In Utero Infections Responsible for Abortion, Stillbirth, and Birth of Weak Calves in Beef Cows

Mickelsen, W. Duane; Evermann, James F.

doi:10.1016/s0749-0720(15)30586-7

Cited by 17 publications

(9 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…O BoHV-1 está amplamente distribuído e com alta freqüência em rebanhos bovinos de todo o mundo (Mickelsen & Evermann 1994). Evidências sorológicas demonstram a presença, bem como a alta freqüência, das infecções pelo BoHV-1 também nos rebanhos brasileiros.…”

Section: Introductionunclassified

Fatores de risco associados à infecção pelo herpesvírus bovino 1 em rebanhos bovinos da região Oeste do Estado do Paraná

et al. 2008

View full text Add to dashboard Cite

The aim of this study was to determine the prevalence of positive herds and to identify the risk factors for BoHV-1 infection in breeding cattle herds in the Western region of Parana State. The statistic delineation, the serum samples and information regarding the selected farms, were the same employed in the study of bovine brucellosis for Parana State in the context of National Program for Control and Eradication of Brucellosis and Tuberculosis. The sampling was performed in two stages. Blood samples were collected from 1930 females aged ≥24 months from 295 non vaccinated herds. Serum samples were tested for antibodies against BoHV-1 using an indirect ELISA. The epidemiological questionnaire was applied on all the selected farms and aimed to obtain epidemiological data. Hundred ninety of the 295 herds were positive for BoHV-1, presenting prevalence of positive herds of 64. 41% [58.65-69.87%]. The number (≥23) of females aged 24 months (OR=2.22; IC: 1.09-4.51), purchased cattle (OR=2.68; IC: 1.48-4.82), use of common grass (OR=5.93; IC: 1.31-26.82), history of abortion in the last 12 months (OR=2.37; IC: 1.09-5.16) and presence of wildlife animals (OR=8.86; IC: 1.11-70.73) were identified as risk factors for BoHV-1 infection in the multivariate logistic regression. These results indicate that BoHV-1 infection is widespread in the studied region and that factors related to the herd characteristic and management are associated with the infection.INDEX TERMS: Prevalence, epidemiology, risk factors, bovine herpesvirus 1, indirect ELISA.

show abstract

Section: Introductionunclassified

Fatores de risco associados à infecção pelo herpesvírus bovino 1 em rebanhos bovinos da região Oeste do Estado do Paraná

et al. 2008

View full text Add to dashboard Cite

show abstract

“…19 Fever (mastitis, pneumonia), circulatory disease (myocarditis, severe anemia), hypoxia, and endotoxemia (Gram-negative sepsis) are possible conditions that may cause abortion indirectly. The dam is predisposed to infection through nonspecific immunosuppression that occurs during pregnancy.…”

Section: Effects Of Maternal Diseasementioning

confidence: 99%

“…The fetal side shows yellow discoloration and multiple discrete infarcts (arrows) due to vascular thrombosis. 19 Death in the embryonic stage leads to resorption. 18 Epizootic bovine abortion causes distinctive lesions in the fetal liver, lymph nodes, and spleen.…”

Section: Lesions In Fetusmentioning

confidence: 99%

“…19 Herd health status, vaccination history, pathogen virulence, access to toxic agents, and clustering of pregnancies all have relevance in determining the likelihood of epidemic loss. BHV-1, Brucella abortus, and Leptospira spp.…”

Section: Anatomymentioning

confidence: 99%

“…19 Chorioallantois, maternal aspect, adventitial placentation. Cotyledon proliferation is irregular but tissues are shiny, without fibrin, intercotyledonary hemorrhage, or necrosis.…”

mentioning

confidence: 99%

See 2 more Smart Citations