| giardiasis surveillance--united states, 1992-1997. | giardia intestinalis, the organism that causes the gastrointestinal illness giardiasis, is the most commonly diagnosed intestinal parasite in public health laboratories in the united states. in 1992, the council of state and territorial epidemiologists assigned giardiasis an event code that enabled states to begin voluntarily reporting surveillance data on giardiasis to cdc. | 2000 | 10955980 |
| 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 |
| 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 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 |
| epidemiologic surveillance for endemic giardia lamblia infection in vermont. the roles of waterborne and person-to-person transmission. | the authors studied 1,211 laboratory-confirmed, non-outbreak-related cases of giardiasis in vermont residents reported through vermont's laboratory-based active surveillance system between 1983 and 1986. giardiasis was the most common reportable disease in the state, with an average annual incidence rate of 45.9 cases per 100,000 population per year. this rate is higher than that in other states reporting giardiasis incidence. morbidity from giardiasis was also significant in that 30% of cases r ... | 1989 | 2923123 |
| elevated levels of immunoglobulin a to giardia lamblia during a waterborne outbreak of gastroenteritis. | during an outbreak of diarrheal illness among residents of a trailer park in rural vermont, 37 (30%) of 122 residents met the case definition of outbreak-related giardiasis. convalescent-phase sera from 24 residents and 20 nonresident control subjects were tested by enzyme-linked immunosorbent assay for immunoglobulin g (igg), igm, and iga antibodies to giardia lamblia. residents showed higher levels of parasite-specific antibody than did nonresident controls for igg and iga but not igm. nine re ... | 1989 | 2768460 |