Devera R A, Punos G N, Velásquez V J, Catanese J A, Meneses R G
Departamento de Medicina Tropical, Instituto Oswaldo Cruz, FIOCRUZ, Río de Janeiro, Brasil.
Bol Chil Parasitol. 1997 Jul-Dec;52(3-4):77-81.
Blastocystis hominis is found in about 25% of feces in normal asymptomatic people. Its pathogenic role is still discussed. A prospective study was performed to determine the prevalence of B. hominis infection in schoolchildren from Bolivar City. We evaluated 446 children, between five and fourteen years old, both sexes, using direct examination of feces and Willis Method. They were also evaluated clinically. Results showed that B. hominis had a prevalence of 16.8%. We did not find a statistically significant association between sex (P > 0.05) or age and infection with B. hominis (x2 = 1.94 g.l = 4). In 39 schoolchildren (52.0%) we identified other parasites along with B. hominis, the most frequent was Trichuris trichiura as helminth and Giardia lamblia as protozoan. We observed B. hominis alone in 36 cases (48.0%). There was a spectrum of clinical symptoms in 41 (54.7%) of all children evaluated. Diarrhea was the most frequently clinical manifestation observed. Other studies are necessary to determine clinical relevance of B. hominis in school population in Bolivar City.
人芽囊原虫在约25%正常无症状人群的粪便中被发现。其致病作用仍在讨论中。进行了一项前瞻性研究以确定来自玻利瓦尔市学童中人芽囊原虫感染的患病率。我们使用粪便直接检查法和威利斯方法评估了446名5至14岁的儿童，男女不限。他们也接受了临床评估。结果显示人芽囊原虫的患病率为16.8%。我们未发现性别（P>0.05）或年龄与人芽囊原虫感染之间存在统计学上的显著关联（x2 = 1.94，自由度 = 4）。在39名学童（52.0%）中，我们发现除人芽囊原虫外还存在其他寄生虫，最常见的蠕虫是鞭虫，原生动物是蓝氏贾第鞭毛虫。我们在36例（48.0%）中仅观察到人芽囊原虫。在所有接受评估的儿童中，41名（54.7%）有一系列临床症状。腹泻是观察到的最常见临床表现。需要进行其他研究以确定人芽囊原虫在玻利瓦尔市学童中的临床相关性。
