (k) 501.11 degree-hours, determination coefficient (R 2 ) 0.99, regression equation: Y= -0.023555 + 0.001996 x. The results obtained showed that 15 to 42 generations of Dermanyssus gallinae may occur during the year in the State of Sao Paulo, as estimated based on isotherm charts. Dermanyssus gallinae may develop continually in the State of Sao Paulo, with a population decrease in the winter. There were differences between the developmental stages of D. gallinae in relation to thermal requirements.

  • acao acaricida de extratos foliares de especies de coffea rubiaceae sobre Dermanyssus gallinae de geer 1778 acari dermanyssidae
    Arquivos do Instituto Biologico, 2001
    Co-Authors: F Morrone, Edna Clara Tucci, M A S Mayworm, Antonio Salatino, O Guerreirofilho
    Abstract:

    Chloroformic, ethanolic and aqueous extracts of dried leaves of Coffea species were assessed for acaricide activity against Dermanyssus gallinae and caffeine content was measured. Strong acaricide activity was observed on chloroformic extracts of C. racemosa (100%), C. canephora (100%), C. salvatrix (82%), C. stenophylla (73%), C. arabica (83%) and ethanolic extract of C. canephora (90%). Others ethanolic extracts showed moderate activity against D. gallinae (45-62%). The aqueous extracts showed weak activity. Higher caffeine content were observed on chloroformic extracts of C. arabica (0.436%), C. canephora (0.246%), C. stenophylla (0.132%), C. liberica (0.127%) and ethanolic extracts of C. arabica (0.131%) e C. canephora (0.077%). Tests with caffeine solutions (0.01 – 1.0%) no demonstrated effective acaricidal activity.

Claude Chauve - One of the best experts on this subject based on the ideXlab platform.

  • experimental infection of salmonella enteritidis by the poultry red mite Dermanyssus gallinae
    Veterinary Parasitology, 2007
    Co-Authors: Valiente C Moro, Claude Chauve, Lionel Zenner
    Abstract:

    Abstract Dermanyssus gallinae is an important ectoparasite of laying hens in Europe and it is suspected of being a vector of pathogens. We carried out an in vitro study to evaluate the role of D. gallinae as a vector of Salmonella enterica subsp. enterica serotype Enteritidis. Two means of infecting the mite were tested: through the blood meal and after cuticular contact. Mites became carriers of Salmonella immediately after the infection with 29% and 53%, respectively, for oral route and cuticular contact. This percentage increased over time until it reached 95% (D7) and 80% (D14). The numerical identification of bacteria on the selective medium SM ID demonstrated the multiplication of Salmonella inside previously infected mites. In addition, transovarial passage as well as transstadial passage (from N1 to N2 stages) were demonstrated. Moreover, the observation of a negative effect of Salmonella on Dermanyssus oviposition was also observed. Finally, previously infected mites were able to contaminate the blood during the blood meal. Therefore, it appears that D. gallinae may act as a biological vector of S . Enteritidis under experimental conditions. It may represent a suitable environment for the development of Salmonella and could be an additional factor for the persistence of salmonellosis infection between successive flocks.

  • The poultry red mite Dermanyssus gallinae (De Geer, 1778): current situation and future prospects for control.
    Veterinary Parasitology, 1998
    Co-Authors: Claude Chauve
    Abstract:

    Abstract The current importance of Dermanyssus gallinae , mainly in egg layer, in Europe is pointed out. The limits of conventional control methods are underlined (development of mite resistance – future insecticide legislation and animal welfare legislation). Alternative control methods such as feeding deterrents or biological control, are reviewed in the context of poultry pest management.

Jaime Potti - One of the best experts on this subject based on the ideXlab platform.

  • nest dwelling ectoparasites reduce begging effort in pied flycatcher ficedula hypoleuca nestlings
    Ibis, 2016
    Co-Authors: Gregorio Morenorueda, Carlos Camacho, David Canal, Tomas Redondo, David Ochoa, Jaime Potti
    Abstract:

    Parasitized nestlings might be expected to increase begging effort to obtain additional resources to compensate for those sequestered by their parasites. However, begging is costly and chicks harbouring parasites may find it more difficult to attain high begging levels. Consequently, we predicted that, for the same level of nutritional need, nestlings that are parasitized will invest less in begging than those that are not parasitized. We tested this prediction by measuring begging in Pied Flycatcher Ficedula hypoleuca nestlings parasitized with haematophagous mites Dermanyssus gallinoides and Dermanyssus gallinae and blowfly larvae Protocalliphora azurea, and subjected to different levels of food deprivation in order to control for short‐term nutritional need. Nestlings from nests with ectoparasites spent less time begging than those from nests without parasites, especially when very hungry, although there was no association with latency to beg or begging intensity. Our results suggest that time invested in begging may indicate not only the level of need, but also nestling parasitism status.

Roy Lise - One of the best experts on this subject based on the ideXlab platform.

  • Transcriptomic analysis of the poultry red mite, Dermanyssus gallinae, across all stages of the lifecycle
    'Springer Science and Business Media LLC', 2021
    Co-Authors: Bartley Kathryn, Roy Lise, Nunn Francesca, Nisbet, Alasdair J., Chen Wan, Lloyd Mills Richard, Price, Daniel R. G., Rombauts Stephane, Van De Peer, Yves, Burgess, Stewart T. G.
    Abstract:

    The blood feeding poultry red mite (PRM), Dermanyssus gallinae, causes substantial economic damage to the egg laying industry worldwide, and is a serious welfare concern for laying hens and poultry house workers. In this study we have investigated the temporal gene expression across the 6 stages/sexes (egg, larvae, protonymph and deutonymph, adult male and adult female) of this neglected parasite in order to understand the temporal expression associated with development, parasitic lifestyle, reproduction and allergen expression

  • Dermanyssus GALLINAE: The reason for a COST ACTION (COREMI)
    2018
    Co-Authors: Sparagano Olivier, Tomley Fiona, Finn Robert, Tiligada Katerina, Roy Lise, Horvatek Tomić Danijela, Giangaspero Annunziata
    Abstract:

    The poultry red mite (PRM), Dermanyssus gallinae, is best known as a threat to the laying hen industry, adversely affecting hen health and welfare through both its feeding behavior and role as disease vector. However, due to its genetic plasticity, PRM attacks wild and synanthropic birds as well and, more importantly, has consequences in non-avian hosts, particularly humans. Poultry workers, farmers, technicians and veterinarians are most at risk for dermanyssosis and the inclusion of PRM as an occupational hazard has been recommended. In the mean time, reports of dermatological complaints have increased in frequency, in several countries, including residential town settings (private homes, hospitals, public offices), typically linked to nearby feral (pigeons, sparrows, etc.) (mostly recently-abandoned) birds’ nests. Attacks of D. gallinae to humans cause pruritus, skin lesions characterized by small erythematous papules -mostly concentrated on arms, hands, chest, legs - which are often misdiagnosed by medical clinicians. The medical significance of dermanyssosis is exacerbated by the potential of the PRM to carry and transmit zoonotic diseases of both bacterial and viral origin. Additionally, in the poultry farm context, since chemicals are still the dominant means of PRM control, they may have adverse effects on humans, both directly, for workers exposed to chemicals and indirectly through consumption of poultry meat and eggs containing pesticide residues. The recent scandal on the use of an unlicensed product (fipronil) provides clear evidence of such risk. The CoReMi COST Action also focuses on the One Health paradigm, aimed to encourage interactions and exchange information among medical practitioners, environmentalists, veterinarians, academics, industrial researchers, and promoting actions for an increase awareness of D. gallinae infestations in humans, mite identification, development of diagnostic tools, advance and use of non-chemicals control measures, in order to limit the consequences of D. gallinae and safeguard animal, human and environmental health. The authors wish to thank the European Cooperation in Science and Technology (COST Action (FA1404 - COREMI)“Improving current understanding and research for sustainable control of the poultry red mite Dermanyssus gallinae”)

  • Poultry Red Mite. A continuing threat to the poultry industry
    2015
    Co-Authors: Sparagano Olivier, Mul Monique, Camarda Antonio, Roy Lise, Papadopoulos Elias, Bartley Kathryn, Giangaspero Annunziata
    Abstract:

    Researchers from 20 Countries met to discuss Dermanyssus gallinae. The 1st Cost Conference and Management Committee Meeting on ‘Improving current understanding and research for sustainable Control of the poultry Red Mite Dermanyssus gallinae (CO.RE.MI) – COST ACTION FA1404 – was held in Foggia (Italy) 28-29th May 201

  • Ecologie évolutive d'un genre d'acarien hématophage : approche phylogénétique des délimitations interspécifiques et caractérisation comparative des populations de cinq espèces du genre Dermanyssus (Acari : Mesostigmata)
    HAL CCSD, 2009
    Co-Authors: Roy Lise
    Abstract:

    Micropredator species of Dermanyssus (Moss'gallinae-group), which parasitize birds, represent an interesting model for the study of loose associations. Thus, these unwinged arthropods do not stay on host (blood meal as quick as mosquitoe's), are part of the nest's microecosystem and their hosts are winged. Moreover, micropredator Dermanyssus include at least one species of economic importance in fowl farms, D. gallinae (the Poultry Red Mite), which enables the comparison between species restricted to wild avifauna and synanthropic species. At the beginning of the study, micropredator species are not clearly delimited. Most of species specific morphological characters are variable within species, in some cases within population, and are overlapping between species. In the aim to investigate the ecological needs for proliferation in D. gallinae and its ways for dispersal, a DNA-based comparative analysis involving this species and its close relatives has been performed. The first section consists of the clearing of the taxonomy and species delineations. In the second section, ecological and intrinsic data (host specificity, flexibility) are compared between species of the gallinae-group. One species has been described (D. apodis), one lineage within D. gallinae seems to represent a cryptic species and D. longipes currently groups two different entities. Important ecological differences between D. gallinae and other species seem to result not only from human activities, but also from intrinsic characteristics. Currently, the role of trade flows in D. gallinae's spread in layer farms appears to be essential, at least in France, as opposed to the role of wild birds (nearly nul).Les acariens microprédateurs du genre Dermanyssus (espèces du groupe gallinae), inféodés aux oiseaux, représentent un modèle pour l'étude d'association lâche particulièrement intéressant : ces arthropodes aptères font partie intégrante du microécosystème du nid (repas de sang aussi rapide que celui du moustique) et leurs hôtes sont ailés. En outre, D. gallinae est une espèce d'importance économique, ce qui rend possible des comparaisons entre colonisation de milieux anthropisés et sauvages. Au début de l'étude, les espèces du groupe gallinae sont très mal délimitées. Les caractères morphologiques utilisés sont variables au sein de l'espèces, voire de la population, très chevauchants entre espèces. Afin de mieux comprendre les exigences écologiques du développement de D. gallinae et d'appréhender ses voies de dissémination, une investigation comparative basée sur des séquences d'ADN entre espèces du groupe gallinae a été adoptée. Un cheminement d'ordre taxinomique a permis de poser les bases nécessaires. Ensuite, l'exploration de certaines caractéristiques écologiques du groupe gallinae en relation avec sa phylogénie (spécificité d'hôte, flexibilité évolutive) a été menée à bien. Une espèce a été décrite, D. apodis, une lignée de D. gallinae constitue aussi une probable espèce inédite et D. longipes regroupe deux entités. Des différences écologiques marquées entre D. gallinae et les autres espèces semblent résulter non seulement de l'activité humaine, mais aussi de caractéristiques intrinsèques. Aujourd'hui, le rôle des flux commerciaux dans la dispersion de D. gallinae en élevage de pondeuses s'avère primordial, au moins en France, celui des oiseaux sauvages presque nul