| comparison of production variables of bovine leukemia virus antibody-negative and antibody-positive cows in two california dairy herds. | | 1978 | 209708 |
| effect of brucellosis vaccination and dehorning on transmission of bovine leukemia virus in heifers on a california dairy. | brucellosis vaccination and dehorning were examined for an association with bovine leukemia virus (blv) infection in heifers on a california dairy between april 1984 and june 1987. between december 1985 and june 1986, weaned heifers were dehorned using the gouge method at the time of brucellosis vaccination. using logistic regression, the estimated probability for a nondehorned heifer to seroconvert within three months after brucellosis vaccination (0.08) was significantly less than that for hei ... | 1990 | 2155048 |
| antibody prevalence of eight ruminant infectious diseases in california mule and black-tailed deer (odocoileus hemionus). | we tested 276 sera from 18 free-ranging black-tailed and mule deer (odocoileus hemionus) herds in california (usa) collected from 1987 to 1991 in five biogeographical habitat types, for antibodies against eight infectious disease agents. overall antibody prevalence was 56% for anaplasma marginale, 31% for borrelia burgdorferi, 16% for bluetongue virus serotype 17, 15% for epizootic hemorrhagic disease virus, 7% for coxiella burnetii and toxoplasma gondii, respectively, and 0% for bovine leukosis ... | 1994 | 8151824 |
| retrospective study of four years of carcass condemnation rates for malignant lymphoma in california cows. | a retrospective study was undertaken to examine monthly rates of carcass condemnation for bovine malignant lymphoma in adult dairy cows slaughtered between january 1979 and december 1982, in 2 plants (a and b) in the southern san joaquin valley of california. extremes (mean) of monthly rates for slaughterhouse a were 41 to 100 (65.9) per 10,000 slaughtered and for slaughterhouse b, 39 to 113 (94.1) per 10,000. the overall monthly mean rate was 80 per 10,000 slaughtered. equations for long-term t ... | 1985 | 2992323 |
| antibodies to bovine leukemia virus and presence of malignant lymphoma in slaughtered california dairy cattle. | rates of malignant lymphoma (ml) in california dairy cattle and relationships between ml and presence of antibodies to bovine leukemia virus (blv) were investigated. an excessively high rate of lymphoma was found in the population studied and a previously unknown relationship between ml and p-24 antibodies to blv was identified. sera from slaughtered california holstein dairy cows were tested by agar gel immunodiffusion for presence of antibodies to the gp-51 and p-24 antigens of blv. of the 7,7 ... | 1985 | 2983141 |
| protection of colostral antibodies against bovine leukemia virus infection in calves on a california dairy. | a three-year prospective study involving 244 calves was undertaken on a california dairy to evaluate the protective role of colostral antibodies against bovine leukemia virus (blv) infection in calves. calves were followed from birth to the time they left their individual hutch (tlih), at about 90 days of age. the probability of being infected at tlih and the daily risk of infection between birth and tlih were modelled using the logistic and the cox models, respectively. calves with no detectabl ... | 1989 | 2556213 |