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. 1997;75(2):125–131.

Seasonal variation of Opisthorchis viverrini infection in cyprinoid fish in north-east Thailand: implications for parasite control and food safety.

P Sithithaworn 1, V Pipitgool 1, T Srisawangwong 1, D B Elkins 1, M R Haswell-Elkins 1
PMCID: PMC2486929  PMID: 9185364

Abstract

Reported is the seasonal pattern of Opisthorchis viverrini metacercariae in cyprinoid fish in north-east Thailand. Samples of fish were collected in 1991-92 at monthly intervals from two areas-Khon Kaen Province, where the opisthorchiasis transmission rate was high, and Mahasarakham Province, where the rate was low. Metacercarial loads in both study areas had similar seasonal patterns. High burdens occurred in the late rainy season and winter (July to January) with low burdens during the summer (March to June). The average burden for Puntius leiacanthus in Khon Kaen was 1.68 metacercariae per fish (127.43 per kg), higher than for all species of cyprinoid fish from the low transmission area. The intensities of infection among P. leiacanthus and Cyclocheilichthys armatus collected in Mahasarakham were comparable, but lower than the intensity of Hampala dispar (0.75 metacercariae per fish) concurrently sampled from the same area (P < 0.05). There was no significant difference in metacercarial load per kg between fish species from Mahasarakham. The results indicate that seasonal variation in metacercariae was a common phenomenon in areas with both high and low endemicity of infection. Also, the metacerarial load in fish was positively associated with infection levels among humans.

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Selected References

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  1. Brockelman W. Y., Upatham E. S., Viyanant V., Ardsungnoen S., Chantanawat R. Field studies on the transmission of the human liver fluke, Opisthorchis viverrini, in northeast Thailand: population changes of the snail intermediate host. Int J Parasitol. 1986 Oct;16(5):545–552. doi: 10.1016/0020-7519(86)90091-3. [DOI] [PubMed] [Google Scholar]
  2. Chanawong A., Waikagul J. Laboratory studies on host-parasite relationship of Bithynia snails and the liver fluke, Opisthorchis viverrini. Southeast Asian J Trop Med Public Health. 1991 Jun;22(2):235–239. [PubMed] [Google Scholar]
  3. Hinz E., Saowakontha S., Pipitgool V. Opisthorchiasis control in northeast Thailand: proposal for a new approach. Appl Parasitol. 1994 Jun;35(2):118–124. [PubMed] [Google Scholar]
  4. Saowakontha S., Pipitgool V., Pariyanonda S., Tesana S., Rojsathaporn K., Intarakhao C. Field trials in the control of Opisthorchis viverrini with an integrated programme in endemic areas of northeast Thailand. Parasitology. 1993 Apr;106(Pt 3):283–288. doi: 10.1017/s0031182000075107. [DOI] [PubMed] [Google Scholar]
  5. Sithithaworn P., Haswell-Elkins M. R., Mairiang P., Satarug S., Mairiang E., Vatanasapt V., Elkins D. B. Parasite-associated morbidity: liver fluke infection and bile duct cancer in northeast Thailand. Int J Parasitol. 1994 Sep;24(6):833–843. doi: 10.1016/0020-7519(94)90009-4. [DOI] [PubMed] [Google Scholar]
  6. Sithithaworn P., Tesana S., Pipitgool V., Kaewkes S., Pairojkul C., Sripa B., Paupairoj A., Thaiklar K. Relationship between faecal egg count and worm burden of Opisthorchis viverrini in human autopsy cases. Parasitology. 1991 Apr;102(Pt 2):277–281. doi: 10.1017/s0031182000062594. [DOI] [PubMed] [Google Scholar]
  7. Upatham E. S., Viyanant V., Brockelman W. Y., Kurathong S., Lee P., Kraengraeng R. Rate of re-infection by Opisthorchis viverrini in an endemic northeast Thai community after chemotherapy. Int J Parasitol. 1988 Jul;18(5):643–649. doi: 10.1016/0020-7519(88)90099-9. [DOI] [PubMed] [Google Scholar]
  8. Upatham E. S., Viyanant V., Kurathong S., Brockelman W. Y., Menaruchi A., Saowakontha S., Intarakhao C., Vajrasthira S., Warren K. S. Morbidity in relation to intensity of infection in Opisthorchiasis viverrini: study of a community in Khon Kaen, Thailand. Am J Trop Med Hyg. 1982 Nov;31(6):1156–1163. doi: 10.4269/ajtmh.1982.31.1156. [DOI] [PubMed] [Google Scholar]
  9. Vatanasapt V., Tangvoraphonkchai V., Titapant V., Pipitgool V., Viriyapap D., Sriamporn S. A high incidence of liver cancer in Khon Kaen Province, Thailand. Southeast Asian J Trop Med Public Health. 1990 Sep;21(3):489–494. [PubMed] [Google Scholar]
  10. Vichasri S., Viyanant V., Upatham E. S. Opisthorchis viverrini : intensity and rates of infection in cyprinoid fish from an endemic focus in Northeast Thailand. Southeast Asian J Trop Med Public Health. 1982 Mar;13(1):138–141. [PubMed] [Google Scholar]
  11. WYKOFF D. E., HARINASUTA C., JUTTIJUDATA P., WINN M. M. OPISTHORCHIS VIVERRINI IN THAILAND--THE LIFE CYCLE AND COMPARISON WITH O. FELINEUS. J Parasitol. 1965 Apr;51:207–214. [PubMed] [Google Scholar]

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