assessment of inadequately filtered public drinking water--washington, d.c., december 1993.the risk for waterborne infectious diseases increases when filtration and other standard water-treatment measures fail. on december 6, 1993, water-treatment plant operators in the district of columbia (dc) began to have difficulty maintaining optimal filter effectiveness. on december 7, filter performance worsened, and levels of turbidity (i.e., small suspended particles) exceeded those permitted by u.s. environmental protection agency (epa) standards. on december 8, dc residents were advised to ...19948072479
cryptosporidiosis in washington state: an outbreak associated with well 1994, an outbreak of cryptosporidiosis occurred in a rural community in washington state where water was supplied by two deep unchlorinated wells. confirmed case-patients had a stool specimen containing cryptosporidium parvum oocysts. probable case-patients had diarrhea lasting > or = 5 days. sixty-two households (68.1% of 91) responded to a survey. eighty-six cases (15 confirmed, 71 probable) were identified, for an attack rate of 50.9% (86/169 residents). drinking unboiled well water was as ...19968940238
an outbreak of cryptosporidiosis linked to a september and october 1998, a cryptosporidiosis outbreak occurred on a washington, dc, university campus. in a case-control study of 88 case patients and 67 control subjects, eating in 1 of 2 cafeterias was associated with diarrheal illness (p<.001). morbidity was associated with eating dinner on 22 september (odds ratio, 8.1; 95% confidence interval, 3.4-19.5); weaker associations were found for 6 other meals. cryptosporidium parvum was detected in stool specimens of 16 (70%) of 23 ill stude ...200010669357
detection of cryptosporidium antibodies in sera and oral fluids using multiplex bead assay.for the first time, a multiplex bead assay (mba) was used to assay oral fluid and serum specimens for immunoglobulin g (igg) antibodies to specific cryptosporidium parvum antigens that were coupled to polystyrene beads. recombinant c. parvum 17- and 27-kda antigens (r17 and r27, respectively) both linked with glutathione-s-transferase (gst) fusion proteins, native 17-kda antigen, and gst alone were each coupled to microspheres that could be differentiated based on variable amounts of internally ...200415165066
environmental load of cryptosporidium parvum oocysts from cattle manure in feedlots from the central and western united states.the first step in assessing the risk of water contamination by cryptosporidium parvum oocysts from feedlot cattle (bos taurus) production systems is to quantify the number of c. parvum oocysts present in the fecal material deposited by feedlot cattle. our primary objective for this project was to estimate the daily environmental load of c. parvum oocysts in fecal material deposited by feedlot cattle from across the central and western usa. our secondary goal was to genotype isolates of c. parvum ...200616391291
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