Abstract Background In developed countries, intestinal parasites are generally considered as an agent occurring among people who are traveling to or immigrants from endemic area with poor sanitation. Also, recent epidemiological studies showed that Entamoeba histolytica could happen as sexually transmitted infection (STI). However, the epidemiology of the other intestinal parasite infestations (IPIs) is still unclear in many developed countries.Figure 1.Distribution of intestinal parasites.Intestinal parasitic infections were determined by modified O 0.2). Methods For stool samples from the patients with suspicion of infectious gastroenteritis, modified stool ova and parasite examination (modified O 30 as imported cases and 32 as domestic cases (Fig. 1). The most common parasites were G. duodenalis, E. histolytica, and Cryptosporidium spp. Interestingly, domestic parasite infections were limited to these three protozoa, in which four cases showed multiple protozoa. In contrast, various types of parasites were detected in imported cases. Multivariate logistic regression identified not only recent travel history to endemic area but also men who have sex with men and animal contact as independent risk factors for IPIs (Table 1). Conclusion G. duodenalis and Cryptosporidium spp. are commonly reported as domestic cases, whose frequency was the same level as that of E. histolytica. Also, the results from regression analysis suggest that these protozoa are spreading as sexually transmitted infection among MSM, and zoonoses. Molecular epidemiological study is currently underway. Active epidemiological surveillance is warranted in the other developed countries. Disclosures All Authors: No reported disclosures
Kawashima et al. (Thu,) studied this question.
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