Evaluation of the transmission of Anaplasma marginale by Amblyomma tonelliae.

This study aimed to evaluate A. marginale transstadial (TST) and transovarial transmission (TOT) by Amblyomma tonelliae through vector competence assays and analysis of natural infection in free-living ticks. This three-host tick species was chosen as model because it is a usual parasite of cattle in all their parasitic stages, making them potential vectors through TST or TOT.

Established populations of Ixodes silvanus (Acari: Ixodidae) in the Chaco Serrano, Argentina.

The aim of the study was to report the occurrence of Ixodes silvanus outside its distribution range, in the Chaco Serrano vegetation unit of the Chaco Phytogeographic Province, central Argentina. Ticks were collected from vegetation and on birds between November 2021 and December 2023. A possible seasonal activity was observed in the immature stages of I.

Serovar Infantis KPC-2 Producer: First Isolate Reported in Ecuador.

Antimicrobial resistance is currently considered a public health threat. Carbapenems are antimicrobials for hospital use, and Enterobacterales resistant to these β-lactams have spread alarmingly in recent years, especially those that cause health care-associated infections. The gene is considered one of the most important genetic determinants disseminated by plasmids, promoting horizontal gene transfer.

Wild birds as hosts of ticks (Acari: Ixodidae) and Anaplasmataceae (Rickettsiales) in the Atlantic rainforest ecoregion, Argentina.

This study aimed to assess the presence of Anaplasma, Ehrlichia and Rickettsia species infecting wild birds and their associated ticks in two localities: Moconá Provincial Park (MPP) and Piñalito Provincial Park (PPP), within the Atlantic rainforest ecoregion of Argentina. A total of 142 birds were captured representing 34 species, 28 genera, 15 families and five orders. Ticks were collected from 33 of these birds, comprising 19 species, 14 genera and one order.