Intestinal protozoal infection, Traveller's diarrhoea, Giardia lamblia

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1 Key words: Intestinal protozoal infection, Traveller's diarrhoea, Giardia lamblia

2 Entamoeba coli, Enteromonas hominis Trichomonas hominis, Chilomastix mesnili E. hominis, C. mesnili I odamoeba buets-

3 Table 1 Intestinal protozoa detected in stools examination Fig. 1 Seasonal variation in the positivity rate during the first study (1983 `1984)

4 Table 2 Days of travel in the cases with protozoa Fig. 2 Days of stay in India, Nepal or Thailand of the cases with Giardia lamblia Table 3 Travel areas of 39 cases with Giardia lamblia Table 4 Age distribution of cases with Giardia lamblia

5 Table 5 Isolation of pathogenic bacteria or protozoas in the cases with Giardia lamblia Table 6 Symptoms of cases with Giardia lamblia Including the two cases with other protozoa T. hominis, E. coli, E. buetshlii, E. nana, E.

6 Table 7 Number of cases with Giardia lamblia among travellers to India and/or Nepal for more than 10 days

7 Microbio., 16: , ) From the Center for Disease Control: Giardiasis in travelers. J. Infec. Dis., 124: , ) Jokipii, L. & Jokipii, A.M.M.: Giradiasis in travelers : A prospective study. J. Infec. Dis., 130: , ) Worl Health Organization: Weekly Epidem. Rec., 55: , ) Cross, J.H. & Basaca-Sevilla, V.: Intestinal parasitic infection in southeast asia. Southeast Asian J. Trop. Med. Pub. Hlth., 12: , ) Amin, A.B., Amin, B.M., Bhagat, A.P. & Patel, J.C.: Incidence of helminthiasis and protozoal infections in Bombay. J. Indian Med. Association, 72: , ) Flournoy, D.J., Mcnabb, S.J.N., Dodd, E.D. & Shaffer, M.H.: Rapid trichrome stain. J. Clin. 14) Lopez, C.E., Juranek, D.D., Sinclair, S.P. & Schults, M.G.: Giardiasis in American travelers to mederia island, portugal. Am. J. Trop. Med. Hyg., 27: , ) Meyer, E.A. & Jarroll, E.L.: Giardiasis. Am. J. Epidem, 111: 1-12, ) WHO Scintific Working Group: Parasiterelated Diarrhoeas. Bull. WHO, 58: , 1980.

8 Incidence of Intestinal Protozoal Infection in Traveller's Diarrhoea Akio KIMURA, Yoshiichi MIENKAWA & Toshiyuki KITAURA Osaka Prefectural Institute of Public Health Hiroaki NAKANO Kobe Quarantine Station Ikuo GOTO & Nagashige IKEDA Osaka Airport Quarantine Station Hisao ABE Osaka Quarantine Station Tadasuke ONO & Toshio NAKABAYASHI Research Institute for Microbial Diseases, Osaka University Stools examination for intestinal protozoa in patients of traveller's diarrhoea were carried out in 1983 and 1984 (the 1st period), and in the period from July, 1985 to June, 1986 (the end period). Results obtained were as follow: 1) In the 1st period, stools from 1,256 patients who had oversea travel over 5 days were examined. Seven species of intestinal protozoa, including 39 cases with Giardia lamblia, were detected (3.9%). 2) 98% of all the positive cases were the travellers over 10 days and 67.4% were travellers over 30 days. 3) An aparent seasonal variation was recognised in the positivity rate. 4) 92% of the positive cases with Giardia lamblia (1st period) visited India, 64% Thailand, 41% Nepal. More than 70% of Giardia lamblia positive cases among travellers to India or Nepal, stayed over 10 days in the respective countries. 5) In the 2nd period, stools from 178 patients who stayed in India and/or Nepal more than 10 days were examined. Three species of intestinal protozoa, including 25 cases with G. lamblia were detected (14.0%). 6) 64 cases with G. lamblia were summarizes though the 1st and 2nd periods of examination. In 29 cases among them, some species of pathogenic bacteria or other species of intestinal protoxoa were concomitanly detected. 7) The positivity rate of G. lamblia in travellers who stayed over 10 days in India and/or Nepal was 12.9% in 1983 and 12.2% in 1984, and not significantry different from that (14.0%) in the 2nd period.

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