Analysis on the status of human infection in national surveillance sites for clonorchiasis in Xinfeng County during 2016-2019

doi:10.12140/j.issn.1000-7423.2020.05.006

Abstract

Abstract:

Objective To understand the prevalence of Clonorchis sinensis infection in Xinfeng County, so as provide scientific basis for formulating control strategies. Methods The Xinfeng County was divided into 5 areas according to the geographical location, and in each area one village was selected from a township to serve as the surveillance site, including Yu Village of Gubei Town, Zhangtang Village of Datangbu Township, Zhengao Village of Zhengping Township, Huangni Village of Xiniu Township, and Jiaokeng Village of Jiading Township. During 2016 to 2019, no less than 200 permanent residents aged 3 years or above were cluster sampled from each administrative village each year for fecal examination using the modified Kato-Katz thick smrar method (two slide reading/one sample) to estimate the status of Clonorchis infection. In addition, no less than 150 examinees were randomly selected for questionnaire survey on the knowledge, attitude and behavior towards clonorchiasis. Comparison of infection rate between groups was analyzed by chi-square test. Results From 2016 to 2019, the infection rate of C. sinensis was 9.3% (96/1 027), 8.9% (89/1 005), 5.2% (52/1 000) and 6.4% (64/1 002), respectively in each year, and the youngest infected people was at the age of 3, 11, 26 and 27 years, respectively. The infection rate in males was higher than that in females (P < 0.01). No infection was found in preschool children except in 2016, while the infection occurred in all other groups of different education levels in all years. The questionnaire survey indicates that from 2016 to 2019, the proportions of residents eating raw fish was 14.4% (22/153), 16.6% (25/151), 9.3% (14/150) and 18.8% (29/154), respectively. The proportion of residents having heard of clonorchiasis increased from 13.7% (2/153) in 2016 to 55.8% (86/154) in 2019. Conclusion The infection rate of C. sinensis remains high in the national surveillance site in Xinfeng County, and the proportion of residents eating raw fish keeps persistent in the four years.

Key words: Clonorchis sinensis, Surveillance site, Human infection, Analysis

CLC Number:

R532.23

YUAN Chang-hong, LAN Ming-xing, ZHU Ting-jun, WANG Mei, CHEN Zhe, HU Li-feng, HUANG Qi, JIANG Wei-sheng. Analysis on the status of human infection in national surveillance sites for clonorchiasis in Xinfeng County during 2016-2019[J]. CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES, 2020, 38(5): 561-564.

Figures/Tables 2

Table 1

Table 2

References 10

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村Village	2016		2017		2018		2019
村Village	检查人数 No. examined	阳性人数（阳性率/%） No. positive(Positive rate/%)	检查人数 No. examined	阳性人数（阳性率/%） No. positive(Positive rate/%)	检查人数 No. examined	阳性人数（阳性率/%） No. positive(Positive rate/%)	检查人数 No. examined	阳性人数（阳性率/%） No. positive(Positive rate/%)
樟塘Zhangtang	221	33(14.9)	202	25(12.4)	200	35(17.5)	200	26(13.0)
焦坑Jiaokeng	200	49(24.5)	200	56(28.0)	200	17(8.5)	201	33(16.4)
余村Yucun	203	1(0.5)	202	3(1.5)	200	0(0)	201	0(0)
黄泥Huangni	201	3(1.5)	200	1(0.5)	200	0(0)	200	1(0.5)
正坳Zheng’ao	202	9(4.5)	201	4(2.0)	200	0(0)	200	4(2.0)
合计Total	1 027	95(9.3)	1 005	89(8.9)	1 000	52(5.2)	1 002	64(6.4)

特征 Features	2016		2017		2018		2019
特征 Features	检查人数 No. examined	阳性人数（阳性率/%） No. positive(Positive rate/%)	检查人数 No. examined	阳性人数（阳性率/%） No. positive(Positive rate/%)	检查人数 No. examined	阳性人数（阳性率/%） No. positive(Positive rate/%)	检查人数 No. examined	阳性人数（阳性率/%） No. positive(Positive rate/%)
年龄组Age group
<10	155	7(4.5)	231	0(0)	127	0(0)	112	0(0)
10~19	102	11(10.8)	95	6(6.3)	109	0(0)	106	0(0)
20~29	72	9(12.5)	66	5(7.6)	94	2(2.1)	96	3(3.1)
30~39	86	10(11.6)	54	7(13.0)	70	4(5.7)	84	7(8.3)
40~49	174	16(9.2)	164	17(10.4)	181	8(4.4)	178	18(10.1)
50~59	198	21(10.6)	163	24(14.7)	177	17(9.6)	157	17(10.8)
60~69	142	17(12.0)	144	18(12.5)	139	15(10.8)	170	14(8.2)
70~79	98	4(4.1)	88	12(13.6)	103	6(5.8)	99	5(5.1)
性别Gender
男Male	483	58(12.0)	503	62(12.3)	488	33(6.8)	504	42(8.8)
女Female	544	37(6.8)	502	27(5.4)	512	19(3.7)	498	22(4.4)
文化程度Education
文盲Illiteracy	112	6(5.4)	148	18(12.2)	93	5(5.4)	125	4(3.2)
学龄儿童 Preschool children	69	4(5.8)	37	0(0)	19	0(0)	27	0(0)
小学 Primary school	443	27(6.1)	473	27(5.7)	455	24(5.3)	416	24(5.8)
中学 Junior high school	387	52(13.4)	328	44(13.4)	415	22(5.3)	422	34(8.1)
大学University	16	6/16	17	0/17	18	1/18	12	2/12

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