| a communitywide outbreak of giardiasis with evidence of transmission by a municipal water supply. | three hundred fifty residents of rome, new york, had laboratory-confirmed cases of giardiasis between 1 november 1974 and 7 june 1975. a random household survey showed an overall attack rate for giardiasis (defined as a diarrheal illness of 5 days or more) of 10.6%. a significant association was discovered between having giardiasis and using city water and between having illness and drinking 1 or more glasses of water a day. the presence of human settlements in the rome watershed area suggested ... | 1977 | 907241 |
| 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 |
| assessment and molecular characterization of human intestinal parasites in bivalves from orchard beach, ny, usa. | bivalves have been shown to be carriers of the human intestinal parasites cryptosporidium parvum and toxoplasma gondii. the goal of this study is to determine the prevalence of protozoan parasites in mollusks of new york city using a polymerase chain reaction (pcr)-based assay. four species of mollusks, mya arenaria, geukensia demissa, crassostrea virginica, and mytilis edulis, were collected from orchard beach, ny in the fall of 2014, totaling 159 specimens. each individual mollusk was dissecte ... | 2016 | 27043590 |
| toxoplasma gondii and giardia duodenalis infections in domestic dogs in new york city public parks. | toxoplasma gondii and giardia duodenalis have been widely reported to produce major diseases in humans and domestic animals. little is known about the occurrence of these protozoan parasites in domestic dogs in the united states. the goal of this study was to determine the prevalence and genotypes of t. gondii and g. duodenalis among dogs in new york city. fecal samples from domestic dogs were analyzed by polymerase chain reaction (pcr). overall, 3% of the samples tested positive for t. gondii, ... | 2016 | 26988633 |
| giardia outbreak associated with a roadside spring in rensselaer county, new york. | in september 2009, the rensselaer county department of health investigated an increase in giardia duodenalis cases. the epidemiological investigation identified that a source of the illness could be a roadside spring located in the eastern part of the county. epidemiological and environmental health staff conducted a site visit to the roadside spring and found several concerns. water samples were collected from the roadside spring and sent to the new york state department of health for analysis. ... | 2016 | 27388044 |
| prevalence of giardia duodenalis assemblages among dairy herds in the new york city watershed. | a longitudinal herd-level study was carried out to determine the cumulative incidence of giardia duodenalis infections in dairy cattle in the new york city watershed. we also sought to assess the changes in infection pattern of animals diagnosed as shedding giardia over time, determine risk factors that may be associated with g. duodenalis infections, and identify potentially zoonotic infections. a total of 2109 fecal samples were randomly collected from dairy cattle at 34 farms in the new york ... | 2011 | 21993211 |
| molecular characterization of potentially zoonotic isolates of giardia duodenalis in horses. | giardia isolates from eight horses from new york state (ny), usa and two horses from western australia (wa) were genetically characterized at the ssu-rdna and triose-phosphate isomerase (tpi) genes. phylogenetic analysis of the tpi gene provided strong support for the placement of both isolates of giardia from horses in wa and a single isolate from a horse in ny within the assemblage ai genotype of g. duodenalis. another two isolates from horses in ny placed within the assemblage aii genotype of ... | 2005 | 15925726 |
| 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 |
| incidence of intestinal parasitic disease in an acquired immunodeficiency syndrome day-care center. | in june, 1986, the bronx municipal hospital center opened an acquired immunodeficiency syndrome day-care center to provide a quality educational experience for children infected with the human immunodeficiency virus. a major concern was the possibility of increasing secondary infections among these immunocompromised children by placing them in a group environment. one particular worry was intestinal parasitic disease, a serious public health problem in day-care centers throughout the united stat ... | 1991 | 1923677 |
| epidemic of amoebiasis and giardiasis in a biased population. | of 126 homosexual men in a selected population in new york city, 31.7% were infected with entamoeba histolytica, 18.3% with giardia lamblia, and 39.7% with one or both on a single stool examination. of 5885 clinic and hospital patients examined in the same laboratory by the same methods, 1.3% were infected with e. histolytica, 2.1% with g. lamblia, and 3.3% with one or both. evidence indicates that an epidemic of intestinal protozoan infection exists in the homosexual male population in new york ... | 1979 | 228790 |