Publications by authors named "C O Possamai"
We investigated demographic changes in three primate species (Alouatta guariba, Sapajus nigritus, and Callithrix flaviceps) at the Reserva Particular do Patrimônio Natural-Feliciano Miguel Abdala, Caratinga, Minas Gerais, Brazil, following a yellow fever outbreak (YFO) by comparing their population sizes before (2015) and after the outbreak (2017-2018), and by monitoring the size, composition, and reproductive status of groups from 2017 to 2021. Comparisons of pre- and post-YFO census data indicate the A. guariba population declined by 86.
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- Primate thanatology, the study of how primates respond to death, has seen increased interest but still lacks comprehensive data and quality reports.
- This research focuses on the northern muriqui, detailing seven specific cases of adult female responses to dead or dying infants observed from 1998 to 2020.
- Findings indicate adult females carried their deceased young for 1-3 days primarily during dry seasons, emphasizing the importance of long-term studies in documenting such rare behaviors in primates.
Free-living amoebae of the genus Acanthamoeba are causative agents of Acanthamoeba keratitis and amoebic encephalitis in humans, both of which are serious infections. The ability to produce proteases is one of the factors involved in the pathogenesis of Acanthamoeba infections. The aim of this study was to evaluate the secreted proteases of six Acanthamoeba strains from distinct genotypes (T1, T2, T4 and T11) maintained in prolonged axenic culture and following three successive passages in Madin-Darby Canine Kidney (MDCK) cells.
View Article and Find Full Text PDFUnderstanding the impact of zoonotic diseases on wild primate populations is important for assessing local extinction risks and for evaluating potential mitigating factors. Comparative data on demographic changes in two isolated populations of the northern muriqui (Brachyteles hypoxanthus) during a severe yellow fever outbreak in southeastern Brazil provide unique insights into the potential effects of this disease in this Critically Endangered species. From October 2016 to April 2017, the muriqui population at the Reserva Particular do Patrimônio Natural-Feliciano Miguel Abdala (Caratinga) lost 31 of its 324 members, or nearly 10%, whereas the population at the Reserva Particular do Patrimônio Natural-Mata do Sossego (Sossego) declined from 34 to 25 individuals, or 26%.
View Article and Find Full Text PDFThe authors recognized a mistake in Abstract and in the Discussion section.
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