| [leptotrombidium scutellare in transmission of epidemic hemorrhagic fever virus]. | to further elucidate the role of leptotrombidium scutellare in transmission of epidemic hemorrhagic fever virus (ehfv), a series of studies were carried out from 1988 to 1990. ehfv was isolated from both larvae of free mites collected from the grassland of endemic areas and larvae of filial mites hatched in the laboratory. the suckling mice bitten by these larvae were infected by ehfv. because only the larvae of chigger mite can bite vertebrate hosts and only take a full meal in its entire life ... | 1992 | 1363219 |
| epidemiology of tsutsugamushi disease in relation to the serotypes of rickettsia tsutsugamushi isolated from patients, field mice, and unfed chiggers on the eastern slope of mount fuji, shizuoka prefecture, japan. | a total of 59 strains of rickettsia tsutsugamushi were isolated from patients (24 isolates), apodemus speciosus mice (30 isolates), and unfed larvae of leptotrombidium scutellare (2 isolates) and leptotrombidium pallidum (3 isolates) in the gotenba-oyama district, shizuoka prefecture, japan. all these isolates were classified into the three serotypes karp, kawasaki, and kuroki based on reactivity with strain-specific monoclonal antibodies. kawasaki- and karp-type rickettsiae were isolated from l ... | 1992 | 1452653 |
| trombiculid mites (acari: trombiculidae) and rickettsia tsutsugamushi isolated from wild rodents in a new endemic area of japan. | investigations of trombiculid mites and rickettsia tsutsugamushi in wild rodents were made in southern gifu prefecture where patients infected with tsutsugamushi disease recently have been found. a total of 16,396 trombiculid mites, consisting of 10 species from three genera, was collected from 170 apodemus speciosus in two locations. kani-sakahogi and kuze. leptotrombidium scutellare (nagayo et al.) (44.0%) was most predominant, followed by l. pallidum (nagayo et al.) (26.9%); l. fuji (kuwata e ... | 1990 | 2117663 |
| [study on natural infection of epidemic haemorrhagic fever virus in leptotrombidium scutellare]. | leptotrombidium (l.) scutellare was considered to be the suspected vector of epidemic haemorrhagic fever (ehf). in order to clarify the relationship between this mite and ehf, from oct to nov 1988 and oct of 1989, the larvae of this mite were collected from rats in areas with constantly high incidence of ehf in shanxi province and larvae with only small quantity of meal were selected and for more than 15 days before isolation of ehfv. six strains of virus were isolated. the viruses isolated were ... | 1990 | 2124535 |
| leptotrombidium scutellare as a vector of scrub typhus at the endemic area of the foothills of mt. fuju, japan. | | 1974 | 4472171 |
| comparative epidemiological studies on vector/reservoir animals of tsutsugamushi disease between high and low endemic areas in korea. | comparative epidemiological studies on vector reservoir animals of tsutsugamushi disease were carried out in between south coast (the highest endemic) areas and east coast (low endemic) areas in october 1993. fauna of field rodents and their population densities were not different between two areas. antibody positive rate of apodemus agrarius sera was higher in east coast (43.2% in south coast and 63.6% in east coast). high correlation (r = 0.87) was shown between antibody positive rate of a. ag ... | 1995 | 7735783 |
| trombiculid fauna and seasonal abundance of leptotrombidium scutellare (acari: trombiculidae) in an endemic area of scrub typhus (tsutsugamushi disease) in yamakita town, kanagawa prefecture, japan. | using the tullgren funnel method, we surveyed for trombiculid larvae around dwellings and in mandarin orange groves on the slopes of sengenyama and maruyama, yamakita town, kanagawa prefecture, japan, during the period between 8 october 1992 and 8 january 1993. in total, 6,690 trombiculid larvae, consisting of 6,669 leptotrombidium scutellare (nagayo, mitamura, tamiya & tenjin), 13 l. fuji kuwata, berge & philip, two l. himizu (sasa, kumada, hayashi, enomoto, fukuzumi & obata), two neotrombicula ... | 1994 | 7815396 |
| transmission of rickettsia tsutsugamushi strains among humans, wild rodents, and trombiculid mites in an area of japan in which tsutsugamushi disease is newly endemic. | thirty-two newly isolated strains of rickettsia tsutsugamushi, 14 from patients with tsutsugamushi disease, 12 from wild rodents, and 6 from trombiculid mites parasitizing rodents in gifu prefecture, japan, were examined for reactivities to 12 monoclonal antibodies by an indirect fluorescent-antibody test to classify their antigenicities. all of the isolates could be classified into one of six groups (kn-1, kn-2, kn-3, gj-1, r158, and r161) according to their reactivities to the monoclonal antib ... | 1994 | 7852572 |
| the role of leptotrombidium scutellare in the transmission of human diseases. | to investigate the role of leptotrombidium (l.) scutellare in the transmission of hemorrhagic fever with renal syndrome (hfrs) and tsutsugamushi disease of autumn-type. | 1996 | 9275333 |
| detection of orientia tsutsugamushi (rickettsiales: rickettsiaceae) in unengorged chiggers (acari: trombiculidae) from oita prefecture, japan, by nested polymerase chain reaction. | the current study surveyed the 56-kda type-specific antigen (tsa) gene dnas of orientia tsutsugamushi (hayashi) in approximately 4.000 unengorged chiggers obtained from the soil or ground surface in an endemic and a nonendemic area of the tsutsugamushi disease in oita prefecture, southwestern japan, by nested polymerase chain reaction (pcr). serotypes of o. tsutsugamushi were identified by restriction fragment-length polymorphism (rflp) analysis. in the endemic area, 242 pools from five species ... | 2001 | 11296840 |
| [epidemiological analysis on many cases of tsutsugamushi disease found in hiroshima prefecture, japan]. | the clinical findings of tsutsugamushi disease and the fauna of trombiculid mites in hiroshima prefecture were studied in this report. we reviewed 63 cases of tsutsugamushi disease occurring between 1990 and 1999, and most of cases were contracted in the area around the midportion of the oota river (55 cases; 87.3%). of these, 30 cases (47.1%) lived in asakita-ku in hiroshima city. eschar was detected in 33/19 (84.6%) cases, and 97.6% (40/41), 88.9% (16/18) patients showed eruption and lymphaden ... | 2001 | 11424485 |
| [investigation on natural foci of autumn-winter type tsutsugamushi disease in shandong province]. | in order to provide basic data of tsutsugamushi disease in shandong province, for the control and prevention of this disease in residents and army-men. | 2000 | 11860801 |
| [investigation of chigger mites on the rat eothenomys miletus in yunnan]. | to understand the species, species distribution, the dominant species and their interspecies interaction of chigger mites on eothenomys miletus(a dominant species of rats) in yunnan. | 2006 | 17361812 |
| [study of chigger communities on major species of rodents in yunnan province]. | to understand the characteristics of the chigger communities on the major species of rodent hosts. | 2006 | 17366968 |
| [genotype identification and sequence analysis of orientia tsutsugamushi isolated from shandong area]. | to determine genotype, nucleotide sequence homology and phylogenesis of orientia tsutsugamushi isolated from shandong, china. | 2006 | 17415986 |
| [detection the coinfection of hantavirus and orientia tsutsugamushi in primary cultured mite cells]. | to investigate whether hv and ot can coexist in their host (leptotrombidium scutellare). | 2007 | 18322585 |
| [molecular epidemiological study on the host and role of the hantavirus and orientia tsutsugamushi in the same epidemic area]. | to investigate whether hantavirus (hv) and orientia tsutsugamushi ( ot) can naturally infect and coexist in their host and role. | 2008 | 19115620 |
| geographical distribution and relative abundance of vectors of scrub typhus in the republic of korea. | a survey to determine the geographical distribution and relative abundance of potential vectors of scrub typhus was conducted from october to november 2006 at 13 localities throughout the republic of korea. apodemus agrarius accounted for 97.6% (80/82) of all rodents, while only 2 myodes regulus (2/82) were collected. a total of 10,860 chiggers were collected from a. agrarius belonging to 4 genera and 8 species, while only walchia fragilis (40) was collected from myodes regulus. leptotrombidium ... | 2009 | 19967086 |
| [study on the transmission of hantaan virus and orientia tsutsugamushi by naturally dual infected leptotrombidium scutellare through stinging]. | to investigate whether leptotrombidium scutellare could be naturally infected by both hantaan virus (hv) and orientia tsutsugamushi (ot) and transmission status by stinging. | 2010 | 20654145 |
| detection of orientia tsutsugamushi, the causative agent of scrub typhus, in a novel mite species, eushoengastia koreaensis, in korea. | to identify potential vector species of scrub typhus in the republic of korea (rok), chigger mites were harvested from wild rodents captured at nine localities in october 2005. the bodies of the chigger mites were individually punctured with a fine pin, squeezed out internal contents, and examined for orientia tsutsugamushi dna by nested polymerase chain reaction. the exoskeleton of associated chiggers was mounted on glass slides with polyvinylalcohol (pva) medium for identification. among 830 i ... | 2011 | 21443412 |
| estimation of the genome sizes of the chigger mites leptotrombidium pallidum and leptotrombidium scutellare based on quantitative pcr and k-mer analysis. | leptotrombidium pallidum and leptotrombidium scutellare are the major vector mites for orientia tsutsugamushi, the causative agent of scrub typhus. before these organisms can be subjected to whole-genome sequencing, it is necessary to estimate their genome sizes to obtain basic information for establishing the strategies that should be used for genome sequencing and assembly. | 2014 | 24947244 |
| [study of epidemic area on tsutsugamushi disease in taizhou from 2013 to 2014]. | objective: to study the epidemiological characteristics of tsutsugamushi disease, and to confirm the existence of the disease's epidemic foci in taizhou. methods: from 2013 to 2014, dongxing town hospital and xingqiao town hospital were selected as specimen collection sites in jingjiang city. blood samples (5 ml) were collected from 40 patients with acute tsutsugamushi disease. a total of 59 rodents were captured with cage night method in the survey sites at 5, 7, 9, 10, and 11 months in 2013, f ... | 2017 | 28260341 |
| comparison of preferred bite sites between mites and ticks on humans in korea. | identification of mite and tick bite sites provides important clinical information. the predominant mite species in korea associated with scrub typhus are leptotrombidium pallidum and leptotrombidium scutellare the most abundant tick species is haemaphysalis longicornis to date, there has been no comparative study on preferred bite sites between mites and ticks in humans. this study included a review of medical records and a field study. for mite bite sites, eschars were checked on 506 patients ... | 2016 | 27645781 |
| seroepidemiological survey of zoonotic diseases in small mammals with pcr detection of orientia tsutsugamushi in chiggers, gwangju, korea. | serosurveillance for zoonotic diseases in small mammals and detection of chiggers, the vector of orientia tsutsugamushi, were conducted from september 2014 to august 2015 in gwangju metropolitan area. apodemus agrarius was the most commonly collected small mammals (158; 91.8%), followed by myodes regulus (8; 4.6%), and crocidura lasiura (6; 3.5%). the highest seroprevalence of small mammals for o. tsutsugamushi (41; 26.3%) was followed by hantaviruses (24; 15.4%), rickettsia spp. (22; 14.1%), an ... | 2016 | 27417085 |
| surveillance of potential hosts and vectors of scrub typhus in taiwan. | scrub typhus is a lethal infectious disease vectored by larval trombiculid mites (i.e. chiggers) infected with orientia tsutsugamushi (ot) and recent decades have witnessed an emergence of scrub typhus in several countries. identification of chigger species and their vertebrate hosts is fundamental for the assessment of human risks to scrub typhus under environmental changes, but intensive and extensive survey of chiggers and their hosts is still lacking in taiwan. | 2015 | 26626287 |
| urbanization of scrub typhus disease in south korea. | scrub typhus is an endemic disease in asia. it has been a rural disease, but indigenous urban cases have been observed in seoul, south korea. urban scrub typhus may have a significant impact because of the large population. | 2015 | 26000454 |
| larval chigger mites collected from small mammals in 3 provinces, korea. | a total of 9,281 larval chigger mites were collected from small mammals captured at hwaseong-gun, gyeonggi-do (province) (2,754 mites from 30 small mammals), asan city, chungcheongnam-do (3,358 mites from 48 mammals), and jangseong-gun, jeollanam-do (3,169 for 62 mammals) from april-november 2009 in the republic of korea (= korea) and were identified to species. leptotrombidium pallidum was the predominant species in hwaseong (95.8%) and asan (61.2%), while leptotrombidium scutellare was the pre ... | 2014 | 24850971 |
| geographical distribution and seasonal indices of chigger mites on small mammals collected on the east coast of the republic of korea. | the geographical distributions and relative population densities of scrub typhus vector mites collected from small mammals were determined for 5 locations on the east coast of the republic of korea. collection sites included goseong, gangneung, and hoengseong in gangwon province and uljin and yeongdeok in gyeongbuk province. a total of 275 small mammals including members of rodentia (rodents) and soricomorpha (shrews, such as crocidura lasiura ) belonging to 4 genera and 4 species were captured ... | 2016 | 26653927 |
| monthly occurrence of vectors and reservoir rodents of scrub typhus in an endemic area of jeollanam-do, korea. | monthly surveys were conducted to investigate the occurrence of chigger mites and seroprevalence of scrub typhus among small mammals in jeollanam-do, the southwestern part of korea, from november 2006 through october 2007. fifty-eight small mammals, including 57 apodemus agrarius (98.3%) and 1 crocidura lasiura (1.7%), were captured, and a total of 4,675 chigger mites representing 4 genera and 8 species were collected from them. the chigger infestation rate among small mammals was 69.0%. the mos ... | 2012 | 23230330 |
| [research on the area distribution and host selection of leptotrombidium scutellare in 19 counties of yunnan province]. | in order to investigate the area distribution and host selection of leptotrombidium scutellare in yunnan province, a field survey was carried out during 2001 to 2009, based on different geographic location, topography, climate and ecological characteristics. a total of 16 491 l. scutellare were captured from the body surface of 9 838 small mammal hosts of 7 families, 18 genera, and 30 species in 4 orders, accounted for 17.73% (16,491/92,990) of all chigger mites collected. l. scutellare distribu ... | 2011 | 24830206 |
| ectoparasitic chigger mites on large oriental vole (eothenomys miletus) across southwest, china. | an investigation of chigger mites on the large oriental vole, eothenomys miletus (rodentia: cricetidae), was conducted between 2001 and 2013 at 39 localities across southwest china, and 2463 individuals of the vole hosts were captured and examined, which is a big host sample size. from the body surface of e. miletus, 49,850 individuals of chigger mites were collected, and they were identified as comprising 175 species, 13 genera, and 3 subfamilies in 2 families (trombiculidae and leeuwenhoekiida ... | 2016 | 26468149 |
| analysis of ectoparasites (chigger mites, gamasid mites, fleas and sucking lice) of the yunnan red-backed vole (eothenomys miletus) sampled throughout its range in southwest china. | the yunnan red-backed vole eothenomys miletus (rodentia: cricetidae) is an endemic rodent species and reservoir host of zoonoses in southwest china. based on a large host sample (2463 voles collected from 39 localities between 2001 and 2013), a general analysis of four categories of ectoparasite (fleas, sucking lice, chigger mites and gamasid mites) on e. miletus across its entire range of distribution was made. this analysis identified a total of 71 895 ectoparasites belonging to 320 species (3 ... | 2015 | 26345365 |
| abundances and host relationships of chigger mites in yunnan province, china. | this paper reports on ectoparasitic chigger mites found on small mammals in yunnan province, southwest china. data were accumulated from 19 investigation sites (counties) between 2001 and 2009. a total of 10 222 small mammal hosts were captured and identified; these represented 62 species, 34 genera and 11 families in five orders. from the body surfaces of these 10 222 hosts, a total of 92 990 chigger mites were collected and identified microscopically. these represented 224 species, 22 genera a ... | 2013 | 23167491 |
| detection of a novel rickettsia from leptotrombidium scutellare mites (acari: trombiculidae) from shandong of china. | leptotrombidium scutellare mites, the vector of orientia tsutsugamushi, have rarely been reported to associate with rickettsia species. three hundred nineteen chiggers were collected from the ears of 32 rodents captured in huangdao district of qingdao city, china, in october 2015. the chigger samples were tested for rickettsia, severe fever with thrombocytopenia syndrome virus, and hantavirus by pcr or rt-pcr amplification. all mites were classified morphologically and molecularly as l. scutella ... | 2017 | 28399204 |
| molecular epidemiology of an orientia tsutsugamushi gene encoding a 56-kda type-specific antigen in chiggers, small mammals, and patients from the southwest region of korea. | a phylogenetic analysis of orientia tsutsugamushi was performed to elucidate its antigenic diversity in chiggers, small mammals, and patients. between september 2014 and december 2016, a total of 3,816 chiggers were identified within nine species of four genera in the southwest region of korea: leptotrombidium scutellare (49.9%; 1,907/3,816), leptotrombidium orientale (21.1%; 804/3,816), leptotrombidium pallidum (12.4%; 474/3,816), euchoengastia koreaensis (7.2%; 273/3,816), leptotrombidium palp ... | 2018 | 29313468 |
| chigger mite (acari: trombiculidae) survey of rodents in shandong province, northern china. | chigger mites are parasites of rodents and other vertebrates, invertebrates, and other arthropods, and are the only vectors of scrub typhus, in addition to other zoonoses. therefore, investigating their distribution, diversity, and seasonal abundance is important for public health. rodent surveillance was conducted at 6 districts in shandong province, northern china (114-112°e, 34-38°n), from january to december 2011. overall, 225/286 (78.7%) rodents captured were infested with chigger mites. a ... | 2017 | 29103271 |
| landscapes with different biodiversity influence distribution of small mammals and their ectoparasitic chigger mites: a comparative study from southwest china. | from a previous field investigation in yunnan, southwest china between 2001 and 2015, we selected two types of landscapes to make a retrospectively comparative study on the distribution of small mammals and their ectoparasitic chigger mites. one landscape is "mountainous uncultivated land (mul)" with higher biodiversity, which is located in a famous "world nature heritage site", the three-parallel-rivers region in the northwest of yunnan. the other is "cultivated flatland landscape (cfl)" with l ... | 2018 | 29364908 |
| faunal analysis of chigger mites (acari: prostigmata) on small mammals in yunnan province, southwest china. | this paper studied the species diversity and fauna distribution of chigger mites on small mammals in yunnan province, southwest yunnan. in total, 120,138 individuals of chigger mites were collected from 13,760 individual small mammals, and these mites were identified as comprising two families, 26 genera, and 274 species. of the five zoogeographical subregions, the mite species diversity in subregions i and ii was higher than that in subregions iii, iv, and v. four mite species (leptotrombidium ... | 2015 | 25930112 |
| stylostome organization in feeding leptotrombidium larvae (acariformes: trombiculidae). | the stylostome of larvae of the trombiculids leptotrombidium scutellare (nagayo et al.), leptotrombidium fletcheri (womersley et heaslip) and leptotrombidium deliense (walch) was studied experimentally at different time intervals after larval attachment using the histological method. the stylostome of these species has the same organization and belongs to the epidermal combined with the mixed type, developing more in width than in length. neither transverse nor conspicuous longitudinal layers ar ... | 2014 | 24687177 |
| coincidence between geographical distribution of leptotrombidium scutellare and scrub typhus incidence in south korea. | to clarify the geographical distribution of scrub typhus vectors in korea, a survey of larval trombiculid mites was conducted from 2005 to 2007 by collecting wild small mammals twice a year (spring and autumn) at 24 sites nationwide. a total of 67,325 mites representing 4 genera and 14 species were collected from 783 trapped rodents, corresponding to a chigger index (number of chigger mites per rodent) of 86.0. the predominant mite species were leptotrombidium pallidum (52.6%), leptotrombiduim s ... | 2014 | 25500568 |
| host-seeking behavior of trombiculid mites on vegetation in relation to sika deer. | we collected larval trombiculid mites on vegetation monthly from october 1997 to february 2000, and from the heads of sika deer culled in march 2003 in boso peninsula, central japan. two species of trombiculid mites, neotrombicula nogamii takahashi, takano, misumi, and kikuchi and leptotrombidium scutellare nagayo, miyagawa, mitamura, and tamiya, occurred on vegetation. peak numbers of n. nogamii were found in january, and l. scutellare numbers peaked in november. both species were collected pre ... | 2015 | 26336314 |
| [case report; november fever--the clinical features of scrub typhus by leptotrombidium scutellare in south-central fukushima prefecture]. | | 2012 | 22413475 |