关键词: 恙螨宿主, 带恙螨指数, 部队营区

Abstract: Objective To determine the chigger mite species (including dominant species) and their hosts within and around the military camps in Shandong province, China and to provide a scientific basis for prevention of tsutsugamushi disease. Methods All chigger mites were collected from the earlaps and auricular fossae of rodents within and around the military camps in Shandong province; mite specimens were made with Hoyer’s fluid and then identified under a microscope. Results A total of 937 rodents were captured within and around the military camps of the 17 prefecture?level cities in Shandong province during 1990-2010. These rodents belonged to 9 species, 5 genera, and 3 families of Rodentia and 1 species of Insectivora. Rattus norvegicus (55.60%) was the dominant species. Apodemus agrarius had the highest chigger index (15.90) and carried the most species of chigger mites (9 species). In total, 8917 chigger mites, which belonged to 10 species and 7 genera, were collected and identified. Walchia fragilis was the dominant species (37.24%) and found in all military camps. Seven species of chigger mites were identified from Leptotrombidium, and they accounted for 43.75% of all chigger mites. Conclusion There are many species of chigger mite hosts within and around the military camps in Shandong province, and deratization is an importance measure for prevention of tsutsugamushi disease.

Key words: Chigger mite host, Chigger index, Military camp