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An epidemiological survey on intestinal parasite infection in Khammouane Province, Lao PDR, with special reference to Strongyloides infection.

To estimate the current prevalence of intestinal helminth infection in Lao PDR, a parasitological survey was conducted in three villages in Khammouane Province in December 1996, with special reference to Strongyloides infection. A total of 669 fecal samples were collected in the villages and examined by agar-plate culture method and Kato-Katz thick smear method. Intestinal helminths were demonstrated in 82% of the samples as follows: Ascaris lumbricoides (30.5%), Trichuris trichiura (23.7%), hookworm (28.8%), Strongyloides stercoralis (19.0%), Enterobius vermicuralis (3.4%), Opisthorchis viverrini (56.7%) and Taenia sp (3.0%). The infection rates of S. stercoralis were 27.5% and 18.4% in two rural villages, but only 9.4% in an urban village. The highest prevalence rate of Strongyloides infection was obtained in the age group from 20 to 29 years old, although the infection rate already reached 10% in the age group under 10 years old. The prevalence was consistently higher in male subject than females in almost all age groups.

Adolescent↗

[Intestinal parasites in foreigners entering East Germany].

Among the so-called imported diseases the intestinal parasitoses occupy an important place. Examinations of 5,168 foreigners who entered our country in the district of Halle resulted in the most frequent invasiveness for Trichuris trichiura (whipworm) with 54.33%, Ascaris lumbricoides (eel-worm) with 26.90% and ancylostomatides (hookworms) with 17.88%. The Entamoeba histolytica could be proved in 1.90% of the test persons, the Giardia lamblia in 3.35%. The severest parasitism showed persons from East Asia as well as from tropical and subtropical regions of Africa and America; multiple infestations were not infrequent. With regard to the possibility of the importation of parasitic infectious diseases given by the increasing intercontinental contacts, for which there is generally receptivity in our area, recent increases of extensity in autochthonic parasitoses which could be extensively restrained by effective anti-epidemic measures cannot be excluded. This needs on principle consideration in the establishment of programmes of antiparasitic action.

Germany, East↗

Intestinal parasites in returned travelers.

Parasites in the returned traveler can present in any organ system and at time periods quite distant from the activity or geographic exposure that created the risk for infection. All clinicians need to be aware that the most efficient approach to these unusual diseases starts with taking a travel history. The exciting challenge to the diagnostician and the laboratorian is to be able to respond to these clinical demands.

Disease Outbreaks↗