Infección natural por Cytauxzoon felis en onza parda (Puma concolor) de vida libre proveniente de la región suroeste de Mato Grosso do Sul, Brasil

Abstract

RESUMO.Vários fatores como desmatamento e expansão da agricultura e pecuária tem promovido o contato próximo entre animais selvagens e domésticos, levando ao compartilhamento de patógenos, dentre eles o Cytauxzoon felis. O objetivo com este trabalho é relatar um caso de cytauxzoonose em Puma concolor de vida livre proveniente da região sudoeste de Mato Grosso do Sul, Brasil. O diagnóstico foi obtido por meio de microscopia de sangue periférico e reação em cadeia da polimerase, que neste relato, caracterizou-se como achado acidental, uma vez que manifestações clínicas associadas à doença não foram observadas. A detecção de Cytauxzoon felis alerta para a necessidade de estabelecer a importância epidemiológica dos animais selvagens e o risco que representam para as populações domésticas e selvagens de cativeiro em relação aos patógenos transmitidos por carrapatos. Palavras chave: cytauxzoonose, diagnóstico, piroplasmídeos, felino selvagem Natural infection by Cytauxzoon felis in brown ounce (Puma concolor) of free life from the southwest region of Mato Grosso do Sul, BrazilABSTRACT. Several factors such as deforestation and expansion of agriculture and livestock has promoted the close contact between wild and domestic animals, leading to the sharing of pathogens, including the Cytauxzoon felis. The aim of this study is to report a case of cytauxzoonose in a free-living Puma concolor from the southwest region of Mato Grosso do Sul, Brazil. The diagnosis was obtained through microscopy of peripheral blood smear and polymerase chain reaction, that in this report, was characterized as accidental finding, since clinical manifestations associated to disease were not observed. The

Natural infection and molecular detection of Cytauxzoon felis in a free-ranging Puma concolor in the state of Goiás, Brazil

“…after gone through a clinical course of the infection (RIZZI et al, 2015). Although, studies targeting detection of C. felis in wild felids have been carried out in Brazil (ANDRÉ et al, 2009;ANTUNES et al, 2018;FURTADO et al, 2017;SOUSA et al, 2018), data is still scarce. The current study aimed to detect C. felis in wild free-ranging P. concolor in the state of Goiás.…”

“…While the pathology and epidemiology of cytauxzoonosis has been studied in the USA (ZIEMAN et al, 2018), there have had isolated reports on the occurrence of this parasite in South America. In Brazil, cytauxzoonosis has been documented as fatal to exotic captive living lions (Panthera leo) (PEIXOTO et al, 2007), and subclinical infections have been documented in wild captive jaguars (Panthera onca), and free-ranging ocelots (Leopardus pardalis) and pumas (Puma concolor) (ANDRÉ et al, 2009;ANTUNES et al, 2018;SOUSA et al, 2018). FURTADO et al (2017) reported high prevalence of C. felis in free-ranging jaguars (all 30 animals tested positive) from three different Brazilian biomes, Cerrado, Pantanal and Amazon.…”

“…In addition, due to rapid development, erythroid cell regeneration may not be initially noticeable in acute conditions (HARVEy et al, 2007). Although, the positive parasitological diagnosis by PCR and visual identification in blood smears, allied to the absence of clinical signs compatible with the disease, followed by recovery without specific treatment, may indicate effectiveness of the immune system (ANTUNES et al, 2018). Another hypothesis is that the C. felis strain in question may be less pathogenic and therefore unable to cause disease (pathogenesis) in susceptible feline species (JULIANO et al, 2004), as most cases reported in Brazil are nonfatal and asymptomatic (ANDRÉ et al, 2009).…”

Fatal infection caused by Cytauxzoon felis in a captive-reared jaguar (Panthera onca)

“…In North America, bobcats ( Lynx rufus ) are the most common natural hosts and reservoirs of this protozoan, acting as source of infection for other felid species ( Garner et al, 1996 ; Zieman et al, 2018 ; Wang et al, 2017 ). In Brazil, including the state of Mato Grosso do Sul ( Antunes et al, 2018 ; Juliano et al, 2004 ), asymptomatic carriers of C. felis have been identified among domestic, wild, exotic free-ranging, and exotic captive-reared felids (bobcats, pumas, jaguars, and ocelots) ( André et al, 2009 , 2015 ; Filoni et al, 2012 ; Furtado et al, 2017b ; Wang et al, 2017 ; Raimundo et al, 2021 ). Despite the detection of this protozoan predominating in wild felids, cases of infections in domestic felids are increasing, including in Brazil.…”