Long-Term Trend Analysis of Major Human Helminth Infections - Guangdong Province, China, 1988-2021.

Introduction: Although helminth infections threaten millions of people worldwide, the spatiotemporal characteristics remain unclear across China. This study systematically describes the spatiotemporal changes of major human helminth infections and their epidemiological characteristics from 1988 to 2021 in Guangdong Province, China.

Methods: The survey data in Guangdong Province were primarily obtained from 3 national surveys implemented during 1988-1992, 2001-2004, and 2014-2016, respectively, and from the China Information System for Disease Control and Prevention during 2019-2021.

Control of the Invasive Agricultural Pest with a Novel Molluscicide: Efficacy and Safety to Nontarget Species.

The golden apple snail is an invasive pest that causes extensive damage to agricultural production. is also an intermediate host of , which causes human eosinophilic meningitis. In this study, the molluscicidal activity and safety profile of a novel molluscicide PBQ [1-(4-chlorophenyl)-3-(pyridin-3-yl)urea] were evaluated.

Reappearance of Risk of Schistosomiasis Transmission and the Response After 27 Years of Interrupted Transmission - Guangdong Province, China, 2019.

What Is Already Known About This Topic?: No live specimens of the snail () and indigenous infected cases of schistosomiasis japonicum have been found in Guangdong Province since 1993, but live was found again in 2019. This study conducted identification and elimination.

What Is Added By This Report?: In 2019, live specimens were detected by routine surveillance in areas in Qujiang of Shaoguan City and Yingde of Qingyuan City, and an emergency response was launched immediately.

Comparative proteomics suggests the mode of action of a novel molluscicide against the invasive apple snail Pomacea canaliculata, intermediate host of Angiostrongylus cantonensis.

Angiostrongylus cantonensis is a zoonotic parasitic nematode that is the most common cause of human eosinophilic meningitis. The invasive apple snail Pomacea canaliculata is an important intermediate host of A. cantonensis and contributes to its spread.

Malaria Surveillance of Entry People During the COVID-19 Epidemic - Guangdong Province, China, October 2020-May 2021.

What Is Already Known About This Topic?: Malaria control was affected by the coronavirus disease 2019 (COVID-19) pandemic. This study conducted active case finding for key flights and key populations to determine malaria transmission.

What Is Added By This Report?: Surveillance for malaria was conducted for entry personnel coming from areas affected by malaria.

The potential risk of Schistosoma mansoni transmission by the invasive freshwater snail Biomphalaria straminea in South China.

Schistosomes infect more than 200 million people worldwide, and globally, over 700 million people are at risk of infection. The snail Biomphalaria straminea, as one of the intermediate hosts of Schistosoma mansoni, consecutively invaded Hong Kong in 1973, raising great concern in China. In this study, a malacological survey was conducted over a period of four years, and investigations were performed on the mechanism of susceptibility of B.

The control of clonorchiasis in Guangdong province, southern China.

Oriental liver fluke disease (clonorchiasis), caused by Clonorchis sinensis, is endemic in 81 counties in Guangdong province, China. This study was conducted following increasing lack of clonorchiasis awareness and increased consumption of raw freshwater fish and raw fish porridge at home and restaurants, which has been attributed to improved living standards in China, and is considered to have led to a higher C. sinensis infection rate in the country.

Spatial distribution and habitat suitability of Biomphalaria straminea, intermediate host of Schistosoma mansoni, in Guangdong, China.

Background: Biomphalaria straminea is an invasive vector in China, posing a significant threat to public health. Understanding the factors affecting the establishment of this snail is crucial to improve our ability to manage its dispersal and potential risk of schistosomiasis transmission. This study sought to determine the spatial distribution of B.

Prediction of the potential global distribution for Biomphalaria straminea, an intermediate host for Schistosoma mansoni.

Background: Schistosomiasis is a snail-borne parasitic disease and is endemic in many tropical and subtropical countries. Biomphalaria straminea, an intermediate host for Schistosoma mansoni, is native to the southeastern part of South America and has established in other regions of South America, Central America and southern China during the last decades. S.

Discovery of the pyridylphenylureas as novel molluscicides against the invasive snail Biomphalaria straminea, intermediate host of Schistosoma mansoni.

Background: The snail Biomphalaria straminea is one of the intermediate hosts of Schistosoma mansoni. Biomphalaria straminea is also an invasive species, known for its strong capability on peripheral expansion, long-distance dispersal and colonization. Using molluscicides to control snail populations is an important strategy to interrupt schistosomiasis transmission and to prevent the spread of the invasive species.

[Diagnosis and Treatment of the First Imported Case of Plasmodium knowlesi Infection in China].

Objective: To diagnose and treat the first imported active case of Plasmodium knowlesi infection in China.

Methods: The clinical information of the patient was collected. Microscopy of blood smear was conducted after Giemsa staining.

[Epidemic situation and prevention and control strategy of clonorchiasis in Guangdong Province, China].

Clonorchiasis is one of the food-borne parasitic diseases. Adult parasites live in the human liver and gallbladder tube system, causing serious complications, such as gallstones, cholecystitis and cholangitis, and even bile duct cancer. The disease is very popular in our country, and the population infection rate is high.

Risk factors for Enterobius vermicularis infection in children in Gaozhou, Guangdong, China.

Background: Enterobius vermicularis infection is a prevalent intestinal parasitic disease in children. In this study, we explored the epidemiological status and risk factors for E. vermicularis infection in children in southern China.

[Survey of distribution of Enterobius vermicularis infection of children in Huadu District, Guangzhou City].

Objective: To understand the status of Enterobius vermicularis infection of children in Huadu District, Guangzhou City so as to provide the evidence for improving the control work.

Methods: In 2012, 24 kindergartens and 24 primary schools were selected as survey sites by the stratified random sampling method and 200 or more children aged below 10 years per site were investigated for the Enterobius vermicularis infection by the cellophane tape method. The relevant influencing factors (environment conditions, sanitary facilities and management system, and health habits of families and individuals) were surveyed with questionnaire, and all the data were analyzed statistically with the Excel software.

An outbreak of angiostrongyliasis in Guanging, People's Republic of China: migrants vulnerable to an emerging disease.

Angiostrongyliasis has been frequently reported from the People's Republic of China during the last decade. An outbreak of angiostrongyliasis among migrant laborers in Guangning, Guangdong Province is described here. A questionnaire was developed to collect epidemiological and clinical information about 17 migrant laborers from the Bai ethnic group in Dali, Yunnan Province.

[Endemic situation of schistosomiasis in Guangdong Province from 2004 to 2009].

Objective: To understand the endemic situation of schistosomiasis in Guangdong Province.

Methods: The surveillance of Oncomelania hupensis snails and infectious sources was carried out in the former endemic areas, and the surveillance data were statistically analyzed from 2004 to 2009 according to the national and provincial surveillance protocols.

Results: From 2004 to 2009, an area of 927.

[Investigation on Angiostrongylus cantonensis infection in rodents in Guangdong Province].

Objective: To investigate the natural infection of Angiostrongylus cantonensis in Guangdong Province, and to provide the scientific evidence for control measures.

Methods: The investigation was carried out in 56 villages of 28 towns of 28 counties/districts in East Guangdong, West Guangdong, the mountain area of North Guangdong and Peal River Delta of the Province from 2005 to 2010. The rodents were captured with live trap and the species identified.

First provincial survey of Angiostrongylus cantonensis in Guangdong Province, China.

The rat lungworm Angiostrongylus cantonensis is a zoonotic nematode with a wide distribution. We report the first provincial survey of the prevalence of A. cantonensis infection among wild rodents and snails in Guangdong Province, China.

[Survey on the focus of Angiostrongylus cantonensis in Guangdong Province].

Objective: To understand the distribution of Angiostrongylus cantonensis foci in Guangdong Province for making surveillance program.

Methods: Survey sites were chosen by strata sampling according to different geographic locations. Totally 22 survey sites were selected in four regions: East Guangdong, West Guangdong, North Guangdong and the Pearl River Delta.

[Follow-up survey on the imported cases of lymphatic filariasis in Guangdong Province].

Objective: To make a survey on the possible imported cases with microfilaremia from a recently identified outbreak focus in Fuchuan County of Guangxi Region.

Methods: Moving people as temporary laborers from Guangxi and periphery residents were screened by thick blood smears for microfilariae and ELISA for specific IgG4 in Sept 2007.

Results: 989 persons in cities/districts of Nansha, Panyu, Shantou and Zhongshan were investigated.

[Effect of influenza-like diseases on the number of outpatient visits].

Objective: To estimate the effect of influenza-like illness (ILI) on outpatient visits and assess its impact on public health.

Methods: We analyzed the data of weekly number of ILI and outpatient visits in Departments of Internal Medicine, Pediatrics and Emergency at two influenza surveillance hospitals during a period of 137 weeks in Guangzhou. Spectral analysis and time-series analysis were performed to evaluate the variation of outpatient visits over time.

[An epidemiological study on the index cases of severe acute respiratory syndrome occurred in different cities among Guangdong province].

Objective: To analyze the epidemiological features of the index cases of severe acute respiratory syndrome (SARS) occurred in different cities in Guangdong province and to trace for the source of infection.

Methods: Standardized individual case inventory was adopted to conduct investigation on index cases and on persons who had close contact with index cases in Guangdong province. Data on the epidemiological characteristics, secondary cases and the links among index cases were analyzed.