The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform
Douglas D. Colwell - One of the best experts on this subject based on the ideXlab platform.
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life history parameters of the cattle long nosed sucking louse Linognathus vituli
Medical and Veterinary Entomology, 2014Co-Authors: Douglas D. ColwellAbstract:Cattle sucking lice, Linognathus vituli (L.) (Phthiraptera: Linognathidae), were obtained from naturally infected cattle and maintained within ‘arenas’ affixed to the backs of cattle confined in controlled environment chambers maintained at a constant temperature of 15 °C. Temperatures measured within the arenas at an ambient temperature of 15 °C were constant at about 34 °C and only slightly above the temperature on nearby skin. The effect of temperature on egg development was determined using a gradient of temperatures between 25 °C and 41 °C. Eggs did not develop at temperatures of 39 °C. Survival of eggs was highest at temperatures of 30 °C and 35 °C. The earliest hatch was observed at 5 days post-oviposition (at 33–35 °C). Development was extended to as long as 13 days at the lower temperatures. Kaplan–Meier survival probabilities were compared for lice kept at two densities in the arenas and showed there to be no effect of density on louse survival. Similarly, the mean number of eggs/louse/day over an 8-day period was not influenced by louse density.
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Life history parameters of the cattle long‐nosed sucking louse, Linognathus vituli
Medical and veterinary entomology, 2014Co-Authors: Douglas D. ColwellAbstract:Cattle sucking lice, Linognathus vituli (L.) (Phthiraptera: Linognathidae), were obtained from naturally infected cattle and maintained within ‘arenas’ affixed to the backs of cattle confined in controlled environment chambers maintained at a constant temperature of 15 °C. Temperatures measured within the arenas at an ambient temperature of 15 °C were constant at about 34 °C and only slightly above the temperature on nearby skin. The effect of temperature on egg development was determined using a gradient of temperatures between 25 °C and 41 °C. Eggs did not develop at temperatures of 39 °C. Survival of eggs was highest at temperatures of 30 °C and 35 °C. The earliest hatch was observed at 5 days post-oviposition (at 33–35 °C). Development was extended to as long as 13 days at the lower temperatures. Kaplan–Meier survival probabilities were compared for lice kept at two densities in the arenas and showed there to be no effect of density on louse survival. Similarly, the mean number of eggs/louse/day over an 8-day period was not influenced by louse density.
R Farkas - One of the best experts on this subject based on the ideXlab platform.
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Survey on blood-sucking lice (Phthiraptera: Anoplura) of ruminants and pigs with molecular detection of Anaplasma and Rickettsia spp.
Veterinary parasitology, 2010Co-Authors: S Hornok, R Hofmann-lehmann, I G Fernández De Mera, M L Meli, V Elek, I Hajtós, A Répási, E Gönczi, B Tánczos, R FarkasAbstract:Lice may serve as biological or mechanical vectors for various infectious agents. To investigate louse infestation of ruminants and pigs, and pathogens potentially transmitted by them, anopluran lice (n=1182) were collected in Hungary, and evaluated for the presence of anaplasma, rickettsia and haemotropic mycoplasma DNA. On cattle the following species were found: Linognathus vituli (57%), Haematopinus eurysternus (38%) and Solenopotes capillatus (5%). L. vituli had a lower mean individual count/host when compared to H. eurysternus. On calves only L. vituli was observed, with a higher louse burden than on full-grown cattle. H. eurysternus and S. capillatus were more likely to occur simultaneously with another species on the same host, than L. vituli. Goats infested with Linognathus stenopsis had the overall highest prevalence (68%), while pigs harbouring Haematopinus suis showed the lowest (
Eleonor Palmer - One of the best experts on this subject based on the ideXlab platform.
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clinical efficacy of selamectin in the treatment of naturally acquired infection of sucking lice Linognathus setosus in dogs
Journal of The American Animal Hospital Association, 2005Co-Authors: Lotta Gunnarsson, Dan Christensson, Eleonor PalmerAbstract:A clinical study was performed in 21 dogs to evaluate the efficacy of selamectin for the treatment of naturally acquired infection of sucking lice (Linognathus setosus [L.setosus]) in dogs. Each dog was randomly assigned to one of two treatment groups. One group was treated with selamectin applied topically at a mean dosage of 7.9 mg/kg. The other group was treated with permethrin applied topically at a mean dosage of 85.7 mg/kg. At day 42 posttreatment, all animals remaining in the study (10 treated with selamectin and six with permethrin) were clear of lice. In both groups, the reduction in lice counts from pretreatment values to day 42 was statistically significant at P≤0.0001. Selamectin applied topically appeared to be effective against L. setosus infection in dogs.
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clinical efficacy of selamectin in the treatment of naturally acquired infection of sucking lice Linognathus setosus in dogs
Journal of The American Animal Hospital Association, 2005Co-Authors: Lotta Gunnarsson, Dan Christensson, Eleonor PalmerAbstract:A clinical study was performed in 21 dogs to evaluate the efficacy of selamectin for the treatment of naturally acquired infection of sucking lice (Linognathus setosus [L.setosus]) in dogs. Each dog was randomly assigned to one of two treatment groups. One group was treated with selamectin applied topically at a mean dosage of 7.9 mg/kg. The other group was treated with permethrin applied topically at a mean dosage of 85.7 mg/kg. At day 42 posttreatment, all animals remaining in the study (10 treated with selamectin and six with permethrin) were clear of lice. In both groups, the reduction in lice counts from pretreatment values to day 42 was statistically significant at P≤0.0001. Selamectin applied topically appeared to be effective against L. setosus infection in dogs.
Eberhard Mey - One of the best experts on this subject based on the ideXlab platform.
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Anoplura: Linognathidae), by Musca (Byomya) conducens Walker
2016Co-Authors: Ashley H. Kirk-spriggs, Eberhard MeyAbstract:Phoresy of a sucking louse, Linognathus sp. (Phthiraptera
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Phoresy of a sucking louse, Linognathus sp. (Phthiraptera: Anoplura: Linognathidae), by Musca ( Byomya ) conducens Walker (Diptera: Muscidae) in South Africa
African Invertebrates, 2014Co-Authors: Ashley H. Kirk-spriggs, Eberhard MeyAbstract:This paper reports the capture of a specimen of Musca (Byomya) conducens Walker, 1859 from Ndumo Game Reserve, South Africa, with two living lice (Linognathus sp.) attached to the legs, one to the left fore tarsus and another to the right mid tarsus. Phoresy in the Anoplura as a whole is extremely rare, and this case represents only the tenth record of phoresy of Anoplura on Diptera and only the fifth record on members of the family Muscidae. This case further represents the first recorded case of the same genus of lice being transported phoretically by more than one dipterous family, i.e., Culicidae and Muscidae. A photograph of one of the lice attached to the right mid tarsus is provided and previous records of anopluran phoresy are reviewed and discussed.
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Nuevos registros de Phthiraptera en cánidos y caprinos en Chile
Archivos de medicina veterinaria, 2005Co-Authors: Daniel González-acuña, Eberhard Mey, Dolores Del Carmen Castro, Lucila Moreno-salasAbstract:The presence of the Phthiraptera species Linognathus setosus (von Olfers 1816) andHeterodoxus spiniger (Enderlein 1909) on the domestic dog Canis familiaris...
Endrias Zewdu - One of the best experts on this subject based on the ideXlab platform.
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Study on the prevalence of ectoparasite infestation of ruminanats in and around Kombolcha and damage to fresh goat pelts and wet blue (pickled) skin at Kombolch Tannary, Northestern Ethiopia
Ethiopian Veterinary Journal, 2011Co-Authors: Abebayehu Tadesse, Endris Fentaw, Berhanu Mekbib, Rahmeto Abebe, Solomon Mekuria, Endrias ZewduAbstract:An attempt was made to study the prevalence of ectoparasite damage on live cattle, sheep and goats in and around Kombolcha town and on raw goat skin to assess their skin defect on processed wet-blue (pickled) skins at Kombolcha tannery, south wollo zone, North-Eastern Ethiopia. A total of 240 cattle, 175 sheep, 66 goats, were used to study the prevalence of ectoprasites on live animals as well as 344 fresh goat pelts and pickled (wet-blue) goat skins were used to assess skin defects. The result obtained from live cattle demonstrated a high prevalence of Amblyomma (28.33%) followed by Sarcoptes scabiei (23.75%), Boophilus (11.25%) Demodex (9.58%), Psoroptes (0.4 %), respevtively. The prevalence of ectoprasite infestation of live sheep revealed Mellophagus ovinus (sheep ked) (32.57%), Bovicola ovis (22.28%), Amblyomma spp (12.57%), Sarcoptes scabiei (14.28 %), Ctenocephaliedes spp (8.57%), Demodex (6.85%), Linognathus africanus (6.28%) and Boophilus spp (4%). The result from goats demonstrates a high prevalence of Sarcoptes scabiei (30.3%) followed by Linognathus stenopsis (9.09%), Amblyomma (4.54%), Ctenocephalides spp (3.03%), Bovicola caprea (1.51%) and Demodex (1.51%) in that order. Result obtained from fresh goats pelts revealed an over all high prevalence of Sacoptes scabie (53.29%) followed by Linognathus stenopsis (9.88%), Bovicola caprae (2.08%) and Demodex (2.08%). Examination of pickled (wet-blue) skins from follow-up skins show a high prevalence of scratch (74.25%) followed by “Ekek” (68.56%), scar (67.06%), processing defect (28.44%). “Ekek” (Typical scatter type cockle) was found to show a significant (P
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study on the prevalence of ectoparasite infestation of ruminanats in and around kombolcha and damage to fresh goat pelts and wet blue pickled skin at kombolch tannary northestern ethiopia
Ethiopian Veterinary Journal, 2011Co-Authors: Abebayehu Tadesse, Endris Fentaw, Berhanu Mekbib, Rahmeto Abebe, Solomon Mekuria, Endrias ZewduAbstract:An attempt was made to study the prevalence of ectoparasite damage on live cattle, sheep and goats in and around Kombolcha town and on raw goat skin to assess their skin defect on processed wet-blue (pickled) skins at Kombolcha tannery, south wollo zone, North-Eastern Ethiopia. A total of 240 cattle, 175 sheep, 66 goats, were used to study the prevalence of ectoprasites on live animals as well as 344 fresh goat pelts and pickled (wet-blue) goat skins were used to assess skin defects. The result obtained from live cattle demonstrated a high prevalence of Amblyomma (28.33%) followed by Sarcoptes scabiei (23.75%), Boophilus (11.25%) Demodex (9.58%), Psoroptes (0.4 %), respevtively. The prevalence of ectoprasite infestation of live sheep revealed Mellophagus ovinus (sheep ked) (32.57%), Bovicola ovis (22.28%), Amblyomma spp (12.57%), Sarcoptes scabiei (14.28 %), Ctenocephaliedes spp (8.57%), Demodex (6.85%), Linognathus africanus (6.28%) and Boophilus spp (4%). The result from goats demonstrates a high prevalence of Sarcoptes scabiei (30.3%) followed by Linognathus stenopsis (9.09%), Amblyomma (4.54%), Ctenocephalides spp (3.03%), Bovicola caprea (1.51%) and Demodex (1.51%) in that order. Result obtained from fresh goats pelts revealed an over all high prevalence of Sacoptes scabie (53.29%) followed by Linognathus stenopsis (9.88%), Bovicola caprae (2.08%) and Demodex (2.08%). Examination of pickled (wet-blue) skins from follow-up skins show a high prevalence of scratch (74.25%) followed by “Ekek” (68.56%), scar (67.06%), processing defect (28.44%). “Ekek” (Typical scatter type cockle) was found to show a significant (P<0.5) association with Sarcoptes scabiei, Linoganthus stenopsis, scratch and diseases scars, indicating the likely multifactor causes and one major skin problems in the study area.
