Two cases of Japanese spotted fever infected in Rokko mountain near urban area of southern Hyogo Prefecture

Kanzaki, Akinori; Natsuaki, Masaru; Matsutani, Shinji; Mase, Koushi; Nakajima, Emi; Kataoka, Seiko; Konya, Hiroyuki; Takeda, Atsushi; Nishiura, Tetsuo; Takada, Nobuhiro

doi:10.1111/1346-8138.14208

Cited by 4 publications

(2 citation statements)

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“…JSF mainly occurs west of the Kanto region. In Hyogo Prefecture, several JSF cases have been reported annually, with 16 cases in the Rokko Mountain Range from 2014 to 2018 (Kanzaki et al, 2018;Takada et al, 2019b). Patients with SFTS have been identified west of the Kinki/Hokuriku regions since 2013 (Fukushi and Saijo, 2013;Kishimoto and Kida, 2013;Morikawa, 2015).…”

Section: Discussionmentioning

confidence: 99%

Epidemiological survey of tick bites occurring in Hyogo Prefecture from 2014 through 2018

Inoue

Natsuaki

Yamanishi

2020

Jap. J. Sanit. Zool.

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The present report summarizes 519 cases of tick bites in Hyogo Prefecture over 5 years from 2014 through 2018. There were 222 male and 297 female cases, and ages ranged from 0 to 95 years old. The most common age group was the 70 to 79 age range (n=124). Tick bites were especially frequent in May, June, and July. The causative ticks in 431 tick bite cases were identified as Amblyomma testudinarium (AT), followed by 72 cases involving Haemaphysalis longicornis ticks, and 7 cases involving Haemaphysalis hystricis ticks. Among the 431 AT bites, 61 cases developed erythema larger than 50 mm in diameter at the bite site, and those patients were diagnosed with tick-associated rash illness (TARI). Although tick-borne diseases such as severe fever with thrombocytopenia syndrome (SFTS) and Japanese spotted fever (JSF) that are related to the above-mentioned tick species were reported in Hyogo Prefecture, there were no patients who presented with such diseases in the current report. Our findings suggest that SFTS or JSF infections that develop after tick bites are most likely accidental occurrences and that dermatologists in western Japan should pay attention to TARI as a differential diagnosis of Lyme disease in tick bite cases.

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Section: Discussionmentioning

confidence: 99%

Epidemiological survey of tick bites occurring in Hyogo Prefecture from 2014 through 2018

Inoue

Natsuaki

Yamanishi

2020

Jap. J. Sanit. Zool.

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“…However, tick‐borne infection is a risk in some regions. It is worthy of attention that multiple cases of JSF infected near the urban area of southern Hyogo Prefecture have been reported, 48 even though most cases of tick‐borne infectious diseases occur in infested mountainous areas which are a natural habitat of ticks. The clinical presentation of each infection is not described here because it is beyond the scope of this article, but it is crucial to consider symptoms that may develop after several days to 4 weeks following a tick’s attachment.…”

Section: Tick‐borne Infectionsmentioning

confidence: 99%

Tick bites in Japan

Natsuaki

2021

The Journal of Dermatology

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Ticks are blood‐sucking ectoparasites belonging to the order Acarina, class Arachnida. In Japan, eight genera and 46 species are known. Tick bite patients frequently present to dermatology clinics. The main causative species of human tick bites are Ixodes persulcatus and Ixodes ovatus in northern to central Japan, and Amblyomma testudinarium and Haemaphysalis longicornis in western Japan. Tick bites often occur from April to September, particularly in May through July, consistent with the active period for ticks. Although erythema usually does not develop at the tick bite site, a small area of erythema may be seen in some cases. Occasionally, an erythema larger than 50 mm in diameter are formed at the bite site, known as tick‐associated rash illness. It is thought that the erythema is a delayed‐type allergic reaction to the substances in tick saliva. Repeated tick bites induce immunoglobulin E production against galactose‐1,3‐α‐galactose, one of the substances in tick saliva, which may trigger an immediate allergic reaction. The most reliable method to remove a tick sucking blood is en bloc resection of the tick and surrounding skin under local anesthesia. Insect repellent spray containing icaridin or DEET are effective to prevent ticks from attaching and tick‐borne infections. It is important to educate not only dermatologists but also the general public regarding tick bites.

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