Surveillance of echinococcosis in Ningxia in 2020

doi:10.12140/j.issn.1000-7423.2022.02.017

Abstract

Abstract:

In order to understand the surveillance results and epidemic characteristics of echinococcosis in Ningxia, the prevalence of echinococcosis among the residents over 3 years old in 3 type Ⅰ epidemic areas, 9 type Ⅱ epidemic areas and 7 type Ⅲ epidemic areas in Ningxia was examined by ultrasound imaging method in 2020. Echinococcus infection in dogs was detected by ELISA. The infection of hydatid cyst in the liver, lung and abdominal cavity of cattle, sheep and mice was observed by autopsy and physical examination. A total of 30 700 persons were examined, with a detection rate of 0.09% (28/30 700). The detection rates of type Ⅰ, Ⅱand Ⅲ were 0.39% (12/3 046), 0 (0/9 938) and 0.09% (16/17 716), respectively. Echinococcosis was detected only in Xiji County and Zhongning County in type Ⅰ epidemic areas, with a detection rate of 0.79% (8/1 013) and 0.39% (4/1 033), respectively. Echinococcosis patients were detected only in Jinfeng District, Haiyuan County and Pingluo County in type Ⅲ epidemic areas, with a detection rate of 0.25% (5/2 038), 0.20% (10/5 101) and 0.02% (1/4 358), respectively. The majority of cases were male and 50-59 age group, accounting for 64.29% (18/28) and 42.86% (12/28), respectively. A total of 19 727 children were screened in 57 primary schools in 19 endemic areas. No children with echinococcosis were detected. A total of 13 549 feces samples were tested in 19 counties, with an infection rate of 0.89% (121/13 549). The infection rate of domestic dogs in different areas was significantly different (χ² =62.59, P < 0.05). A total of 670 feces from street dogs were tested in the 3 type Ⅰ epidemic areas, and the infection rate was 2.69% (18/670), which was higher than that of domestic dogs (0.89%, 121/13 549) (χ² = 21.21, P < 0.05). A total of 6 017 sheep were monitored and the infection rate was 0.83% (50/6 017). The infection rate among cattle was 0.08% (3/3 915). The infection rate among sheep was higher than that of cattle (χ² = 25.43, P < 0.05). No echinococcus multilocularis were detected in 1 507 rodent samples. It is suggested that the echinococcosis epidemic areas in Ningxia should be redefined according to the criteria of the National Echinococcosis Surveillance Program (2020 Edition). Increase population screening in key areas, strengthen sheep monitoring, and carry out monitoring, deworming and management of ownerless dogs.

Key words: Echinococcosis, Surveillance, Ningxia

CLC Number:

R532.32

WU Xiang-lin, YAN Fang, DUAN Hong-ju, QI Rong-ting, GAO Jian-wei. Surveillance of echinococcosis in Ningxia in 2020[J]. CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES, 2022, 40(2): 242-246.

Figures/Tables 4

References 16

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县（市、区）	检查人数	检出人数	检出率/%
Ⅰ类流行区
西吉	1 013	8	0.79
原州	1 000	0	0
中宁	1 033	4	0.39
Ⅱ类流行区
贺兰	1 071	0	0
西夏	1 020	0	0
利通	1 002	0	0
同心	1 781	0	0
盐池	1 000	0	0
青铜峡	1 000	0	0
红寺堡	1 049	0	0
彭阳	1 015	0	0
隆德	1 000	0	0
Ⅲ类流行区
金凤	2 038	5	0.25
永宁	1 010	0	0
灵武	1 482	0	0
平罗	4 358	1	0.02
泾源	1 712	0	0
沙坡头	2 015	0	0
海原	5 101	10	0.20
合计	30 700	28	0.09

年龄组/岁	检查人数	检出人数	检出率/%
0~9	671	0	0
10~19	1 871	0	0
20~29	3 625	0	0
30~39	3 910	0	0
40~49	4 595	6	0.13
50~59	5 480	12	0.22
≥ 60	10 548	10	0.09
合计	30 700	28	0.09

县（市、区）	检查数	感染数	感染率/%
Ⅰ类流行区
西吉	2 970	61	2.05
原州	1 490	4	0.27
中宁	1 403	17	1.21
Ⅱ类流行区
贺兰	600	4	0.67
西夏	50	0	0
利通	1 020	0	0
同心	205	2	0.98
盐池	1 020	9	0.88
青铜峡	60	5	8.33
红寺堡	650	2	0.31
彭阳	272	0	0
隆德	470	3	0.64
Ⅲ类流行区
金凤	300	1	0.33
永宁	200	0	0
灵武	620	3	0.48
平罗	810	0	0
泾源	600	0	0
沙坡头	200	0	0
海原	609	10	1.64
合计	13 549	121	0.89

县（区）	羊		牛
县（区）	检查数	感染数（感染率/%）	检查数	感染数（感染率/%）
Ⅰ类流行区
西吉	1 015	38（3.74）	-
原州	-		500	3（0.60）
中宁	-		325	0（0）
Ⅱ类流行区
贺兰	-		500	0（0）
西夏	-		135	0（0）
利通	999	0（0）	-
同心	-		500	0（0）
盐池	1 000	4（0.40）	-
青铜峡	1 000	0（0）	-
红寺堡	-		305	0（0）
彭阳	-		302	0（0）
隆德	-		50	0（0）
Ⅲ类流行区
金凤	-		105	0（0）
永宁	-		300	0（0）
灵武	-		500	0（0）
平罗	1 003	8（0.80）	-
泾源	-		300	0（0）
沙坡头	1 000	0（0）	-
海原	-		93	0（0）
合计	6 017	50（0.83）	3 915	3（0.08）