| prevalence and genotypes of giardia duodenalis in 1-2 year old dairy cattle. | to determine the prevalence of giardia genotypes in 12-24 month old dairy heifers, fecal specimens were collected from two farms each in vermont, new york, pennsylvania, maryland, virginia, north carolina, and florida. specimens, cleaned of fecal debris and concentrated using cscl density gradient centrifugation, were subjected to pcr and dna sequence analysis. prevalence of giardia infection, ranged from 11% to 75% on 14 farms with an average prevalence of 36% (204 positive cattle out of 571 ex ... | 2006 | 16647818 |
| prevalence and genotypes of giardia duodenalis in post-weaned dairy calves. | to determine the prevalence of giardia genotypes in post-weaned dairy calves, fecal specimens were collected from 3 to 11-month-old dairy calves per farm on two farms in vermont, new york, pennsylvania, maryland, virginia, north carolina, and florida. specimens cleaned of fecal debris and concentrated using cscl density gradient centrifugation were stained and examined by immunofluorescence microscopy and also subjected to pcr and dna sequence analysis. overall, pcr provided more sensitive detec ... | 2005 | 15925721 |
| prevalence of giardia duodenalis genotypes in pre-weaned dairy calves. | to determine the prevalence of giardia genotypes in pre-weaned dairy calves, fecal samples were collected from a minimum of 18, 1-7-week-old dairy calves per farm on two farms each in the states of vermont, new york, pennsylvania, maryland, virginia, north carolina, and florida. samples cleaned of fecal debris and concentrated using cscl density gradient centrifugation were stained and examined by immunofluorescence microscopy and also subjected to pcr and gene sequence analysis. prevalence by p ... | 2004 | 15381298 |