Tick Infestation of Sika Deer (Cervus nippon) in the Western Part of Yamaguchi Prefecture, Japan.

Inokuma, Hisashi; Fujimoto, Takako; Hosoi, Eiji; Tanaka, Shuuhei; Fujisaki, Kozo; Okuda, Masaru; Onishi, Takafumi

doi:10.1292/jvms.64.615

Cited by 26 publications

(22 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other C. n. centralis were hunted at Saitama (n=1), Hiroshima (n=8) and Tottori Immediately upon sacrificing the animal, a small piece of spleen was collected, kept in a cold box kept at 4°C and transported to Yamaguchi University. Tick species of sika deer from Yamaguchi Prefecture were previously examined, including Haemaphysalis longicornis, Haemaphysalis yeni, Haemaphysalis flava, Haemaphysalis megasoinosa, Haemaphysalis kitaokai and Amblyomma testudinarium [7]. However, no information was available for tick infestation of sika deer in other location.…”

mentioning

confidence: 99%

Divergence of p33/34 Gene of Theileria Found in Cervus nippon in Japan

Inokuma

Nagata

Hosoi

et al. 2008

The Journal of Veterinary Medical Science

Self Cite

View full text Add to dashboard Cite

ABSTRACT. The 18S rRNA gene and the piroplasm major immunodominant protein gene (p33/34) of Theileria from various subspecies of sika deer in 8 different locations of Japan were analyzed. The similarity between 633 bp partial sequences of the 18S rRNA gene among various subspecies of sika deer was found to be between 99.7% and 100%. While the percent identities of the 412 bp partial p33/34 gene sequence and deduced amino acid sequences between Theileria of sika deer from Yamaguchi Prefecture and those found in deer from other Prefectures, were comparatively low, 68.7% to 70.1% and 64.1% to 70.0% respectively. These findings suggest that there are at least two genetically distinct strains of Theileria of sika deer in Japan. KEY WORDS: Cervus nippon, divergence, Theileria sp.

show abstract

mentioning

confidence: 99%

Divergence of p33/34 Gene of Theileria Found in Cervus nippon in Japan

Inokuma

Nagata

Hosoi

et al. 2008

The Journal of Veterinary Medical Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…R. tamurae AT-1 was confirmed as a new species in 2006, and was expected specifically infectious to A. testudinarium [7]. The pathogenicity of R. tamurae AT-1 in humans and animals is poorly understood, although the first case of human infection was reported in 2011 [12], and A. testudinarium ticks bite humans [25]. This indicates that R. tamurae-causing SFG rickettsiosis is transmitted by A. testudinarium on the sides of the Chugoku Mountains in Shimane prefecture.…”

Section: Discussionmentioning

confidence: 99%

“…Although some of SFG Rickettsia spp. are known in Japan, R. japonica, R. heilongjiangensis and R. tamurae had been isolated or detected from Japanese SFG rickettsiosis patients [1,12].The range of ungulates such as wild boars (Sus scrofa leucomystax) and sika deer (Cervus nippon) has recently been expanding rapidly in Japan [18]. These ungulates cause many problems such as crop damage, vegetation disturbance, and road accidents.…”

mentioning

confidence: 99%

“…Although some of SFG Rickettsia spp. are known in Japan, R. japonica, R. heilongjiangensis and R. tamurae had been isolated or detected from Japanese SFG rickettsiosis patients [1,12].…”

mentioning

confidence: 99%

“…In Shimane Prefecture, SFG rickettsioses are limited to Shimane Peninsula. However, R. tamurae-causing SFG rickettsiosis was first reported from the sides of the Chugoku Mountains [12]. Only a few witnesses have reported the presence of sika deer in this area, whereas wild boars have caused serious damage to agricultural crops, so hunting and aggressive population control have been introduced to reduce their numbers.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Detection of <i>Rickettsia tamurae</i> DNA in Ticks and Wild Boar (<i>Sus scrofa leucomystax</i>) Skins in Shimane Prefecture, Japan

Motoi

Asano

Inokuma

et al. 2013

The Journal of Veterinary Medical Science

Self Cite

View full text Add to dashboard Cite

Town, Shimane Prefecture, Japan. We collected blood, spleens, skins and ticks from the wild boars, which were examined for rickettsial infections using polymerase chain reaction (PCR) primers for the genes rickettsial 17-kDa antigen and citrate synthase (gltA). We amplified Rickettsia tamurae AT-1 DNA from the tick Amblyomma testudinarium and from wild boar skins where ticks attached. Antibodies against spotted fever group Rickettsia were detected in wild boar sera using immunofluorescence, whereas blood and spleen samples contained no rickettsial DNA. This study suggests that wild boars have a role as an amplifier and a transporter of A. testudinarium, which harbor R. tamurae. The Rickettsia is an obligate intracellular gram-negative bacterium, which infects various animals and humans. Rickettsiae are transmitted by hematophagous arthropods such as fleas, lice, or ticks [19], and rickettsiosis is known to be a vector-borne infectious disease for human. In Japan, the spotted fever group (SFG) rickettsiosis is the most prevalent vector-borne infection [1]. Although some of SFG Rickettsia spp. are known in Japan, R. japonica, R. heilongjiangensis and R. tamurae had been isolated or detected from Japanese SFG rickettsiosis patients [1,12].The range of ungulates such as wild boars (Sus scrofa leucomystax) and sika deer (Cervus nippon) has recently been expanding rapidly in Japan [18]. These ungulates cause many problems such as crop damage, vegetation disturbance, and road accidents. Also, these ungulates may pose a hazard to public health. The risks of zoonotic diseases are of increasing concern, because of the overabundance of ungulates and frequent contacts between humans and wildlife [5,8]. These ungulates are important hosts of hematophagous arthropods such as Ixodid ticks [5,13]. Hematophagous arthropods can invade human habitations via host ungulates with the potential for increasing the risk of vector-borne infections in humans.R. japonica-causing SFG rickettsiosis (Japanese spotted fever) has been recorded in Shimane Prefecture (Fig. 1), and it was suggested that the high prevalence of R. japonica among vector ticks was correlated with the distribution pattern and population density of sika deer [20]. In Shimane Prefecture, SFG rickettsioses are limited to Shimane Peninsula. However, R. tamurae-causing SFG rickettsiosis was first reported from the sides of the Chugoku Mountains [12]. Only a few witnesses have reported the presence of sika deer in this area, whereas wild boars have caused serious damage to agricultural crops, so hunting and aggressive population control have been introduced to reduce their numbers. Studies on tick species and their associations with rickettsiosis have been conducted with sika deer, but little relevant information is available for wild boars in Japan. The purpose of this study was to clarify the role of wild boars in human rickettsiosis on the sides of the Chugoku Mountains, Shimane Prefecture. MATERIALS AND METHODSSample collection: From December 2009 to January 2010 (winter...

show abstract

Development and biological characteristics of Haemaphysalis longicornis (Acari: Ixodidae) under field conditions

Zheng

Chen

et al. 2010

Exp Appl Acarol

View full text Add to dashboard Cite

The development and biological characteristics of Haemaphysalis longicornis were investigated under field conditions in Xiaowutai National Natural Reserve Area, North China. Unfed larvae, nymphs and adults were fed on rabbits and exposed to daylight. Three free-living stages were allowed to develop in field plot selected in a tick natural habitat. The host seeking behavior and seasonal occurrence were observed. Haemaphysalis longicornis were active from mid March to mid October. The premoult period of nymphs and preoviposition of females were regulating phases of their life cycle. The developmental durations of eggs, larvae and adults were constant under field conditions regardless when the development started. The oviposition periods in May and June were statistically shorter than those in July and August. The daily oviposition patterns of females engorged in May and June demonstrated unobvious peak, which differed from those engorged in July and August. The daily oviposition peak of the latter occurred on the 4th day of oviposition. Moreover, a positive correlation was found between the mass of the laid egg and the body weight of engorged females (r = 0.62, P < 0.001). The female reproductive efficiency indices were 2.9, 6.1, 10.5 and 9.0 in May, June, July and August, respectively. The mean weight (3.33 mg) of engorged nymphs molting to females was significantly higher than that (2.35 mg) of those molting to males (P < 0.001), but the body weights of both sexes were overlapping.

show abstract

Tick Infestation of Sika Deer (Cervus nippon) in the Western Part of Yamaguchi Prefecture, Japan.

Abstract: ABSTRACT. Ticks were collected from 94 sika deer (Cervus nippon) hunted in the western part of Yamaguchi Prefecture, Japan

Cited by 26 publications

References 14 publications

Divergence of p33/34 Gene of Theileria Found in Cervus nippon in Japan

Divergence of p33/34 Gene of Theileria Found in Cervus nippon in Japan

Detection of <i>Rickettsia tamurae</i> DNA in Ticks and Wild Boar (<i>Sus scrofa leucomystax</i>) Skins in Shimane Prefecture, Japan

Development and biological characteristics of Haemaphysalis longicornis (Acari: Ixodidae) under field conditions

Contact Info

Product

Resources

About