CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES ›› 2021, Vol. 39 ›› Issue (3): 332-336.doi: 10.12140/j.issn.1000-7423.2021.03.018

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Analysis of characteristics of echinococcosis patients in Shiqu County at different time periods

LIAO Sha(), YU Wen-jie, ZHANG Guang-jia, HE Wei, WANG Qi, LI Tiao-ying, CHEN Xing-wang, WANG Qian*()   

  1. Institute of Parasitic Diseases, Sichuan Provincial Center for Disease Control and Prevention, Chengdu 610041, China
  • Received:2020-12-31 Revised:2021-02-02 Online:2021-06-30 Published:2021-07-05
  • Contact: WANG Qian E-mail:liaoshalisa@foxmail.com;wangqian1967@163.com
  • Supported by:
    Science and Technology Projects of Sichuan Province(2018SZ0116)

Abstract:

Mass screening for echinococcosis was conducted in the administrative villages in 7 and 8 towns in Shiqu county using the random cluster sampling method from 2000 to 2002 and from 2014 to 2017. Ultrasonographic imaging and serological tests were applied to diagnose echinococcosis. The sex, age, lesion size and classification of patients were compared between the two time periods. A total of 416 and 2 090 echinococcosis patients were investigated during 2000—2002 and 2014—2017, respectively. The proportion of cystic echinococcosis (CE) patients in Shiqu county decreased from 51.9% (216/416) in 2000—2002 to 39.8% (832/2 090) in 2014—2017, while the proportion of alveolar echinococcosis (AE) patients increased from 48.1% (200/416) in 2000—2002 to 57.4% (1 200/2 090) in 2014—2017 (P < 0.05). The proportions of CL, CE1 and CE2 type patients decreased from 2.4% (10/416), 18.0% (75/416) and 13.0% (54/416) in 2000—2002 to 0.7% (14/2 090), 4.6% (96/2 090) and 6.0% (125/2 090) in 2014—2017 ( P < 0.05). The proportions of CE3, CE4 and CE5 patients increased from 5.5% (23/416), 11.5% (48/416) and 1.4% (6/416) in 2000—2002 to 11.1% (232/2 090), 14.1% (294/2 090) and 3.4% (71/2 090) in 2014—2017, respectively ( P < 0.05). The proportion of AE patients with calcification and nodular increased from 10.3% (43/416) in 2000—2002 to 21.2% (444/2 090) in 2014—2017, while the proportion of AE patients with central necrosis lesion decreased from 18.3% (76/416) in 2000—2002 to 13.6% (284/2 090) in 2014—2017 ( P < 0.05); meanwhile, the proportion of AE patients with lesion diameter < 5 cm increased from 15.1% (63/416) in 2000—2002 to 25.7% (523/2 032) in 2014—2017 ( P < 0.05). The proportion of CE patients aged 21 to 30 years decreased from 2000—2002 (10.6%, 44/416) to 2014—2017 (4.5%, 92/2 032)( P < 0.05), and the proportion of CE patients aged 41-50 years and over 60 years increased from 2000—2002(8.7%, 36/416; 5.3%, 22/416) to 2014—2017(9.8%, 199/2 032; 6.9%, 141/2 032), respectively ( P < 0.05). After more than 10 years’ comprehensive prevention and control for echinococcosis in Shiqu county, the proportion of the patients showed changes with the CE type decreased and AE type increased, and correspondently, changes were seen in the composition of patients with different lesion classifications and sizes, and ages.

Key words: Shiqu County, Echinococcosis, Patients, Characteristics

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