Analysis on the results of surveillance of Enterobius vermicularis infection among children in rural areas in Jiangxi Province during 2016-2019

doi:10.12140/j.issn.1000-7423.2020.05.003

Abstract

Abstract:

Objective To understand the status and the changing trend of Enterobius vermicularis infection in children in Jiangxi Province during 2016-2019, and to provide scientific basis for formulating control strategies in the province. Methods Surveillance sites of soil-transmitted helminth (STH) were set up in 83 counties (cities and districts) in Jiangxi Province during 2016-2019. Children aged 3-9 years were examined for Enterobius vermicularis infection by the modified Kato-Katz thick smearmethod (two slide reading/one fecal sample) and the adhesive cellophane anal swab method. The SPSS 25.0 statistical software was used to perform statistical description, comparison and trend analysis on the data. Results A total of 32 587 children were examined in 2016-2019, revealing a prevalence of E. vermicularis infection of 10.2% (931/9 155), 12.8% (1 045/8 145), 13.1% (964/7 343) and 10.5% (836/7 944), respectively, in each year, showing a trend of first increase and then decrease (P > 0.05). The average infection rate in children remained ≥ 10% in 4 consecutive years in Xinyu, Jiujiang, Ganzhou and Fuzhou Cities, among them the Xinyu City had the highest infection in each year: 17.4% (8/46), 24.0% (6/25), 32.3% (10/31) and 22.2% (12/54), respectively. The infection rate was comparable between males and females [10.1% (506/4 989) and 10.2% (425/4 166) in 2016, 13.0% (568/4 383) and 12.7% (477/3 762) in 2017, 13.3% (530/3 981) and 12.9% (434/3 362) in 2018, 10.3% (440/4 283) and 10.8% (396/3 661) in 2019, respectively; P > 0.05]. The infection rate among nonboarding children was highest (13.7%, 83/606), whereas in all other years, the kindergarten children had the highest infection rate [13.8% (512/3 705), 16.3% (567/3 486) and 12.3% (477/3 885), respectively]. The infection rate was relatively higher in children aged 4-7, which remained≥ 10% in all years. The detection rate using adhesive cellophane anal swab method was 11.4% (3 730/32 587), significantly higher than the 1.2% (392/32 587) using Kato-Katz thick smear method. Conclusion A higher prevalence of E. vermicularis infection was found among children in Jiangxi Province in 2016-2019, with no significant difference between years. It is necessary to strengthen surveillance and appropriate control for kindergarten children.

Key words: Enterobius vermicularis, Children, Infection, Surveillance, Jiangxi Province

CLC Number:

R532.13

CHEN Zhe, JIANG Wei-sheng, GE Jun, DAI Kun-jiao, LI Dong, LIU Ke-xing, ZENG Xiao-jun. Analysis on the results of surveillance of Enterobius vermicularis infection among children in rural areas in Jiangxi Province during 2016-2019[J]. CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES, 2020, 38(5): 542-547.

Figures/Tables 4

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Fig. 1

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References 18

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市 City	监测点数No. surveillance sites	2016			2017			2018			2019
市 City	监测点数No. surveillance sites	检查人数No. examined	感染人数No.infected	感染率/%Infection rate/%	检查人数No. examined	感染人数No.infected	感染率/%Infection rate/%	检查人数No. examined	感染人数No.infected	感染率/%Infection rate/%	检查人数No. examined	感染人数No.infected	感染率/%Infection rate/%
南昌Nanchang	5	516	32	6.2	346	48	13.9	293	64	21.8	345	30	8.7
抚州Fuzhou	10	1 225	126	10.3	821	89	10.8	889	102	11.5	845	87	10.3
鹰潭Yingtan	2	207	9	4.3	298	12	4.0	212	13	6.1	195	16	8.2
萍乡Pingxiang	4	390	3	0.8	350	24	6.9	410	19	4.6	342	28	8.2
景德镇Jingdezhen	3	179	5	2.8	245	15	6.1	202	7	3.5	97	12	12.4
新余Xinyu	1	46	8	17.4	25	6	24.0	31	10	32.3	54	12	22.2
上饶Shangrao	11	1 082	165	15.2	1 171	151	12.9	849	96	11.3	895	74	8.3
宜春Yichun	9	1 298	99	7.6	903	79	8.7	689	64	9.3	856	61	7.1
吉安 Ji’an	12	1 522	110	7.2	1 207	202	16.7	1 376	171	12.4	1 409	167	11.9
九江Jiujiang	11	1 135	172	15.2	1 137	165	14.5	1 020	169	16.6	1 217	163	13.4
赣州Ganzhou	15	1 555	202	13.0	1 642	254	15.5	1 372	249	18.1	1 689	186	11.0
合计 Total	83	9 155	931	10.2	8 145	1 045	12.8	7 343	964	13.1	7 944	836	10.5

特征Features	2016			2017			2018			2019
特征Features	检查人数No. examined	感染人数No. infected	感染率/%Infection rate/%	检查人数No. examined	感染人数No. infected	感染率/%Infection rate/%	检查人数No. examined	感染人数No. infected	感染率/%Infection rate/%	检查人数No. examined	感染人数No. infected	感染率/%Infection rate/%
性别Gender
男Male	4 989	506	10.1	4 383	568	13.0	3 981	530	13.3	4 283	440	10.3
女Female	4 166	425	10.2	3 762	477	12.7	3 362	434	12.9	3 661	396	10.8
教育时期 Education period
幼托儿童 Kindergarten children	4 174	461	11.0	3 705	512	13.8	3 486	567	16.3	3 885	477	12.3
散居儿童 Nonboarding children	606	83	13.7	882	116	13.2	543	53	9.8	467	16	3.4
学生 Students	4 375	387	8.8	3 558	417	11.7	3 314	344	10.4	3 592	343	9.5
年龄/岁Age/Years
3	1 184	104	8.8	1 168	137	11.7	1 184	120	8.8	1 178	100	8.5
4	1 401	158	11.3	1 348	195	14.5	1 401	176	11.3	1 222	139	11.4
5	1 590	200	12.6	1 646	233	14.2	1 590	255	12.6	1 439	176	12.2
6	1 472	182	12.4	1 249	175	14.0	1 472	167	12.4	1 213	155	12.8
7	1 215	129	10.6	944	126	13.3	1 215	88	10.6	1 083	114	10.5
8	1 283	99	7.7	967	102	10.5	1 283	101	7.7	1 005	89	8.9
9	1 010	59	5.8	823	77	9.4	1 010	57	5.8	804	63	7.8
合计Total	9 155	931	10.2	8 145	1 045	12.8	7 343	964	13.1	7 944	836	10.5

胶纸肛拭法Adhesive cellophane anal swab method	改良加藤厚涂片法 Modified Kato-Katz thick smear method		合计Total
胶纸肛拭法Adhesive cellophane anal swab method	阳性Positive	阴性Negtive	合计Total
阳性Positive	346	3 384	3 730
阴性Negtive	46	28 811	28 857
合计Total	392	32 195	32 587