Vector Surveillance

Analysis of surveillance results of cockroaches in Liaoning province, China, 2015-2020

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  • Institute for Infectious and Communicable Disease Control and Prevention, Liaoning Provincial Center for Disease Control and Prevention, Shenyang, Liaoning 110005, China

Received date: 2021-11-01

  Online published: 2022-05-09

Abstract

Objective To master the density, infestation rate, and species composition of cockroaches in Liaoning province, China and analyze the seasonal fluctuation trend of cockroaches, and to provide a scientific basis for the control of cockroaches. Methods The cockroach surveillance data from vector surveillance sites in fourteen cities of Liaoning province from 2015 to 2020 were collected and statistically analyzed using Excel 2010 and SPSS 23.0 softwares. The density and species composition of cockroaches were analyzed, and the density difference and seasonal fluctuation trend of cockroaches in different years and different habitats were compared. Results A total of 47 940 cockroaches were captured in the vector surveillance sites in Liaoning province from 2015 to 2020, with a mean density of 0.52 cockroach/paper and an infestation rate of 10.45%. Blattella germanica was the dominant cockroach species, accounting for 97.91% of the total number of the captured cockroaches. Cockroaches in different habitats showed significant differences in the surveillance density and infestation rate, which were much higher in farm produce markets and supermarkets than in other habitats, followed by in the food and beverage industry, residential areas, hospitals, and hotels. The seasonal fluctuation trend of cockroach density showed a unimodal curve in 2015, 2019, and 2020, a bimodal curve in 2018, a polymodal curve in 2016 and 2017, and a unimodal curve in farm produce markets and the food and beverage industry. The seasonal fluctuation trend of cockroach infestation rate showed a unimodal curve in 2015-2018, a bimodal curve in 2019 and 2020, a bimodal curve in farm produce markets, and a unimodal curve in the food and beverage industry and residential areas. The peaks of cockroach density and infestation rate occurred from July to September. Conclusion The cockroach density in Liaoning province showed a downward firstly and then upward trend from 2015 to 2020, and the infestation rate showed a downward trend. The dominant species was B. germanica. The infestation of cockroaches is serious in key industries including farm produce markets and supermarkets. In combination with the seasonal fluctuation trend of cockroach density and infestation rate, surveillance and control should be strengthened and integrated control measures shall be taken before the peak of cockroach activity (from July to September) to reduce cockroach density and control cockroach-related diseases.

Cite this article

WANG Chun-yu, BAI Yu-yin, ZHANG Jia-yong, DING Jun . Analysis of surveillance results of cockroaches in Liaoning province, China, 2015-2020[J]. Chinese Journal of Vector Biology and Control, 2022 , 33(2) : 225 -229 . DOI: 10.11853/j.issn.1003.8280.2022.02.011

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