Prevalence of common tick-borne pathogens in white-tailed deer and coyotes in south Texas

Yu, Serene; Modarelli, Joseph J.; Tomeček, John M.; French, Justin T.; Hilton, Clayton D.; Esteve-Gasent, Maria D.

doi:10.1016/j.ijppaw.2020.01.005

Cited by 15 publications

(16 citation statements)

References 43 publications

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“…GenBank accession numbers and annotated identification for sequences used in the comparative analysis are indicated on the branch labels. Accession numbers in italics are those T. cervi sequences from white-tailed deer on the East Foundation's San Antonio Viejo Ranch in Starr and Jim Hogg Counties, Texas ( Yu et al, 2020 ). …”

Section: Resultsmentioning

confidence: 99%

“…Anaplasma platys , identified from A. nitens larval samples, is a known pathogen of dogs and is transovarially and transstadially transmitted in Rhipicephalus sanguineus Latreille ( Llanes and Rajeev, 2020 ; Snellgrove et al, 2020 ). Anaplasma platys has been previously reported from cervids, including a recent survey of white-tailed deer from the East Foundation's San Antonio Viejo Ranch (SAVR) in Starr and Jim Hogg counties of southern Texas ( Li et al, 2016 ; Yu et al, 2020 ). Twenty percent of A. maculatum ticks, all from ESR, were positive for an Ehrlichia sp.…”

Section: Discussionmentioning

confidence: 99%

“…A recent survey of deer on the SAVR (Starr and Jim Hogg Counties, Texas) indicated approx. 7% of 245 animals were positive for T. cervi ( Yu et al, 2020 ). Analysis of the 16 publicly available T. cervi sequences from Yu et al (2020) indicate a single genotype (Type F), while sequence data from A. nitens ticks in the current study indicate that all three cervid genotypes (Type F, G, and ‘divergent’) are circulating within this Cameron County (Texas) deer population ( Fig.…”

Section: Discussionmentioning

confidence: 99%

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Molecular screening for rickettsial bacteria and piroplasms in ixodid ticks surveyed from white-tailed deer (Odocoileus virginianus) and nilgai antelope (Boselaphus tragocamelus) in southern Texas

Olafson

Buckmeier

May

et al. 2020

International Journal for Parasitology: Parasites and Wildlife

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A survey of ixodid ticks parasitizing white-tailed deer ( Odocoileus virginianus ) and nilgai antelope ( Boselaphus tragocamelus ) was completed during the 2018–2019 public hunt season on the Laguna Atascosa National Wildlife Refuge (Cameron County, Texas) and the East Foundation's El Sauz Ranch in nearby Willacy County (Texas). Anocenter nitens was the predominant tick species identified with 5% of these ticks collected from nilgai. All life stages were encountered in high numbers on white-tailed deer, indicating that deer may be a primary host in this region. Amblyomma maculatum and Amblyomma inornatum were identified from both hosts, while Ixodes scapularis was encountered only on white-tailed deer. This is the first published record of A. inornatum on nilgai. A subset of ticks was used in PCR assays to detect Rickettsia spp., family Anaplasmataceae , Borrelia spp., and Theileria-Babesia spp. Borrelia spp. were not detected in any of the ticks analyzed. Rickettsia parkeri was detected in three A. maculatum adult ticks from deer, Rickettsia sp. endosymbiont sequences were present in all I. scapularis ticks, and Rickettsia amblyommatis was detected in three A. inornatum adult ticks from deer. Sequence analysis of Anaplasmataceae- positive amplicons from A. nitens and A. maculatum had low percent identity to published Anaplasma spp. sequences, suggesting a unique Anaplasma sp. may be circulating in the population. Anaplasma platys was detected from A. nitens larvae and an Ehrlichia sp. Delta strain was present in A. maculatum , both of unknown pathogenicity towards deer. Theileria cervi was detected in all stages of A. nitens ticks, and positive ticks originated from 27 of 31 deer and a single nilgai sampled from throughout the survey site. The primary vector for T. cervi is absent from this region, suggesting T. cervi is possibly maintained by a different tick species.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Molecular screening for rickettsial bacteria and piroplasms in ixodid ticks surveyed from white-tailed deer (Odocoileus virginianus) and nilgai antelope (Boselaphus tragocamelus) in southern Texas

Olafson

Buckmeier

May

et al. 2020

International Journal for Parasitology: Parasites and Wildlife

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“…Wild vertebrates are associated with several enzootic cycles of tick-borne pathogens contributing to the increase of ticks and TBDs in North America, playing an important role in the maintenance and transmission of zoonoses to livestock, humans, and other wildlife [34]. A more than two-fold increase in TBDs has been observed from 2004 (>22,000 cases) to 2016 (>48,000 cases) in the USA alone [35], and up to 476,000 people per year are infected with Lyme disease [36], with reports in both Mexico and USA [37][38][39][40] involving wild animals [41][42][43][44][45]. Furthermore, ticks and TBDs have evolved, adapting themselves to new vectors and vectors have adapted to new hosts; for instance, Amblyoma immitator has recently been proposed as a RMSF vector [46].…”

Section: Discussionmentioning

confidence: 99%

Molecular Detection of Tick-Borne Pathogens in American Bison (Bison bison) at El Uno Ecological Reserve, Janos, Chihuahua, Mexico

et al. 2021

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American bison (Bison bison) is listed as near-threatened and in danger of extinction in Mexico. Recent studies have demonstrated the presence of several emerging pathogens at the Janos Biosphere Reserve (JBR), inhabited by one wild herd of American bison. Blood samples were collected from 26 American bison in the JBR. We tested for the presence of Anaplasma marginale, Babesia bigemina, B. bovis, Borrelia burgdorferi sensu lato, and Rickettsia rickettsii DNA using nested and semi-nested PCR protocols performing duplicates in two different laboratories. Results showed three animals (11.5%) positive for B. burgdorferi s. l., three more (11.5%) for Rickettsia rickettsii, and four (19.2%) for B. bovis. Two individuals were co-infected with B. burgdorferi s. l. and B. bovis. We found no animals positive for A. marginale and B. bigemina. This is the first report in America of R. rickettsii in American bison. American bison has been described as an important reservoir for pathogens of zoonotic and veterinary importance; thus, the presence of tick-borne pathogen DNA in the JBR American bison indicates the importance of continuous wildlife health surveys.

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“…White-tailed deer have been believed to be the most pivotal element in the emergence of E. chaffeensis in the United States during the 20th century ( Paddock and Childs, 2003 ). Recently, E. chaffeensis were found in autochthonous cervidae from Argentina ( Guillemi et al, 2019 ) and white-tailed deer from south Texas of America ( Yu et al, 2020 ). Ehrlichia infection in mammal host usually induces a kind of zoonosis ehrlichiosis, which can parasitize in the cells of spleen, lymph node, bone marrow and peripheral blood and induce lesions and dysfunction of multiorgans.…”

Section: Introductionmentioning

confidence: 99%

Identification of Amblyomma javanense and detection of tick-borne Ehrlichia spp. in confiscated Malayan Pangolins

Zhai

Chen

et al. 2021

International Journal for Parasitology: Parasites and Wildlife

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Due to habitat destruction and illegal hunting and trade, the number of pangolins has been sharply reduced. To protect pangolins from extinction, relevant departments are combined and active action have been taken. A total of 21 confiscated Malayan pangolins were rescued in 2019, but died continuously for unknown reasons. This study aimed to investigate the reasons for the death of these pangolin and rescue them. 19 of the 21 confiscated pangolins had ticks on their body integument. A total of 303 ticks were collected and identified as Amblyomma javanense ( A. javanense ) according to their morphology and the sequences of 16S rRNA and internal transcribed spacer 2 (ITS2). There were multi-organ damages in the dead pangolins, especially congestion and hemorrhage in lung, heart and kidney and inflammation of which were observed using HE staining. Pathogens' nucleic acid detection showed ticks were only positive for Ehrlichia spp, with 56.7% positive rate of collected ticks (127/224), which was further confirmed in tissues from dead pangolins. Our findings confirm that ehrlichiosis caused by Ehrlichia spp. from A. javanense might accelerate the confiscated pangolin's death. More attention should be payed to tick-elimination work and the diagnoses and treatment of tick-borne diseases in the follow-up rescue operation.

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Prevalence of common tick-borne pathogens in white-tailed deer and coyotes in south Texas

Cited by 15 publications

References 43 publications

Molecular screening for rickettsial bacteria and piroplasms in ixodid ticks surveyed from white-tailed deer (Odocoileus virginianus) and nilgai antelope (Boselaphus tragocamelus) in southern Texas

Molecular screening for rickettsial bacteria and piroplasms in ixodid ticks surveyed from white-tailed deer (Odocoileus virginianus) and nilgai antelope (Boselaphus tragocamelus) in southern Texas

Molecular Detection of Tick-Borne Pathogens in American Bison (Bison bison) at El Uno Ecological Reserve, Janos, Chihuahua, Mexico

Identification of Amblyomma javanense and detection of tick-borne Ehrlichia spp. in confiscated Malayan Pangolins

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