The First Human Case of &lt;i&gt;Rickettsia tamurae&lt;/i&gt; Infection in Japan

Imaoka, Kaoru; Kaneko, Sakae; Tabara, Kenji; Kusatake, Kenji; Morita, Eishin

doi:10.1159/000326941

Cited by 81 publications

(55 citation statements)

References 9 publications

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“…Wild boars in Japan may be infected by R. tamurae, which is found in skin biopsy specimens and ticks (432). Until recently, it was not thought to be pathogenic, but the first human case was reported in 2011 in Japan (433). However, a spotted fever case reported from Laos was seroreactive for the R. tamurae antigen (422).…”

Section: Tick-borne Rickettsiae In Asia Species Identified As Pathogensmentioning

confidence: 99%

Update on Tick-Borne Rickettsioses around the World: a Geographic Approach

et al. 2013

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SUMMARY Tick-borne rickettsioses are caused by obligate intracellular bacteria belonging to the spotted fever group of the genus Rickettsia . These zoonoses are among the oldest known vector-borne diseases. However, in the past 25 years, the scope and importance of the recognized tick-associated rickettsial pathogens have increased dramatically, making this complex of diseases an ideal paradigm for the understanding of emerging and reemerging infections. Several species of tick-borne rickettsiae that were considered nonpathogenic for decades are now associated with human infections, and novel Rickettsia species of undetermined pathogenicity continue to be detected in or isolated from ticks around the world. This remarkable expansion of information has been driven largely by the use of molecular techniques that have facilitated the identification of novel and previously recognized rickettsiae in ticks. New approaches, such as swabbing of eschars to obtain material to be tested by PCR, have emerged in recent years and have played a role in describing emerging tick-borne rickettsioses. Here, we present the current knowledge on tick-borne rickettsiae and rickettsioses using a geographic approach toward the epidemiology of these diseases.

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Section: Tick-borne Rickettsiae In Asia Species Identified As Pathogensmentioning

confidence: 99%

Update on Tick-Borne Rickettsioses around the World: a Geographic Approach

et al. 2013

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“…In Japan, since the first patient infected with R. japonica was reported in Tokushima Prefecture in 1984 [10], rickettsiosis has been noticed as a significant emerging infectious disease. Thereafter, cases caused by R. helvetica, R. tamurae, and R. heilongjiangensis have been also reported in Japan [1,7,17]. In wildlife, infection with R. japonica or R. heilongjiangensis, R. felis and R. helvetica was reported in feral raccoons in Hokkaido, Japan [13].…”

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confidence: 99%

Molecular Detection of Spotted Fever Group Rickettsia in Feral Raccoons (<i>Procyon lotor</i>) in the Western Part of Japan

Baba

Kaneda

Nishimura

et al. 2013

The Journal of Veterinary Medical Science

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ABSTRACT. Rickettsial infection in feral raccoons (Procyon lotor) in the western part of Japan (Shimane, Fukuoka, Saga and Nagasaki Prefectures) was surveyed by a nested polymerase chain reaction (PCR) assay detecting the rickettsial citrate synthase (gltA) gene. Four of one hundred and ninety-four feral raccoon spleens (2.1%) were positive for Rickettsia spp. One gltA gene sequence was identical to R. helvetica, whereas the other 3 sequences were identical and had the highest similarity (98.4%) to R. amblyommii. Simultaneously, we determined a partial sequence of the rickettsial 17-kilodalton (17K) genus-common antigen gene in the later 3 raccoon samples. Their sequences were identical and had the highest similarity (98.5%) to Rickettsia sp. Hj126. Based on the sequences of gltA and 17K antigen genes, these raccoons might be infected with spotted fever group (SFG) rickettsia most closely related to R. amblyommii and/or Rickettsia sp. Hj126. Feral raccoons may be a susceptible reservoir for SFG rickettsiae in Japan.

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“…testudinarium, which sometimes carries Rickettsia tamurae (Imaoka et al, 2011), is the most common Amblyomma in south-eastern Asia (Petney and Keirans, 1995;Voltzit and Keirans, 2002). The species, originally described from Java (Koch, 1844), ranges throughout the tropical wooded regions of Asia from Sri Lanka and India, through Myanmar, Thailand, Laos, Vietnam, Malaysia, Indonesia, Borneo, Sarawak, the Philippines, Taiwan, mainland China and Japan (Voltzit and Keirans, 2002).…”

Section: Discussionmentioning

confidence: 99%

Human Infestation by Amblyomma testudinarium (Acari: Ixodidae) in Malay Peninsula, Malaysia

Yamauchi

Takano

Maruyama

et al. 2012

J. Acarol. Soc. Jpn.

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A Japanese male repeatedly infested with Amblyomma testudinarium in Malaysia was reported. He visited to Ulu Gombak, Malay Peninsula, Malaysia on April and May 2007, and he recalled three times of tick bite during traveling. The fi rst tick bite was by one nymph infested on the inner side of the brachium of the patient. After a few days, erythema with a diameter of 2 cm was found at the site of tick attachment. Pain of the site remained for 20 days. The second tick bite was by larvae infested on the skin surface of the abdomen, basal portion of the thigh, and scrotum of the patient. He felt a pain at the moment of tick infestation. The pain remained for 15 days. The third tick bite was by a larva, and the tick was found in the phyma of his back immediately after his return Japan.

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The First Human Case of <i>Rickettsia tamurae</i> Infection in Japan

Cited by 81 publications

References 9 publications

Update on Tick-Borne Rickettsioses around the World: a Geographic Approach

Update on Tick-Borne Rickettsioses around the World: a Geographic Approach

Molecular Detection of Spotted Fever Group Rickettsia in Feral Raccoons (<i>Procyon lotor</i>) in the Western Part of Japan

Human Infestation by Amblyomma testudinarium (Acari: Ixodidae) in Malay Peninsula, Malaysia

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