Zhongguo ji sheng chong xue yu ji sheng chong bing za zhi = Chinese journal of parasitology & parasitic diseases · 2015
[Endemic Situation of Echinococcosis in Gannan Tibetan Autonomous Prefecture].
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MA Yu-an, SHANG Wen-jie
Аннотация
OBJECTIVE: To understand the endemic status of echinococcosis in Gannan Tibetan Autonomous Prefecture.
METHODS: The 2007-2013 survey data on hydatid disease prevention and control were collected from 8 counties/cities in Gannan Tibetan Autonomous Prefecture and analyzed. Ultrasound scanning was used to detect echinococcosis infection, ELISA was performed to detect anti-Echinococcus IgG in serum of children under 12 years, and double-antibody sandwich ELISA method was used to detect Echinococcus antigen in dog's feces. Visceral dissection was performed to examine hydatid infection in domestic ruminants.
RESULTS: The prevalence of echinococcosis in residents was 225/100 000 (810/360 440), comprising 224/10 0000 (807/360 440) for cystic echinococcosis and 1/100 000(3/360 440) for alveolar echinococcosis. The prevalence was 2.3/100 000(340/151 280) in males and 2.3/100 000(470/209 160) in females, with no significant difference(χ(2)=6.41 ,P>0.05). Among different age populations, the 30-40 age group had the highest proportion (44.2%, 358/810) to all detected infections. Besides, the prevalence was the highest in herdsmen, followed by farmers. Echinococcosis was detected in 372 administrative villages in the Prefecture. The positive rate for serum anti-Echinococcus IgG was 4.0%(1 921/47 841) in children under 12 years. The positive rate for Echinococcus antigen in dog's feces was 5.5% (3 523/64 521). The rate of hydatid infection in domestic ruminants was 3.3% (1 148/35 134). After seven years' comprehensive control, the prevalence of echinococcosis in residents dropped from 440/100 000(97/21 938) in 2007 to 290/100 000 (160/55 954) in 2013 (χ(2)=11.69,P<0.05). The positive rate for serum anti-Echinococcus IgG in children also dropped from 7.9% (150/1 902) in 2007 to 2.1% (151/7 100) in 2013. Consistently, the positive rate for Echinococcus antigen in dog's feces dropped from 11.9% (335/2 819) in 2007 to 3.3%(466/13 608) in 2013 (X(2)= 338.52,P<0.05); and the rate of hydatid infection in domestic ruminants dropped from 8.8%(235/2 658) in 2007 to 1.5%(107/7 271) in 2013(χ(2)=317.86, P<0.05).
CONCLUSION: The control activities during 2007-2013 has shown significant achievements in reducing echinococcosis in Gannan Tibetan Autonomous Prefecture.
METHODS: The 2007-2013 survey data on hydatid disease prevention and control were collected from 8 counties/cities in Gannan Tibetan Autonomous Prefecture and analyzed. Ultrasound scanning was used to detect echinococcosis infection, ELISA was performed to detect anti-Echinococcus IgG in serum of children under 12 years, and double-antibody sandwich ELISA method was used to detect Echinococcus antigen in dog's feces. Visceral dissection was performed to examine hydatid infection in domestic ruminants.
RESULTS: The prevalence of echinococcosis in residents was 225/100 000 (810/360 440), comprising 224/10 0000 (807/360 440) for cystic echinococcosis and 1/100 000(3/360 440) for alveolar echinococcosis. The prevalence was 2.3/100 000(340/151 280) in males and 2.3/100 000(470/209 160) in females, with no significant difference(χ(2)=6.41 ,P>0.05). Among different age populations, the 30-40 age group had the highest proportion (44.2%, 358/810) to all detected infections. Besides, the prevalence was the highest in herdsmen, followed by farmers. Echinococcosis was detected in 372 administrative villages in the Prefecture. The positive rate for serum anti-Echinococcus IgG was 4.0%(1 921/47 841) in children under 12 years. The positive rate for Echinococcus antigen in dog's feces was 5.5% (3 523/64 521). The rate of hydatid infection in domestic ruminants was 3.3% (1 148/35 134). After seven years' comprehensive control, the prevalence of echinococcosis in residents dropped from 440/100 000(97/21 938) in 2007 to 290/100 000 (160/55 954) in 2013 (χ(2)=11.69,P<0.05). The positive rate for serum anti-Echinococcus IgG in children also dropped from 7.9% (150/1 902) in 2007 to 2.1% (151/7 100) in 2013. Consistently, the positive rate for Echinococcus antigen in dog's feces dropped from 11.9% (335/2 819) in 2007 to 3.3%(466/13 608) in 2013 (X(2)= 338.52,P<0.05); and the rate of hydatid infection in domestic ruminants dropped from 8.8%(235/2 658) in 2007 to 1.5%(107/7 271) in 2013(χ(2)=317.86, P<0.05).
CONCLUSION: The control activities during 2007-2013 has shown significant achievements in reducing echinococcosis in Gannan Tibetan Autonomous Prefecture.