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http://dx.doi.org/10.3347/kjp.2020.58.4.445

Identification of Trombiculid Chigger Mites Collected on Rodents from Southern Vietnam and Molecular Detection of Rickettsiaceae Pathogen  

Binh, Minh Doan (Ho Chi Minh Institute of Malariology-Parasitology and Entomology)
Truong, Sinh Cao (Vinh Medical University)
Thanh, Dong Le (Ho Chi Minh Institute of Malariology-Parasitology and Entomology)
Ba, Loi Cao (National Institute of Malariology-Parasitology and Entomology)
Van, Nam Le (Military Hospital 103)
Nhu, Binh Do (Military Hospital 103)
Publication Information
Parasites, Hosts and Diseases / v.58, no.4, 2020 , pp. 445-450 More about this Journal
Abstract
Trombiculid "chigger" mites (Acari) are ectoparasites that feed blood on rodents and another animals. A crosssectional survey was conducted in 7 ecosystems of southern Vietnam from 2015 to 2016. Chigger mites were identified with morphological characteristics and assayed by polymerase chain reaction for detection of rickettsiaceae. Overall chigger infestation among rodents was 23.38%. The chigger index among infested rodents was 19.37 and a mean abundance of 4.61. A total of 2,770 chigger mites were identified belonging to 6 species, 3 genera, and 1 family, and pooled into 141 pools (10-20 chiggers per pool). Two pools (1.4%) of the chiggers were positive for Orientia tsutsugamushi. Ricketsia spp. was not detected in any pools of chiggers. Further studies are needed including a larger number and diverse hosts, and environmental factors to assess scrub typhus.
Keywords
Oriental tsutsugamushi; Rickettsia sp.; chigger mite; ectoparasite;
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