Spotted Fever Group Rickettsia in Dogs in Japan

Morita, Çhiharu; Tsuboi, Yoshimasa; Iida, Akihiro; Mohri, Satoshi; Handa, Sumio; Fukui, Masanobu

doi:10.7883/yoken1952.42.143

Cited by 16 publications

(13 citation statements)

References 3 publications

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“…The result of our study was similar to a previous study in Shimane Prefecture (18.3%) [4] and Shikoku (12.7%) [9]; both are known as endemic area. Rickettsia japonica is highly pathogenic to man for Japanese Spotted Fever in Japan and it is transmitted mainly by Haemaphysalis spp.…”

supporting

confidence: 91%

Survey of Tick-Borne Diseases in Dogs Infested with Rhipicephalus sanguineus at a Kennel in Okayama Prefecture, Japan.

Inokuma

Yamamoto

Morita

1998

The Journal of Veterinary Medical Science

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ABSTRACT. Serological tests were performed to investigate extent of tick-borne diseases in dogs infested with Rhipicephalus sanguineus at a kennel in Okayama Prefecture. Three of 22 dogs (13.6%) were positive for Ehrlichia canis. Two of 19 dogs (10.5%) were positive for Rickettsia japonica. Three of 22 dogs (13.6%) were positive for Babesia gibsoni. None of these animals were positive for Coxiella burnetii or Hepatozoon canis. A microfilaria was detected in a drop smear of hemolymph from an engorged female tick, however species was not determined. It is possible that these ticks can transmit pathogens to domestic dogs which are rare in Japan. -KEY WORDS: canine, Rhipicephalus sanguineus, tick-borne disease.

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confidence: 91%

Survey of Tick-Borne Diseases in Dogs Infested with Rhipicephalus sanguineus at a Kennel in Okayama Prefecture, Japan.

Inokuma

Yamamoto

Morita

1998

The Journal of Veterinary Medical Science

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“…The IFA test was performed as described by Morita and others. 4 Sera were serially diluted 2-fold with PBS. The antibodies were detected in fluorescein isothiocyanate-conjugated goat anti-human Ig A ϩ IgM ϩ IgG (Organon Teknika Corp., Durham, NC).…”

mentioning

confidence: 99%

Short report: prevalence of antibodies against spotted fever, murine typhus, and Q fever rickettsiae in humans living in Zambia.

Okabayashi

Hasebe²,

Samui³

et al. 1999

Am J Trop Med Hyg

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Abstract. The causative agents of rickettsial diseases (Rickettsia conorii, R. typhi, and Coxiella burnetii) have been reported throughout the African continent. However, there have been no reports on epidemiologic surveys of these infections in Zambia. This study was designed to clarify the prevalence of three rickettsioses in 377 humans in Zambia. The seroprevalence of antibodies against R. conorii, R. typhi, and C. burnetii was 16.7%, 5.0%, and 8.2%, respectively. The rates of antibody positivity against R. conorii and C. burnetii were higher in the eastern (23.1% and 11.8%) and western (16.8% and 7.4%) areas of Zambia than in the northern (3.0% and 3.0%) area of this country. There was little difference among the three areas in the distribution of antibodies against R. typhi. Since cattle breeding is more extensive in the western and eastern areas than in the northern area, it is thought that cattle-breeding areas are foci of R. conorii and C. burnetii infections in Zambia.Recently, serologic surveys of antibodies against spotted fever group (SFG) rickettsia, Rickettsia typhi, and Coxiella burnetii in humans living in African countries (Angola, Burkina Faso, Central African Republic, Comoros, Congo, Ivory Coast, Mali, and Tanzania) using an indirect immunofluorescent antibody (IFA) test have demonstrated a high prevalence of antibodies to rickettsiae. 1,2 However, there has been no seroepidemiologic survey of antibodies against rickettsiae in humans living in Zambia. In this study, the extent of infection with three rickettsioses (SFG rickettsia, murine typhus, and Q fever) in humans living in Zambia was investigated.Serum samples were collected from inhabitants of Kasama (northern area), Chipata (eastern area), and Limulunga and Senanga (western area) Zambia by one of the authors (FH) in 1989 for an epidemiologic survey of Rift Valley fever. 3 These sera were collected after informed consent was obtained for surveys of infectious diseases. The study was approved by the School of Veterinary Medicine of the University of Zambia and the Graduate School of Veterinary Medicine of Rakuno-Gakuen University. Information on sex, age, occupation, contact with livestock (cattle), participation in meat processing, and handling of aborted fetuses of cattle was obtained by questionnaires at the time of the collection of blood samples. Sera were absorbed in blood sampling papers and dried according to the manufacturer's instructions for blood sampling filter paper (Toyo-Roshi, Tokyo, Japan). The papers were kept at 4ЊC until 1996 and eluted into 600 l of phosphate-buffered saline (PBS), pH 7.5 (Nissui Pharmaceutical Co., Tokyo, Japan). The eluted serum was considered a 16-fold dilution.The R. conorii Moroccan strain, the R. typhi Wilmington strain, and the C. burnetii Nine Mile phase II strain (VR-616; American Type Culture Collection, Rockville, MD) were grown and maintained in Vero E6 cells, BSC-40 cells, and BGM cells, respectively, and used as antigens of SFG rickettsia, murine typhus, and Q fever, respectively. Ricke...

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“…The sera obtained from Apodemus mice were examined by the indirect fluorescent antibody (IFA) test described previously (2). Fluorescein-isothiocyanate conjugated anti rat IgG goat serum (Cappel) was employed.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Spotted Fever Group Rickettsia Antibody in Apodemus Speciosus Captured in an Endemic Focus in Miyazaki Prefecture, Japan

Morita

Yamamoto

Tsuchiya

et al. 1990

JJMSB

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Spotted Fever Group Rickettsia in Dogs in Japan

Cited by 16 publications

References 3 publications

Survey of Tick-Borne Diseases in Dogs Infested with Rhipicephalus sanguineus at a Kennel in Okayama Prefecture, Japan.

Survey of Tick-Borne Diseases in Dogs Infested with Rhipicephalus sanguineus at a Kennel in Okayama Prefecture, Japan.

Short report: prevalence of antibodies against spotted fever, murine typhus, and Q fever rickettsiae in humans living in Zambia.

Prevalence of Spotted Fever Group Rickettsia Antibody in Apodemus Speciosus Captured in an Endemic Focus in Miyazaki Prefecture, Japan

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