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Dichotomous key to larvae of the genus #Amblyomma (Parasitiformes: Ixodidae) in Brazil, with morphological description and redescription of the larval stage of 30 #Amblyomma species Publication date: January 2026 Source: #ticks and #tick-borne Diseases, Volume 17, Issue 1 Author(s): Thiago F. Martins, Adriano Pinter, Vera L.F. de Camargo-Neves, Agustín Estrada-Peña, Pablo H. Nunes, Fábio Barbieri, Kátia M. Famadas, Marcelo B. Labruna

Dichotomous key to larvae of the genus #Amblyomma (Parasitiformes: Ixodidae) in Brazil, with morphological description and redescription of the larval stage of 30 #Amblyomma species Ticks&TBD

Dichotomous key to larvae of the genus #Amblyomma (Parasitiformes: Ixodidae) in Brazil, with morphological description and redescription of the larval stage of 30 #Amblyomma species Publication date: January 2026 Source: #ticks and #tick-borne Diseases, Volume 17, Issue 1 Author(s): Thiago F. Martins, Adriano Pinter, Vera L.F. de Camargo-Neves, Agustín Estrada-Peña, Pablo H. Nunes, Fábio Barbieri, Kátia M. Famadas, Marcelo B. Labruna

Dichotomous key to larvae of the genus #Amblyomma (Parasitiformes: Ixodidae) in Brazil, with morphological description and redescription of the larval stage of 30 #Amblyomma species Ticks&TBD

Incidental infestations of humans by hard #ticks (Acari: Ixodidae) in Colombia: Case reports and record of #Amblyomma cajennense sensu stricto Publication date: November 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 6 Author(s): Omar Esteban Vargas-Martínez, Luisa Fernanda Naranjo-Vargas, Laura Aramendiz-Macías, Francisco J. Díaz, Juan Carlos Quintero-Vélez, Thiago Fernandes Martins, Juan David Rodas-González

Incidental infestations of humans by hard #ticks (Acari: Ixodidae) in Colombia: Case reports and record of #Amblyomma cajennense sensu stricto Ticks&TBD

Assessing the potential risk of lone star #tick, #Amblyomma americanum, establishment in California Publication date: November 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 6 Author(s): Janet Foley, Francesca Rubino, Drew Kam, Kailyn Lozano

Assessing the potential risk of lone star #tick, #Amblyomma americanum, establishment in California Ticks&TBD

Incidental infestations of humans by hard #ticks (Acari: Ixodidae) in Colombia: Case reports and record of #Amblyomma cajennense sensu stricto Publication date: November 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 6 Author(s): Omar Esteban Vargas-Martínez, Luisa Fernanda Naranjo-Vargas, Laura Aramendiz-Macías, Francisco J. Díaz, Juan Carlos Quintero-Vélez, Thiago Fernandes Martins, Juan David Rodas-González

Incidental infestations of humans by hard #ticks (Acari: Ixodidae) in Colombia: Case reports and record of #Amblyomma cajennense sensu stricto Ticks&TBD

Assessing the potential risk of lone star #tick, #Amblyomma americanum, establishment in California Publication date: November 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 6 Author(s): Janet Foley, Francesca Rubino, Drew Kam, Kailyn Lozano

Assessing the potential risk of lone star #tick, #Amblyomma americanum, establishment in California Ticks&TBD

Synonymy of #Amblyomma kappa Kwak, 2024 (Acari: Ixodidae) with #Amblyomma formosanum Schulze, 1933, a parasite of turtles in Japan and Taiwan Abstract#Amblyomma kappa Kwak, 2024 (Acari: Ixodidae) is synonymized with #Amblyomma formosanum Schulze, 1933. Availability of the name A. formosanum is justified, and a morphological comparison is presented.

Synonymy of #Amblyomma kappa Kwak, 2024 (Acari: Ixodidae) with #Amblyomma formosanum Schulze, 1933, a parasite of turtles in Japan and Taiwan JMedEnt

Synonymy of #Amblyomma kappa Kwak, 2024 (Acari: Ixodidae) with #Amblyomma formosanum Schulze, 1933, a parasite of turtles in Japan and Taiwan Abstract#Amblyomma kappa Kwak, 2024 (Acari: Ixodidae) is synonymized with #Amblyomma formosanum Schulze, 1933. Availability of the name A. formosanum is justified, and a morphological comparison is presented.

Synonymy of #Amblyomma kappa Kwak, 2024 (Acari: Ixodidae) with #Amblyomma formosanum Schulze, 1933, a parasite of turtles in Japan and Taiwan JMedEnt

Range expansion of #Amblyomma americanum and #Ixodes scapularis ([Ixodida]: [Ixodidae]) in South Dakota, and new record for #Amblyomma maculatum AbstractThis project documents the expanded zoogeographic ranges of the blacklegged #tick (#Ixodes scapularis Say) and lone star #tick (#Amblyomma americanum Linnaeus) within eastern South Dakota. The research involves 2 steps. First, #tick surveillance was conducted in the eastern counties of South Dakota, spanning March 2021 through August 2022. Surveillance took place along the edge habitat at any accessible natural areas that could be identified as suitable #tick habitat. All life stages and species of #ticks were collected using a white cloth #tick drag, preserved in ethanol, and frozen. Second, the collection of data was contextualized by comparison with prior data in the region to determine if, and to what extent, range expansion had occurred. Distribution maps were created for each year to represent areas where I. scapularis and A. americanum were reported, and changes in species establishment were displayed. This study focused primarily on the Southeastern region of the state, near where I. scapularis populations exist in bordering Minnesota, and A. americanum in Nebraska and Iowa. As of the 2022 sampling season, the only counties where I. scapularis and A. americanum appear to have overlapping ranges are Clay County and Union County. This study also yielded a state record for another human disease vector, the Gulf Coast #tick (#Amblyomma maculatum Koch) in 2021 and 2022. Target species of #tick were detected in nine counties in eastern South Dakota.

Range expansion of #Amblyomma americanum and #Ixodes scapularis ([Ixodida]: [Ixodidae]) in South Dakota, and new record for #Amblyomma maculatum JMedEnt

Range expansion of #Amblyomma americanum and #Ixodes scapularis ([Ixodida]: [Ixodidae]) in South Dakota, and new record for #Amblyomma maculatum AbstractThis project documents the expanded zoogeographic ranges of the blacklegged #tick (#Ixodes scapularis Say) and lone star #tick (#Amblyomma americanum Linnaeus) within eastern South Dakota. The research involves 2 steps. First, #tick surveillance was conducted in the eastern counties of South Dakota, spanning March 2021 through August 2022. Surveillance took place along the edge habitat at any accessible natural areas that could be identified as suitable #tick habitat. All life stages and species of #ticks were collected using a white cloth #tick drag, preserved in ethanol, and frozen. Second, the collection of data was contextualized by comparison with prior data in the region to determine if, and to what extent, range expansion had occurred. Distribution maps were created for each year to represent areas where I. scapularis and A. americanum were reported, and changes in species establishment were displayed. This study focused primarily on the Southeastern region of the state, near where I. scapularis populations exist in bordering Minnesota, and A. americanum in Nebraska and Iowa. As of the 2022 sampling season, the only counties where I. scapularis and A. americanum appear to have overlapping ranges are Clay County and Union County. This study also yielded a state record for another human disease vector, the Gulf Coast #tick (#Amblyomma maculatum Koch) in 2021 and 2022. Target species of #tick were detected in nine counties in eastern South Dakota.

Range expansion of #Amblyomma americanum and #Ixodes scapularis ([Ixodida]: [Ixodidae]) in South Dakota, and new record for #Amblyomma maculatum JMedEnt

Co-feeding transmission of Heartland virus between the North American #tick, #Amblyomma americanum (Acari: Ixodidae), and the invasive East Asian #tick, Haemaphysalis longicornis (Acari: Ixodidae) AbstractHaemaphysalis longicornis Neumann is an invasive #tick species from East Asia with a rapidly expanding geographic range in the United States. In a laboratory setting, H. longicornis has been shown to support transovarial transmission of Heartland virus (HRTV; genus Bandavirus), an emerging #tick-borne pathogen responsible for human disease in the southern and midwestern United States. The native #Amblyomma americanum (L.) is the primary known vector of HRTV, and field surveillance studies have documented co-feeding of H. longicornis and A. americanum on shared hosts, raising questions about the potential for interspecies viral transmission. To investigate whether H. longicornis can acquire HRTV through co-feeding with infected A. americanum, we used a mouse model in which HRTV-infected A. americanum nymphs were co-fed with uninfected H. longicornis larvae or nymphs and screened recipient #ticks using q-RT-PCR. HRTV RNA was detected in H. longicornis collected from multiple mice, demonstrating interspecies co-feeding transmission of HRTV. Mouse blood samples were consistently negative for HRTV RNA, while some skin biopsies from #tick feeding sites were positive for the virus, indicating nonviremic co-feeding transmission. These findings provide the first experimental evidence that H. longicornis can acquire HRTV RNA through co-feeding with A. americanum and could contribute to its maintenance in nature, even in the absence of a known vertebrate reservoir host for HRTV.

Co-feeding transmission of Heartland virus between the North American #tick, #Amblyomma americanum (Acari: Ixodidae), and the invasive East Asian #tick, Haemaphysalis longicornis (Acari: Ixodidae) JMedEnt

Co-feeding transmission of Heartland virus between the North American #tick, #Amblyomma americanum (Acari: Ixodidae), and the invasive East Asian #tick, Haemaphysalis longicornis (Acari: Ixodidae) AbstractHaemaphysalis longicornis Neumann is an invasive #tick species from East Asia with a rapidly expanding geographic range in the United States. In a laboratory setting, H. longicornis has been shown to support transovarial transmission of Heartland virus (HRTV; genus Bandavirus), an emerging #tick-borne pathogen responsible for human disease in the southern and midwestern United States. The native #Amblyomma americanum (L.) is the primary known vector of HRTV, and field surveillance studies have documented co-feeding of H. longicornis and A. americanum on shared hosts, raising questions about the potential for interspecies viral transmission. To investigate whether H. longicornis can acquire HRTV through co-feeding with infected A. americanum, we used a mouse model in which HRTV-infected A. americanum nymphs were co-fed with uninfected H. longicornis larvae or nymphs and screened recipient #ticks using q-RT-PCR. HRTV RNA was detected in H. longicornis collected from multiple mice, demonstrating interspecies co-feeding transmission of HRTV. Mouse blood samples were consistently negative for HRTV RNA, while some skin biopsies from #tick feeding sites were positive for the virus, indicating nonviremic co-feeding transmission. These findings provide the first experimental evidence that H. longicornis can acquire HRTV RNA through co-feeding with A. americanum and could contribute to its maintenance in nature, even in the absence of a known vertebrate reservoir host for HRTV.

Co-feeding transmission of Heartland virus between the North American #tick, #Amblyomma americanum (Acari: Ixodidae), and the invasive East Asian #tick, Haemaphysalis longicornis (Acari: Ixodidae) JMedEnt

Parasitism of a US traveler by a nymphal #Amblyomma tapirellum Dunn, 1933 (Ixodida: Ixodidae) and review of exotic #tick interceptions on humans in the United States AbstractA resident of Monmouth County, New Jersey, United States removed an engorged nymphal #tick after returning from travel to Costa Rica. The #tick was identified by cox1 barcoding as #Amblyomma tapirellum  Dunn, 1933, a Central American species whose immature stages are undescribed. This species is associated with wet, tropical forests, and most host records come from Baird’s tapirs (Tapirus bairdii), though feeding on other mammalian orders and on humans has been observed. To date, no human pathogens have been detected in A. tapirellum, although very few specimens have been tested. The A. tapirellum reported here was screened for Rickettsia spp. via qPCR and additionally for bacterial pathogens via 16S amplicon sequencing, and no pathogens were detected. However, we report the presence of a Coxiella-like endosymbiont, common among ­#Amblyomma spp. We also briefly review 29 published records comprising 14 exotic hard #tick species removed from US travelers returning from abroad, most commonly #Amblyomma spp. from Africa. Due to the near-worldwide distribution of #ticks and #tick-borne disease as well as the growing frequency of international tourism, travelers are urged to prevent #tick bites and physicians are encouraged to be mindful not only of native #tick-borne diseases but potential exposure to exotic #tick-borne diseases. There is also a need to improve identification resources for ixodids and for existing resources to be made more accessible.

Parasitism of a US traveler by a nymphal #Amblyomma tapirellum Dunn, 1933 (Ixodida: Ixodidae) and review of exotic #tick interceptions on humans in the United States JMedEnt

Parasitism of a US traveler by a nymphal #Amblyomma tapirellum Dunn, 1933 (Ixodida: Ixodidae) and review of exotic #tick interceptions on humans in the United States AbstractA resident of Monmouth County, New Jersey, United States removed an engorged nymphal #tick after returning from travel to Costa Rica. The #tick was identified by cox1 barcoding as #Amblyomma tapirellum  Dunn, 1933, a Central American species whose immature stages are undescribed. This species is associated with wet, tropical forests, and most host records come from Baird’s tapirs (Tapirus bairdii), though feeding on other mammalian orders and on humans has been observed. To date, no human pathogens have been detected in A. tapirellum, although very few specimens have been tested. The A. tapirellum reported here was screened for Rickettsia spp. via qPCR and additionally for bacterial pathogens via 16S amplicon sequencing, and no pathogens were detected. However, we report the presence of a Coxiella-like endosymbiont, common among ­#Amblyomma spp. We also briefly review 29 published records comprising 14 exotic hard #tick species removed from US travelers returning from abroad, most commonly #Amblyomma spp. from Africa. Due to the near-worldwide distribution of #ticks and #tick-borne disease as well as the growing frequency of international tourism, travelers are urged to prevent #tick bites and physicians are encouraged to be mindful not only of native #tick-borne diseases but potential exposure to exotic #tick-borne diseases. There is also a need to improve identification resources for ixodids and for existing resources to be made more accessible.

Parasitism of a US traveler by a nymphal #Amblyomma tapirellum Dunn, 1933 (Ixodida: Ixodidae) and review of exotic #tick interceptions on humans in the United States JMedEnt

Rickettsia parkeri in Amblyomma americanum Ticks, Tennessee and Georgia, USA To determine the geographic distribution of the newly recognized human pathogen Rickettsia parkeri, we looked for this organism in ticks from Tennessee and Georgia, USA. Using PCR and sequence analysi...

mmwr cases of #rickettsia #parkeri seen in #amblyomma ticks pmc.ncbi.nlm.nih.gov/articles/PMC...

New research in #RESMedVetEnt

Metataxonomic profiles of bacterial and parasitic communities in #Amblyomma spp. #ticks collected from wildlife in Colombia: Implications for tick-borne diseases
doi.org/10.1111/mve.12823

#InsectVectors #InsectBorneDiseases #Metataxonomy
@wiley.com

Vector of the Month: #Amblyomma #ovale, a #Neotropical #tick transmitting #Rickettsia #parkeri, authored by Barbara Weck, Álvaro Faccini-Martínez, Marcelo Labruna & Sebastián Muñoz-Leal ‪@niaidnews.bsky.social‬ ‪@uspoficial.bsky.social‬ @udeconcepcion.bsky.social
authors.elsevier.com/a/1lPlh5Eb1x...

New #OpenAccess research in #RESMedVetEnt reports on the automated identification of spotted-fever #tick vectors using convolutional neural networks
doi.org/10.1111/mve.12822

#InsectVectors #InsectBorneDiseases #Amblyomma #Rickettsia #NeuralNetworks
@wiley.com

lone star tick or #Amblyomma americanum transmits

Ehrlichiosis
Tularemia
Heartland virus ❎doxy ❎rash
#Bourbon virus ❎doxy✅rash
Southern tick-associated rash illness (STARI)

About Bourbon Briefly understand the cause, symptoms, and ways to prevent it.

Engorged lone star tick #Amblyomma americanum vector of #bourbonVirus www.cdc.gov/bourbon-viru...

Successful completion of the life cycle of Amblyomma variegatum using tick artificial membrane feeding system The three-host tick Amblyomma variegatum, commonly known as the tropical bont tick, poses a major threat to livestock health and productivity in tropical and subtropical regions worldwide. This tick i...

🧬 New #preprint!
🎯 We completed the life cycle of Amblyomma variegatum using an artificial membrane feeding system — no live hosts! 🕷️🩸
👉 doi.org/10.21203/rs....
#ticks #OneHealth #vectorbiology #artificialfeeding #tropicaldiseases #Amblyomma #Ehrlichia #TeamScience

Graphical abstract of: Current and potential distribution of the neotropical hard tick Amblyomma patinoi (Ixodida: Ixodidae)

A new #RESMedVetEnt article presents current & potential distributions of the neotropical hard #tick #Amblyomma patinoi (Ixodida: Ixodidae) - models suggest its distribution could expand to Brazil, Peru & Venezuela under #ClimateChange scenarios🕷️

Read the article now🔽
doi.org/10.1111/mve.12804

Ehrlichia ruminantium (Ehrlichiaceae) infection rates and genotyping in #Amblyomma species from southern Africa Publication date: May 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 3 Author(s): Andeliza Smit, Fernando C. Mulandane, Stephane H. Wójcik, Choolwe Malabwa, Gourgelia Sili, Stephen Mandara, Kaïssa Plaisir Pineau, Sylvie Lecollinet, Antoni Exbrayat, Valérie Rodrigues, Hannah Rose Vineer, Zinathi Dlamkile, Wilhelm H. Stoltsz, Damien F. Meyer, Darshana Morar-Leather, Benjamin L. Makepeace, Luis Neves

Ehrlichia ruminantium (Ehrlichiaceae) infection rates and genotyping in #Amblyomma species from southern Africa Ticks&TBD

Ehrlichia ruminantium (Ehrlichiaceae) infection rates and genotyping in #Amblyomma species from southern Africa Publication date: May 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 3 Author(s): Andeliza Smit, Fernando C. Mulandane, Stephane H. Wójcik, Choolwe Malabwa, Gourgelia Sili, Stephen Mandara, Kaïssa Plaisir Pineau, Sylvie Lecollinet, Antoni Exbrayat, Valérie Rodrigues, Hannah Rose Vineer, Zinathi Dlamkile, Wilhelm H. Stoltsz, Damien F. Meyer, Darshana Morar-Leather, Benjamin L. Makepeace, Luis Neves

Ehrlichia ruminantium (Ehrlichiaceae) infection rates and genotyping in #Amblyomma species from southern Africa Ticks&TBD

Isolation, culture, and genome analysis of #Rickettsia oklahomensis sp. nov. (Rickettsiales: Rickettsiaceae) from #Amblyomma americanum (Acari: Ixodidae) Publication date: May 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 3 Author(s): Michael Karounos, Praveen Kumar Korla, James Wilson, Sarah Clarke, Susan Little, Barbara Qurollo

Isolation, culture, and genome analysis of #Rickettsia oklahomensis sp. nov. (Rickettsiales: Rickettsiaceae) from #Amblyomma americanum (Acari: Ixodidae) Ticks&TBD

Isolation, culture, and genome analysis of #Rickettsia oklahomensis sp. nov. (Rickettsiales: Rickettsiaceae) from #Amblyomma americanum (Acari: Ixodidae) Publication date: May 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 3 Author(s): Michael Karounos, Praveen Kumar Korla, James Wilson, Sarah Clarke, Susan Little, Barbara Qurollo

Isolation, culture, and genome analysis of #Rickettsia oklahomensis sp. nov. (Rickettsiales: Rickettsiaceae) from #Amblyomma americanum (Acari: Ixodidae) Ticks&TBD

In our January issue: From #invasion to #outbreak: #tick introductions and disease, authored by Payton Phillips & Mekala Sundaram. #Amblyomma #americanum #Rhipicephalus #microplus #Haemaphysalis #longicornis #Vector #Community @universityofga.bsky.social

www.cell.com/trends/paras...