Analysis of notifiable parasitic diseases cases reported to the National Notifiable Infectious Disease Reporting System in Anhui Province from 2013 to 2023

doi:10.12140/j.issn.1000-7423.2025.01.014

Abstract

Abstract:

Objective To investigate the notifiable parasitic diseases reported to the National Notifiable Infectious Disease Reporting System (NNIDRS) in Anhui Province from 2013 to 2023, and to analyze their epidemiological characteristics. Methods The demographic and clinical characteristics of cases with six notifiable parasitic diseases, including amoebic dysentery, schistosomiasis, malaria, visceral leishmaniasis, echinococcosis, and filariasis, and with current address in Anhui Province during the period from January 1, 2013, to December 31, 2023, were captured from the China Information System for Disease Control and Prevention. The temporal, spatial and population distributions of reported cases with six notifiable parasitic diseases, and the proportion of timely case reporting were analyzed with a descriptive epidemiological method, and the interval between disease diagnosis and case reporting to the NNIDRS was compared among groups with chi-square test, Fisher’s exact test, and Wilcoxon rank-sum test. Results A total of 25 699 cases with notifiable parasitic disease were reported in Anhui Province from 2013 to 2023, including 24 536 cases with schistosomiasis, 1 072 cases with malaria, 50 cases with amoebic dysentery, 6 cases with visceral leishmaniasis, 35 cases with echinococcosis, and no cases with filariasis were reported. The average annual incidence of notifiable parasitic diseases was 3.79/100 000 in Anhui Province from 2013 to 2023, and the annual incidence appeared an overall tendency towards a decline during the 11-year period. The incidence of notifiable parasitic diseases was higher among men (4.26/100 000) than among women (3.32/100 000) (χ² = 398.302, P < 0.05), and there were 60.96% (15 667/25 699) of cases with ages of 40 to 59 years. Farmer was the predominant occupation (92.70%, 23 824/25 699), and the incidence of notifiable parasitic diseases peaked during the period from June to November (76.26%, 19 598/25 699). The highest proportion of schistosomiasis cases was found in Anqing City (32.18%, 7 896/24 536), and the greatest proportion of malaria cases was recorded in Hefei City (52.15%, 559/1 072). The median interval between disease diagnosis and case reporting to the NNIDRS was 4.61 h, and the lowest percentage of timely case reporting was seen for echinococcosis (97.14%, 34/35). In addition, there were significant differences in the interval between disease diagnosis and case reporting (H = 26.559, P < 0.05) and the percentage of timely case reporting in terms of types of notifiable parasitic disease (χ² = 17.204, P < 0.05). Conclusion The prevalence of notifiable parasitic diseases was low in Anhui Province from 2013 to 2023, with middle-aged and elderly male farmers as high-prevalence populations. In addition, there was a region-specific incidence rate of notifiable parasitic diseases, and the proportion of echinococcosis cases reporting to the NNIDRS was low.

Key words: Notifiable parasitic disease, Network reporting system, Epidemiological characteristic, Anhui Province

CLC Number:

TENG Xuejiao, HUANG Hao, ZHU Jianhui, ZHONG Chen, CHEN Chen, WU Jiabing, DENG Shu. Analysis of notifiable parasitic diseases cases reported to the National Notifiable Infectious Disease Reporting System in Anhui Province from 2013 to 2023[J]. CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES, 2025, 43(1): 91-96.

Figures/Tables 3

Table 1

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Table 3

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年份 Year	血吸虫病 Schistosomiasis		疟疾 Malaria		阿米巴痢疾 Amebic dysentery		内脏利什曼病 Visceral leishmaniasis		棘球蚴病 Echinococcosis		合计^a Total^a
年份 Year	病例数 No. cases	发病率 /（10万）^-1 Appearance rate /100 000^-1	病例数 No. cases	发病率 /（10万）^-1 Appearance rate /100 000^-1	病例数 No. cases	发病率 /（10万）^-1 Appearance rate /100 000^-1	病例数 No. cases	发病率 /（10万）^-1 Appearance rate /100 000^-1	病例数No. cases	发病率 /（10万）^-1 Appearance rate /100 000^-1	病例数 No.cases	发病率 /（10万）^-1 Appearance rate /100 000^-1
2013	74	0.123	194	0.324	7	0.012	1	0.002	4	0.013	280	0.468
2014	57	0.095	151	0.250	8	0.013	0	0	6	0.020	222	0.368
2015	24 272^b	39.902	131	0.215	1	0.002	0	0	1	0.003	24 405	40.121
2016	30	0.049	146	0.238	8	0.013	0	0	3	0.010	187	0.304
2017	15	0.024	99	0.160	5	0.008	2	0.003	6	0.020	127	0.205
2018	28	0.045	102	0.163	8	0.013	0	0	1	0.003	139	0.222
2019	37	0.059	102	0.161	6	0.009	0	0	6	0.019	151	0.239
2020	22	0.035	34	0.053	4	0.006	0	0	5	0.016	65	0.102
2021	1	0.002	19	0.031	2	0.003	2	0.003	0	0	24	0.039
2022	0	0	19	0.031	0	0	0	0	2	0.007	21	0.034
2023	0	0	75	0.122	1	0.002	1	0.002	1	0.003	78	0.127
合计Total	24 536	3.623	1 072	0.158	50	0.007	6	0.001	35	0.010	25 699	3.794

特征 Characteristics	血吸虫病 Schistosomiasis	疟疾 Malaria	阿米巴痢疾 Amebic dysentery	内脏利什曼病 Visceral leishmaniasis	棘球蚴病 Echinococcosis	合计^a Total^a
性别 Sex
男 Male	13 505	1 047	25	5	19	14 601
女 Female	11 031	25	25	1	16	11 098
年龄组/岁 Age group/Year
≤ 19	304	6	8	1	6	325
20~39	3 593	446	16	2	13	4 070
40~59	15 033	608	12	2	12	15 667
60~79	5 540	12	12	1	4	5 569
≥ 80	66	0	2	0	0	68
职业 Occupation
农民 Farmer	23 403	379	26	0	16	23 824
家务及待业 Housework and unemployment	117	55	8	2	6	188
散居及幼托儿童 Scattered children and children in daycare or kindergarten	5	0	8	0	5	18
商业服务 Business services	37	74	2	0	2	115
工人 Worker	80	203	2	1	1	287
民工 Migrant worker	13	191	1	0	0	205
渔（船）民 Fisherfolk	490	0	0	0	0	490
学生 Student	193	4	0	1	0	198
其他 Other	198	166	3	2	5	374

特征 Characteristics	血吸虫病 Schistosomiasis	疟疾 Malaria	阿米巴痢疾 Amebic dysentery	内脏利什曼病 Visceral leishmaniasis	棘球蚴病 Echinococcosis	小计/中位数 Total/Median	χ²/H，P值 χ²/H, P value
诊断类型 Diagnostic type
临床诊断病例数/例 No. clinical diagnostic case	24 505	0	29	2	20	24 556	24 450.818, P < 0.05
确诊病例数/例 No. confirmed cases	31	1 072	21	4	15	1 143	24 450.818, P < 0.05
诊断至报告时间间隔/h Diagnosis-to-reporting interval/h	4.61 (1.49, 6.84)	5.08 (1.10, 16.13)	5.16 (1.94, 15.70)	8.93 (4.37, 17.51)	7.20 (1.84, 21.10)	4.61 (1.48, 6.93)	26.559^a, P < 0.05
报告及时性/% Reporting timeliness/%	99.94 (24 521/24 536)	99.81 (1 070/1 072)	100 (50/50)	6/6	97.14 (34/35)	99.93 (25 681/25 699)	17.204^b, P < 0.05