The enteric protist Blastocystis is one of the most frequently reported parasites infecting both humans and many other animal hosts worldwide. A remarkable genetic diversity has been observed in species, with 17 different subtypes (STs) on a molecular phylogeny based small subunit RNA genes (SSU rDNA). Nonetheless, information regarding its distribution, zoonotic potential remains still scarce, especially groups than primates. In Brazil, only few surveys limited to human isolates have so far...

Chagas disease was investigated in four periurban areas of Ceará state, northeastern Brazil, through serological, parasitological and molecular methods humans, reservoirs vectors. A cross-sectional survey revealed a seroprevalence rate 1.2% (13/1076 residents, six also proving positive PCR). Trypanosoma cruzi infection not detected children under 10 years old. Triatoma pseudomaculata prevailed the peridomiciles: 63 specimens, 69% (34/49) infected with trypanosomatids. Rhodnius nasutus...

Mammarenavirus species are associated with a specific rodent host species, although an increasing number of virus has been to more than one host, suggesting that co-evolution is less robust initially thought. There few eco-epidemiological studies South America mammarenaviruses in non-endemic areas Arenavirus Hemorrhagic Fever, affecting specially our current knowledge about animal reservoirs and range host-virus relations. In Brazil, seven arenavirus were described different species. Here we...

Land use changes and biodiversity loss critically disrupts ecosystem functioning are major drivers of infectious disease outbreaks. Trypanosoma cruzi , the agent Chagas disease, is a multi‐host parasite whose epidemiology has changed due to expansion anthropogenic activities over natural areas. We aimed understand ecological processes increasing prevalence at individual, community landscape levels using largest database on small mammal infection by T. in Brazil. applied machine learning...

The Bartonella species are zoonotic agents that infect mammals and transmitted by arthropod vectors. Approximately 18 distinct genotypes cause diseases in humans, may be spread both domestic wild animals. In Brazil, have been identified several of mammals, the present study, we analyzed samples from non-human primates (marmosets), marsupials, rodents, bats, compared them with described to examine distribution two impacted areas Rio de Janeiro state, southeastern Brazil. We used polymerase...

In this study we analyze population dynamics of hantavirus rodent hosts and prevalence infection over a 2-year period in Southern Brazil, region with high incidence pulmonary syndrome. The 14 small mammal species captured were composed 10 rodents four marsupials, the six most abundant being Akodon serrensis , Oxymycterus judex montensis paranaensis Oligoryzomys nigripes Thaptomys nigrita . These displayed similar pattern increasing sizes fall/winter caused by recruitment both, increase...

Hantaviruses, family Bunyaviridae, are rodent-borne RNA viruses that have caused cases of hantavirus cardiopulmonary syndrome (HCPS) in various regions the Americas. There five hantaviral lineages associated with HCPS Brazil: Juquitiba virus (JUQV), Araraquara (ARAV), Laguna Negra-like (LNV), Castelo dos Sonhos (CASV), and Anajatuba (ANAJV). Three additional hantaviruses been described rodents alone: Rio Mearim virus, Jaborá a lineage related to Seoul virus. This study describes genetic...

Over 1100 cases of hantavirus pulmonary syndrome (HPS) have occurred in Brazil since 1993, but little is known about Brazilian hantaviruses, and many their rodent hosts remain unknown. The Araucaria (ARAUV) was described recently from HPS patients Paraná, southern Brazil, its host could not be identified. In this study, rodents were captured regions with high prevalence to address issue. ARAUV RNA detected three distantly related species: Oligoryzomys nigripes, Oxymycterus judex Akodon...

Paraná state presents the fourth highest number of accumulated cases hantavirus pulmonary syndrome in Brazil. To map risk areas for transmission we carried out a study based on rodent trapping and determined anti-hantavirus seroprevalence these animals inhabitants localities. Overall rodents humans were 2.5% 2.4%, respectively. Eighty-two percent seropositive genetically analyzed. Phylogenetic analyses revealed that hantaviruses from samples cluster with Araucária (Juquitiba-like) or Jaborá...

Mammarenavirus RNA was detected in Musser's bristly mouse (Neacomys musseri) from the Amazon region, and this detection indicated that rodents were infected with a novel mammarenavirus, proposed name Xapuri virus (XAPV), which is phylogenetically related to New World Clade B C viruses. XAPV may represent first natural reassortment of Arenaviridae family new unrecognized clade within Tacaribe serocomplex group.

The Atlantic Forest is one of the most disturbed Brazilian biomes, with 183 out 298 species mammals occurring in state Rio de Janeiro. In this study, we aimed to characterize diversity, community structure, and habitat use small FIOCRUZ Campus (CFMA), including areas Pedra Branca State Park (PBSP, subunit Pau da Fome), We also compared diversity composition between two moments 15 years apart (2001 2012–2015) analyzed population dynamics marsupial Didelphisaurita (Wied-Neuwied, 1826). Small...

Leptospira is a bacteria that causes leptospirosis and transmitted through water, soil, or mud contaminated by the urine of infected animals. Although it mainly associated with urban environment, Leptospires also circulate in rural wild environments. This study aimed to investigate role small mammals epidemiology western Amazon, Brazil. In total, 103 animals from 23 species belonging orders Didelphimorphia Rodentia were captured. Blood, kidney, samples collected Microscopic Agglutination...

We report the results of an investigation into a fatal case hantavirus pulmonary syndrome (HPS) in Rio de Janeiro State, Brazil, where disease had not been reported previous to 2015. Following notification HPS case, serum samples were collected from household members and work contacts patient tested for antibody hantaviruses. Seroprevalence 22% (10/45) was indicated out 45 human tested. Blood tissue 72 rodents during fieldwork evaluate prevalence infection, by using enzyme-linked...

We characterised hantaviruses circulating in different Akodon rodent species collected midwestern Santa Catarina (SC), southern Brazil, where the Jabora hantavirus (JABV) strain was first identified montensis. Genetic and phylogenetic analyses based on a partial S segment indicated that, SC, paranaensis A. montensis carried same type of hantavirus. Additionally, we conducted genomic characterisation complete from Brazilian JABV strain. This is report infected with JABV.

Ecological studies of host-parasite interactions are common in rodents. However, despite the widespread occurrence endoparasites those animals, there is a lack information about community structure these parasites. The aims this study were to describe species composition and helminths rodents Oligoryzomys nigripes , Akodon montensis Euryoryzomys russatus (Rodentia, Sigmodontinae), investigate influence host species, age gender on abundance prevalence helminths. pattern metacommunity A. was...

During the Brazilian slavery period, many African migrants were brought to American continent. Historically, some of these escaped from gold mines and farms which they had been settled in remote valleys this was main mode resistance system. These runaway-slave descendant communities are called quilombos, a group with distinct ethnic identity, specific behavioral habits, including geographic isolation conservative practices. The objective study investigate prevalence rodent-borne viruses two...

The swamp rats are distributed in Argentina, southern Paraguay, Uruguay and Brazil, with two species currently accepted: Scapteromys aquaticus Thomas, 1920 tumidus Waterhouse, 1837. While S. occurs Paraguay western Uruguay, Brazil Uruguay. Here we report for the first time occurrence of gallery forest remnants Southern Brazil. Karyologic analysis showed 2n = 32 FNa 40. Phylogenetic analyses, based on DNA sequences from mitochondrial cytochrome-b gene indicate that Brazilian Argentinian...

South American histricognath rodents Thrichomys apereoides laurentius and pachyurus are natural hosts of Trypanosoma cruzi, agent Chagas disease. We established breeding colonies these species to serve as experimental models in various parasitological studies. Both have all the requirements necessary become excellent laboratory models: they can be easily maintained standard conditions breed throughout year do not any special dietary demands fed by food pellets designed for mice. produce...

The predominant landscape of the Atlantic Forest Brazilian state Rio de Janeiro is made up forest fragments surrounded by a matrix modified habitat, which may influence occurrence and distribution host species their parasites in comparison with original continuous forest. present study describes structure, composition, diversity helminth community found rodents two areas an open different status conservation. abundance, intensity, prevalence were calculated for each rodent species. biotic...

Small mammals (marsupials and rodents) are one of the most diverse groups Atlantic Forest mammals, representing 40% total diversity in this biome. Some regions, such as northwestern Rio de Janeiro state, have gaps mammal inventories. Therefore, we performed small inventories four fragmented landscapes state using live traps camera traps. Capture transects were placed both forest fragments altered matrix. We captured six species marsupials, Sigmodontinae rodents echimyid rodent. The fauna...