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results of testing for intestinal parasites by state diagnostic laboratories, united states, 1987.we analyzed results of 216,275 stool specimens examined by the state diagnostic laboratories in 1987; parasites were found in 20.1%. percentages were highest for protozoans: giardia lamblia (7.2%), entamoeba coli and endolimax nana (4.2% each), blastocystis hominis (2.6%), entamoeba histolytica (0.9%), and cryptosporidium species (0.2%). identifications of giardia lamblia increased broadly from the 4.0% average found in 1979, with 40 states reporting increases and seven decreases. most states th ...19911779956
intestinal protozoan infection in a semicommunal group.a survey was conducted to determine the prevalence of protozoan parasites in a large semicommunal group in los angeles. protozoan parasites were observed in 151 (69%) of the 220 group members in the study. parasites were observed in stool specimens from 105 (76%) of the 138 children and 46 (56%) of the 82 adults. dientamoeba fragilis was observed in 115 (52%), giardia lamblia in 50 (23%), entamoeba histolytica in 9 (4%), and commensals in 61 (28%). parasitic infection was infrequent in infants l ...19836824128
enteric pathogenic protozoa in homosexual men from san francisco.the prevalence of enteric protozoa was studied in a survey conducted among 150 male homosexual patients in san francisco. all patients were from a private practice in internal medicine. each was asked to complete a questionnaire and to submit multiple stool specimens for examination. of this group, 47% were positive for one or more potentially pathogenic intestinal protozoa; entamoeba histolytica was found in 36%, entamoeba hartmanni in 35%, giardia lamblia in 5%, and dientamoeba fragilis in 1.3 ...19846087479
hepatic and gastric amebiasis in black and white colobus monkeys.three cases of hepatic amebiasis and one case of gastric amebiasis were diagnosed in black and white colobus monkeys during a 9-month period. the diagnosis was difficult because of the absence of trophozoites and cysts in the feces and because of few trophozoites found in many of the hepatic lesions. indirect hemagglutination titers were diagnostic in 2 monkeys.19836315656
intestinal protozoa in homosexual men of the san francisco bay area: prevalence and correlates of infection.to compare the prevalence of intestinal parasitic infection in male homosexuals selected from other sources with the levels previously reported from clinic-derived populations, various homosexual groups of the san francisco bay area were checked by means of stool examination and questionnaires for prevalence of intestinal parasites and for related sexual behavioral patterns during a 3-year period. the prevalence of entamoeba histolytica (28.6%) was similar to that reported in other studies, wher ...19846711741
intestinal protozoan infections: prevalence in the san francisco bay area.a sample of 415 members of the kaiser foundation health plan (kfhp) were tested for intestinal protozoa. this parasite survey group was found to be comparable in age distribution, sex and ethnic background with the membership at large. gastrointestinal complaints were no more numerous in this group than in a large series of kfhp members taking multiphasic examinations. because kfph membership included, at the time of the survey, approximately 27 percent of all residents of the san francisco bay ...19817340117
amebic abscess of the liver. experience with 15 cases in 3 and one-half years in california. 19694305088
amebic liver abscess: a 15-year experience.amebic liver abscess is increasingly common in the united states, particularly in the west and southwest, due to increased immigration from southeast asia, mexico, and central america. the presentation, course, and treatment of 50 patients treated for amebic liver abscess at a county-community hospital in san jose, california, between 1974 and 1988 is reviewed. the typical patient is an immigrant, usually a hispanic male, 20-40 yr old, who presents with fever, right upper quadrant pain, leukocyt ...19912038992
amebic infections in asymptomatic homosexual men, lack of evidence of invasive disease.a survey for enteric infections in 140 asymptomatic homosexual men who attended a community clinic revealed a high prevalence of infection with entamoeba histolytica (27.1 per cent) and giardia lamblia (15.7 per cent). in contrast, the prevalence of elevated indirect hemagglutination (iha) titers (greater than or equal to 1:128), which indicate invasive amebiasis, was low (5.7 per cent). our findings suggest that only a limited amount of invasive amebic disease is occurring in this group of homo ...19862874747
Amebiasis-Related Mortality among United States Residents, 1990-2007.Abstract. Despite the endemic nature of Entamoeba histolytica infection in the United States there is a lack of data on amebiasis-related mortality. We analyzed national death certificate data from 1990 to 2007 to assess the occurrence of amebiasis-related deaths and determine demographic and regional associations. A total of 134 deaths were identified. Mortality rates were highest in males, Hispanics, Asian/Pacific Islanders, and persons 75 years of age and older. An association with human immu ...201122144440
intestinal parasites among indochinese refugees and mexican immigrants resettled in contra costa county, california.stool examinations of 186 indochinese refugees and 90 immigrants from mexico resettled in contra costa, county, california, have shown that 60 percent of refugees and 39 percent of immigrants are infected with one or more species of pathogenic protozoa and helminths. the mean prevalences of infections among refugees and immigrants, respectively, were: hookworms, 25 and 2 percent; whipworm, 22 and 12 percent; ascaris, 20 and 12 percent; giardia lamblia, 11 and 11 percent; strongyloides, 9 and 1 p ...19817462932
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