RESUMO
A standard postmortem protocol, consisting of gross pathology, culture for mycobacteria and limited selective histopathology, was used in the randomised badger culling trial in Great Britain to detect Mycobacterium bovis infection. This standard protocol was compared with a more detailed protocol in which more tissues were examined grossly, more tissues were cultured, more culture slopes were seeded, the culture period was extended and tissues were examined routinely by histopathology. The standard protocol was more sensitive in badgers with gross visible lesions than in badgers with no gross visible lesions. When applied to the study population of badgers, the overall sensitivity of the standard protocol relative to the more detailed protocol was estimated to be 54.6 per cent (95 per cent confidence interval 44.9 to 69.8 per cent). Badgers with tuberculosis (tb) detected by the standard protocol had a mean of 7.6 tissues with microscopic lesions suspicious of tb. The additional badgers detected by the detailed protocol had a mean of 4.4 tissues with microscopic lesions suspicious of tb.
Assuntos
Mustelidae/microbiologia , Mycobacterium bovis/isolamento & purificação , Tuberculose/veterinária , Animais , Prevalência , Sensibilidade e Especificidade , Tuberculose/diagnóstico , Tuberculose/epidemiologia , Tuberculose/patologia , Reino Unido/epidemiologiaAssuntos
Doenças dos Bovinos/diagnóstico , Espasticidade Muscular/veterinária , Animais , Bovinos , Doenças dos Bovinos/sangue , Doenças dos Bovinos/patologia , Eletromiografia/veterinária , Feminino , Masculino , Espasticidade Muscular/diagnóstico , Espasticidade Muscular/patologia , Músculos/fisiopatologia , Fatores SexuaisAssuntos
Apiaceae/efeitos adversos , Dermatite Alérgica de Contato/veterinária , Irritantes/efeitos adversos , Transtornos de Fotossensibilidade/veterinária , Doenças dos Suínos/diagnóstico , Doenças dos Suínos/etiologia , Animais , Dermatite Alérgica de Contato/diagnóstico , Dermatite Alérgica de Contato/etiologia , Diagnóstico Diferencial , Feminino , Transtornos de Fotossensibilidade/diagnóstico , Transtornos de Fotossensibilidade/etiologia , Suínos , Doenças dos Suínos/patologiaRESUMO
Selected brains and fetal viscera from 190 aborted or stillborn bovine fetuses submitted to Veterinary Investigation Centres in England and Wales between August 1992 and January 1993 were examined histologically. Non-suppurative inflammation of the brain and/or myocardium and placental cotyledons was identified by light microscopy in 20 (10.5 per cent). An immunocytochemical examination of fixed tissue sections using antisera against Neospora caninum, Toxoplasma gondii and Sarcocystis species revealed positive immunolabelling for N caninum in the brains of eight (4.2 per cent), but no labelling with anti-T gondii or anti-Sarcocystis species antisera was evident. These results suggest that N caninum may be an important cause of reproductive failure in cattle in England and Wales.
Assuntos
Aborto Animal/parasitologia , Doenças dos Bovinos/epidemiologia , Coccidiose/veterinária , Morte Fetal/veterinária , Neospora/isolamento & purificação , Aborto Animal/patologia , Animais , Antígenos de Protozoários/análise , Encéfalo/embriologia , Encéfalo/parasitologia , Encéfalo/patologia , Bovinos , Doenças dos Bovinos/parasitologia , Coccidiose/epidemiologia , Coccidiose/parasitologia , Coleta de Dados , Encefalite/epidemiologia , Encefalite/parasitologia , Encefalite/patologia , Encefalite/veterinária , Inglaterra/epidemiologia , Feminino , Morte Fetal/parasitologia , Morte Fetal/patologia , Coração/embriologia , Coração/parasitologia , Técnicas Imunoenzimáticas/veterinária , Incidência , Miocardite/epidemiologia , Miocardite/parasitologia , Miocardite/patologia , Miocardite/veterinária , Miocárdio/patologia , Neospora/imunologia , Placenta/embriologia , Placenta/parasitologia , Placenta/patologia , Gravidez , País de Gales/epidemiologiaRESUMO
An outbreak of the pruritus, pyrexia, haemorrhagic syndrome affected eight of a herd of 175 cows which was divided into two groups of 115 and 60 according to yield. There was no difference in management between them but citrus pulp pellets were fed only to the larger group in which the eight cows were affected. Silage, which had been made without the use of additives, was also fed to both groups. The citrus pulp was visibly mouldy and contained 30 to 40 parts per billion of citrinin. Signs of the syndrome occurred within three days of the cows starting to ingest the citrus pulp, which was fed for 21 days, and the last case occurred six days after the feeding of citrus pulp ceased. Five calves whose dams had been fed citrus pulp were subsequently born with superior prognathism. In contrast to the eight cows that developed the syndrome only one out of 68 heifers which were fed larger quantities of citrus pulp for 10 days developed mild signs of the syndrome and then recovered, suggesting that older animals may be more susceptible. The clinical signs, gross pathology and histopathology are described and compared with those of previous outbreaks. Mycotoxins, particularly citrinin, were strongly implicated as the cause of this outbreak.
Assuntos
Ração Animal/efeitos adversos , Doenças dos Bovinos/induzido quimicamente , Citrinina/efeitos adversos , Surtos de Doenças/veterinária , Febre/veterinária , Hemorragia/veterinária , Prurido/veterinária , Animais , Bovinos , Doenças dos Bovinos/patologia , Citrus/efeitos adversos , Feminino , Febre/induzido quimicamente , Febre/patologia , Hemorragia/induzido quimicamente , Hemorragia/patologia , Gravidez , Complicações na Gravidez/induzido quimicamente , Complicações na Gravidez/veterinária , Prurido/induzido quimicamente , Prurido/patologia , Silagem/efeitos adversos , SíndromeAssuntos
Infecções por Bordetella/veterinária , Pneumonia/veterinária , Infecções Estreptocócicas/veterinária , Doenças dos Suínos/microbiologia , Animais , Bordetella/isolamento & purificação , Infecções por Bordetella/complicações , Infecções por Bordetella/microbiologia , Infecções por Bordetella/patologia , Feminino , Pulmão/microbiologia , Pulmão/patologia , Pneumonia/microbiologia , Pneumonia/patologia , Infecções Estreptocócicas/complicações , Infecções Estreptocócicas/microbiologia , Infecções Estreptocócicas/patologia , Streptococcus/isolamento & purificação , Suínos , Doenças dos Suínos/patologiaRESUMO
Retarded growth rates and delayed onset of egg production were recorded in 22-week-old pullets reared on deep litter and with indirect contact with pigs. Birds reared in cages or transferred to cages were unaffected. Spirochaetes were isolated and identified from the intestines of the pullets reared on deep litter but not from those reared in cages. Birds kept solely on deep litter were more severely affected, with 24 per cent immature birds and 10 per cent mortality compared with those transferred from deep litter to cages where no mortality was recorded but 15 to 22 per cent were found to be immature. The histopathological changes are described and the significance of the findings is discussed.
Assuntos
Galinhas , Doenças das Aves Domésticas/fisiopatologia , Infecções por Spirochaetales/veterinária , Animais , Peso Corporal , Feminino , Imunofluorescência , Abrigo para Animais , Oviposição , Spirochaetales/isolamento & purificação , Infecções por Spirochaetales/fisiopatologia , SuínosRESUMO
When 1,711 bovine faecal samples from 113 farms in eight dairy areas of Colombia were examined for the presence of helminth eggs Fasciola hepatica eggs were found in the faeces from 60% of the farms and samples from animals kept above 2,000 m. Strongyle eggs were found in faeces from 82% of the farms and in 18% of the samples.
Assuntos
Doenças dos Bovinos/epidemiologia , Fasciolíase/veterinária , Enteropatias Parasitárias/veterinária , Infecções por Nematoides/veterinária , Altitude , Animais , Bovinos , Doenças dos Bovinos/parasitologia , Clima , Colômbia , Indústria de Laticínios , Fasciolíase/epidemiologia , Fezes/parasitologia , Feminino , Enteropatias Parasitárias/epidemiologia , Infecções por Nematoides/epidemiologia , Contagem de Ovos de ParasitasRESUMO
Of 4,144 serum samples collected from cows on 113 farms from eight areas of Colombia 3.3% had positive and 8.8% inconclusive titres to Brucella abortus, 21.7, 6.3, 1.6, 0.6 and 0.7% of cows had positive titres to Leptospira serovars hardjo, pomona, canicola, icterohaemorrhagiae and grippotyphosa respectively. Questionnaires completed on 110 farms revealed that 6, 2.5 and 4.6% of cows had had metritis, aborted or retained their placentas respectively in the previous 12 months. Trichomonas foetus and Campylobacter fetus were isolated from 13.7% and 15% of the bulls sampled on 103 farms. Six and two bulls had inconclusive and positive titres to Brucella abortus. Eight and 23 bulls had positive titres to pomona and hardjo. The results were discussed and remedies for control suggested.