[An epidemiological study on clonorchiasis sinensis in Hubei Province].

An epidemiological study on clonorchiasis sinensis was conducted in 62 counties and cities in Hubei Province during 1987-1991, and clonorchis sinensis was identified in 52 counties and cities. Human population studies showed there were patients with clonorchiasis sinensis in 29 of 31 counties and cities investigated, with infection rates of 0.1%-16.2%. There were five species in two families of freshwater spiral shells as first intermediate host of clonorchis sinensis, 31 species in seven families of freshwater fish (with five species of fish newly discovered) and one species of freshwater shrimp as second intermediate host, and six species as reservoir host. Studies revealed holding small fish in the mouth and eating undercooked roasted fish were two major modes of transmission for clonorchiasis sinensis in the province.

[Evaluation of prevalent status of kala-azar in endemic area of Hubei Province].

OBJECTIVE: To identify the diagnosis of 14 cases with "kala-azar" previously reported in Hubei Province since 1989 and to evaluate the present status of the disease. METHODS: Bone marrow smear, immunological test (LDTand IFAT), mouse inoculation, fungi culture, vector (Phlebotomus) and reservoir host (dog) survey. RESULTS: Among the 14 cases, 12 cases were progressive disseminated histoplasmois, one was an imported case and another one was a remnant skin type "kala-azar" case. An immunological survey was conducted during 1997-1999 in 25 townships located in 23 counties of 9 prefectures and cities. A total of 13,890 persons had been examined by LDT, the positive rate was 0.07%, no positive case was found among the persons under 40 years of age. During the survey, 1,756 persons had been examined by IFAT, the results were negative. No Phlebotomus chinensis had been found in the surveyed area. A total of 302 dogs were examined, no sick dog had been found. CONCLUSION: Kala-azar has been eradicated in Hubei Province.