Results 161 to 170 of about 1,410 (190)
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Bovine Teat Atresia Associated with Horn Fly (Haematobia irritans irritans (L.))-induced Dermatitis
Veterinary Pathology, 2000Mammary gland lesions characterized primarily as mammary teat atresia were observed in a Limousin beef cattle herd in eastern Texas. Atresia of multiple teats per mammary gland was reported in firstcalf heifers at the time of calving. Pathogens were not identified in eight mammary glands collected at slaughter.
J F, Edwards +4 more
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Identification of microorganisms in partially fed female horn flies, Haematobia irritans
Parasitology Research, 2012The horn fly Haematobia irritans (Linnaeus, 1758) (Diptera: Muscidae) is one of the most important ectoparasites of cattle. The parasitism of horn flies interferes with cattle feeding, thus reducing weight gain and milk production. Additionally, horn flies are mechanical vectors of pathogens that cause disease in cattle.
Torres, Lorena +7 more
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Veterinary Parasitology, 2018
The distribution of Hematobia irritans is not homogeneous in cattle populations. Generally, between 15% and 30% of bovines carry more than 50% of the flies, and higher infestations occur in bulls. In this study, the effect of treating the bulls with ear tags containing 40% diazinon on the infestation of flies on the herd during the breeding season was ...
Cecilia Miraballes +6 more
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The distribution of Hematobia irritans is not homogeneous in cattle populations. Generally, between 15% and 30% of bovines carry more than 50% of the flies, and higher infestations occur in bulls. In this study, the effect of treating the bulls with ear tags containing 40% diazinon on the infestation of flies on the herd during the breeding season was ...
Cecilia Miraballes +6 more
openaire +2 more sources
Effects of Cold Stress on Survival and Reproduction of Haematobia irritans (Diptera: Muscidae)
Journal of Medical Entomology, 1998Adult horn fly, Haematobia irritans (L.), survival, mating success, and ovarian development were measured following exposure of pupae to 4 degrees C for 2, 3, and 4 wk, and were compared with an untreated control group held at 29 degrees C. Survival varied inversely with duration of low-temperature exposure, and ranged from 92.1% in the control to 7.0%
S R, Jones, S E, Kunz
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Acetylcholinesterase mutation in diazinon-resistant Haematobia irritans (L.) (Diptera: Muscidae)
Veterinary Parasitology, 2008Acetylcholinesterase (AChE) cDNA from individual field-collected diazinon-resistant horn flies was amplified by RT-PCR. Sequencing of the amplification products revealed that 8/12 of the diazinon-resistant horn flies contained a point mutation previously associated with resistance to organophosphates in house flies and Drosophila, strongly suggesting ...
Kevin B, Temeyer +6 more
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Veterinary Parasitology, 2008
Abundance of adult horn flies, Haematobia irritans irritans (L.), was monitored on 25 untreated Hereford cows in Tacuarembó Department, Uruguay, during three consecutive grazing seasons, from October 1999 to May 2002. The population showed a variable pattern of abundance during three years, with peaks in late summer-early fall of each year. Adult flies
E, Castro +6 more
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Abundance of adult horn flies, Haematobia irritans irritans (L.), was monitored on 25 untreated Hereford cows in Tacuarembó Department, Uruguay, during three consecutive grazing seasons, from October 1999 to May 2002. The population showed a variable pattern of abundance during three years, with peaks in late summer-early fall of each year. Adult flies
E, Castro +6 more
openaire +2 more sources
Haematobia irritans in Argentina
Veterinary Record, 1993O S, Anziani +4 more
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