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Background  The role of endemic murid rodents as hosts of arthropod vectors of diseases of medical and veterinary significance is well established in the northern hemisphere. In contrast, endemic murids are comparatively understudied as vector hosts in Africa, particularly in South Africa. Considering the great rodent diversity in South Africa, many of which may occur as human commensals, this is unwarranted.    Methods  In the current study we assessed the ectoparasite community of a widespread southern African endemic, the Namaqua rock mouse ( Micaelamys namaquensis ), that is known to carry  Bartonella  spp. and may attain pest status. We aimed to identify possible vectors of medical and/or veterinary importance which this species may harbour and explore the contributions of habitat type, season, host sex and body size on ectoparasite prevalence and abundance.    Results  Small mammal abundance was substantially lower in grasslands compared to rocky outcrops. Although the small mammal community comprised of different species in the two habitats,  M. namaquensis  was the most abundant species in both habitat types. From these 23 ectoparasite species from four taxa (fleas, ticks, mites and lice) were collected. However, only one flea ( Xenopsylla brasiliensis ) and one tick species ( Haemaphysalis elliptica ) have a high zoonotic potential and have been implicated as vectors for  Yersinia pestis  and  Bartonella  spp. and  Rickettsia conorii , respectively. The disease status of the most commonly collected tick ( Rhipicephalus distinctus ) is currently unknown. Only flea burdens differed markedly between habitat types and increased with body size. With the exception of lice, all parasite taxa exhibited seasonal peaks in abundance during spring and summer.    Conclusion   M. namaquensis  is the dominant small mammal species irrespective of habitat type. Despite the great ectoparasite diversity harboured by  M. namaquensis , only a small number of these are known as vectors of diseases of medical and/or veterinary importance but occur at high prevalence and/or abundance. This raises concern regarding the potential of this host as an endemic reservoir for zoonotic diseases. Consequently, additional sampling throughout its distributional range and research addressing the role of  M. namaquensis  as a reservoir for zoonotic diseases in southern Africa is urgently needed.

parasites and vectors

The Namaqua rock mouse (Micaelamys namaquensis) as a potential reservoir and host of arthropod vectors of diseases of medical and veterinary importance in South Africa