关键词: 寄生虫, 鼠类, 感染, 大理市

Abstract: Objective　To investigate the current prevalence of parasitic infections in murines captured from Dali City, so as to provide insights into improvements in the surveillance and control measures of human parasitic diseases in the city. Methods　 Seven natural villages were sampled from 4 townships in Dali City on November 2023, and murines were captured using murine traps in farmlands, grasslands and ditches neighboring the survey villages and characterized for species. Murines were sacrificed and dissected, and liver specimens were collected for detection of parasite eggs using microscopy. In addition, murine rectal feces were collected, and parasite eggs were identified in fecal samples using Kato⁃Katz technique, and Schistosoma japoninicum infection was detected using miracidial hateching test with nylon gauzes. Results　A total of 126 murines belonging to 12 species were captured, and Crocidura attenuata was the dominant species (34.92%, 44/126), followed by Eothenomys miletus (13.49%, 17/126) and Apodemus chevrier (13.49%, 17/126). A total of 17 murines representing 8 species were detected with parasitic infections, with an overall prevalence rate of 13.49% (17/126). Murine with parasitic infections were distributed in 4 natural villages, with the highest number of infections in C. attenuata (5), followed by in E. miletus (4). A total of 7 species of parasite eggs were detected in captured murines, and the highest prevalence of parasitic infections was seen in Schistosoma sinensium (5.56%, 7/126), followed by in Capillaria hepatica (3.17%, 4/126), S. japonicum (2.38%, 3/126), Strongyloides stercoralis (2.38%, 3/126), hookworm (2.38%, 3/126), Trichuris trichiura (1.59%, 2/126) and Hymenolepis nana (1.59%, 2/126). Mixed infections of S. japonicum, S. sinensium and C. hepatica were detected in one C. attenuata, one Rattus tanezumi and one R. norvegicus captured from the same natural village, with S. japonicum miracidia hatched from R. tanezumi fecal samples, and S. stercoralis and H. nana mixed infections were detected in one C. attenuata. Conclusions　The prevalence of parasitic infections was high in murines in Dali City in 2023, and the murine host animals are diverse and the species of parasites infecting murines are multiple, with a high risk of zoonotic transmission. Early warning and monitoring of parasitic infections, environmental improvements and murine control are recommended for integrated control of parasitic infections in murines.

Key words: Parasite, Murine, Infection, Dali City