| isolation of mycoplasma bovis from bulk milk. | the prevalence of mycoplasma in vermont dairy farms was determined by two surveys conducted in march 1983 and january 1984. bulk tank milk samples representing 74% and 62% of the herds respectively were cultured. mycoplasma bovis was detected in 3 of the 2,346 bulk samples collected in the initial survey. the infection rate was 1.3 herds per thousand (95% confidence interval: 0.6-2.0 herds per thousand). no positive cultures were obtained in the second survey. | 1985 | 4017590 |