Clinical Relevance of Blastocystis Hominis

Garcia, LynneS.; Bruckner, DavidA.; Clancy, MaryN.; Casemore, D.P.; Armstrong, Martha U.; Jackson, F.Bruce

doi:10.1016/s0140-6736(84)91711-2

Cited by 54 publications

(43 citation statements)

References 11 publications

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“…In a 1984 study of 2,360 patients in the United States, prevalences of 20.6% for all parasitic species and 12.2% for cases of B. hominis infections were reported, with B. hominis constituting 59% of all infections. 3 The latter figure is much closer to our current finding of a B. hominis prevalence of 72% among all parasitic infections (Table 1). In 1995, overall B. hominis prevalences of 20−30% and greater than 15% were also reported from an unspecified number of patients.…”

Section: Discussionsupporting

confidence: 87%

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Seasonal prevalence of intestinal parasites in the United States during 2000.

Amin¹

2002

The American Journal of Tropical Medicine and Hygiene

115

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Abstract. One-third of 5,792 fecal specimens from 2,896 patients in 48 states and the District of Columbia tested positive for intestinal parasites during the year 2000. Multiple infections with 2−4 parasitic species constituted 10% of 916 infected cases. Blastocystis hominis infected 662 patients (23% or 72% of the 916 cases). Its prevalence appears to be increasing in recent years. Eighteen other species of intestinal parasites were identified. Cryptosporidium parvum and Entamoeba histolytica/E. dispar ranked second and third in prevalence, respectively. Prevalence of infection was lowest (22−27%) in winter, gradually increased during the spring, reached peaks of 36−43% between July and October, and gradually decreased to 32% in December. A new superior method of parasite detection using the Proto-fix™-CONSED™ system for fixing, transport, and processing of fecal specimens is described. In single infections, pathogenic protozoa caused asymptomatic subclinical infections in 0−31% of the cases and non-pathogenic protozoa unexpectedly caused symptoms in 73−100% of the cases. The relationship between Charcot-Leyden crystals and infection with four species of intestinal parasites is examined and the list of provoking parasitic causes is expanded.

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Section: Discussionsupporting

confidence: 87%

“…Asymptomatic infections with B. hominis varied between 30% and 60% in various populations in the United States. 1,3,9,21,22 In Canada, B. hominis is usually asymptomatic. 5 It is not known if the degree of pathogenicity of B. hominis is related to the distinct immunologic, serologic, and genetic identity of the demes constituting that species.…”

mentioning

confidence: 99%

Seasonal prevalence of intestinal parasites in the United States during 2000.

Amin¹

2002

The American Journal of Tropical Medicine and Hygiene

115

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“…Por otra parte, el 85,00% de los parasitados presentaron menos de cinco células del protozoario por cada diez campos microscópicos de 400x observados, lo cual puede explicar la escasez de manifestaciones clínicas y hasta la inespecificidad de los síntomas. Se ha informado que las personas con cargas parasitarias elevadas son las que presentan mayor sintomatología (De Carli & Rott, 1994;Devera et al, 1998a;Doyle et al, 1990;García et al, 1984;Kain et al, 1987;Ponce-de-León et al, 1991;Sheehan et al, 1986;Vannatta et al, 1985).…”

Section: Discussionunclassified

“…También se describen otros no específicos de infección gastrointestinal. Generalmente, no se encuentran leucocitos fecales y se ha observado eosinofilia en algunos casos (Boreham & Stenzel, 1993;Garavelli et al, , 1991García et al, 1984;Llibre et al, 1989;Sadek et al, 1997;Sheehan et al, 1986;Vannatta et al, 1985;Wang et al, 2002).…”

Section: Introductionunclassified

Prevalencia de Blastocystis hominis en vendedores ambulantes de comida del municipio Caroní, Estado Bolívar, Venezuela

et al. 2003

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“…The disease, lasting 2 months to 1 year, is characterized by diarrhea, abdo minal pains, anorexia, nausea, vomit, tenesmus, itching, exanthems and eosinophilia (Sheehan et al, 1986): particularly severe pictures are to be found mainly in immunocompromised subjects (Garcia et al, 1984) such as AIDS cases (Garavelli et al, 1988).…”

mentioning

confidence: 99%