Marcelo B. Labruna results 70
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Bokermannohyla frogs comprise species distributed across different Brazilian biomes, several of which are currently listed as endangered species. These anurans host a diversity of parasites that may negatively affect their survival. Several tick species of the family Argasidae and chigger mites of the family Leeuwenhoekiidae exhibit host specificity toward this group. Here, we report a case of co-parasitism by argasid ticks an...
Within Argasidae ticks, the genus Antricola is restricted to the New World and exhibits a unique biology: only larvae are hematophagous and parasitize bats, whereas nymphs and adults are free-living and supposedly to feed on bat guano in hot caves with high temperatures (30–38 °C) and relative humidity close to 100%. This study quantified the tick population in an Amazonian hot cave located in the Natural Park of Porto Velho (...
Transstadial and transovarial perpetuations of Borrelia venezuelensis in Ornithodoros rudis, with demonstration of vector competenceNARA Subscribed
Ticks of the genus Ornithodoros are recognized vectors of relapsing fever group Borrelia , such as Borrelia venezuelensis , whose infection dynamics in its vector, Ornithodoros rudis , remains poorly understood in Brazil. This study aimed to investigate the transstadial perpetuation and transovarial transmission of B. venezuelensis in O. rudis and the vector competence of all parasitic stages of this tick species. Experimental...
In southeastern Brazil, capybaras ( Hydrochoerus hydrochaeris ) are main hosts of the ticks Amblyomma dubitatum and Amblyomma sculptum ; the latter has great medical importance for being the main vector of Rickettsia rickettsii , the agent of Brazilian spotted fever (BSF). This study aimed to quantify ticks in areas invaded and not invaded by exotic plants ( Hedychium coronarium , Cenchrus purpureus or Megathyrsus maximus ) wi...
Coxiella burnetii in ruminants from SomaliaNARA Subscribed
Q fever in humans and coxiellosis in ruminants are caused by Coxiella burnetii , a zoonotic obligate intracellular bacterium. This infection poses significant health and economic risk. Effective control strategies rely on a thorough understanding of their epidemiology. In this study, we examined the prevalence of C. burnetii in 372 ruminants (190 goats, 133 cattle, and 49 sheep) from the Lower Shabelle and Benadir Regions of S...