Publications by authors named "Anna C B Mongruel"

Although vector-borne agents have been detected in different species of wild animals, studies involving tapirs (Tapirus terrestris), the largest land mammals in Brazil, are scarce. The aim of the present study was to investigate the occurrence and molecular identity of Anaplasmataceae agents, Coxiella burnetii and Hepatozoon spp. in blood samples of wild T.

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  • - This study analyzed the bacterial communities in the blood samples of 79 living and 7 road-killed lowland tapirs to understand their blood microbiota, highlighting the importance of studying blood alongside gut microbiomes.
  • - Researchers identified significant differences in bacterial diversity based on animal condition (living vs. road-killed), age, and location, revealing the presence of various vector-borne bacterial pathogens in the tapirs' blood.
  • - Using next-generation sequencing, the study provided new insights into the blood microbiome of lowland tapirs, suggesting potential microbial movement from other body areas to the bloodstream and the diagnostic utility of this approach for pathogen screening.
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Although bats (Mammalia: Chiroptera) act as natural reservoirs for many zoonotic pathogens around the world, few studies have investigated the occurrence of agents in bats, especially vampire bats. The family (order Rickettsiales) encompasses obligate intracellular bacteria of the genera , , , , , and . The present study aimed to investigate, using molecular techniques, the presence of species of , , and in vampire bats sampled in northern Brazil.

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Despite numerous reports of Anaplasmataceae agents in mammals worldwide, few studies have investigated their occurrence in birds. The present study aimed to investigate the occurrence and molecular identity of Anaplasmataceae agents in birds from the Pantanal wetland, Brazil. Blood samples were collected from 93 different species.

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  • Borrelia theileri is a tick-borne spirochete that causes health issues like fever and reduced food intake in cattle, and this study explores its presence in wild tapirs in South America.* -
  • Researchers collected blood samples from 99 tapirs across the Pantanal and Cerrado biomes, using a qPCR assay to detect B. theileri DNA, finding a low positive rate of 2% in tapirs from the Pantanal.* -
  • The study found sequences of B. theileri in tapirs closely related to previously detected sequences in cattle and various tick species from different regions, expanding knowledge on the potential hosts of this pathogen.*
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Hemotropic mycoplasmas are bacteria that attaches to erythrocytes surface, which some species presents zoonotic concerns. In the suborder Pinnipedia, genera Otaria and Arctocephalus are prominent in Brazil. This study investigated the occurrence of hemoplasmas in Arctocephalus sp.

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  • Leptospirosis is a zoonotic disease affecting both humans and animals, with pigs being significant carriers of the bacteria that cause it.
  • A study in Paraná, Brazil, tested 1,393 blood samples from backyard pigs and found a 15.87% prevalence of Leptospira antibodies, with Icterohaemorrhagiae, Butembo, and Pomona being the most common strains.
  • The study identified lack of rodent control as a major risk factor for infection, emphasizing the need for better housing, rodent management, and veterinary care to mitigate the spread of the disease.
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The genus Bartonella (Hyphomicrobiales: Bartonellaceae) encompasses facultative intracellular α-proteobacteria that parasite erythrocytes and endothelial cells from a wide range of vertebrate hosts and can cause disease in animals and humans. Considering the large diversity of vertebrate species that may act as reservoirs and arthropod species that may be associated with Bartonella transmission, the exposure of animals and humans to these microorganisms is likely underestimated. The present study aimed to investigate the occurrence of Bartonella sp.

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Opossums are synanthropic marsupials able to interchange among wild, peri‑urban and urban environments, playing an epidemiologically important role as hosts for emerging pathogens and ectoparasites of relevance in public health. The present study aimed to detect and molecularly characterize vector-borne agents in a population of common opossums (Didelphis marsupialis) from the Island of São Luís do Maranhão, northeastern Brazil. Of the 45 animals analyzed, one (2.

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There is a growing concern about the participation of wild hosts and reservoirs in the epidemiology of several pathogens, particularly within the context of environmental changes and the expansion of the One Health concept. The aim of this study was to investigate the presence of hemoplasmas in opossums rescued from the metropolitan region of Rio de Janeiro state, Brazil. Blood samples were collected from 15 Didelphis aurita and subjected to DNA extraction and PCR using primers for the 16S rRNA and 23S rRNA genes.

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The low-land tapir () is the largest wild terrestrial mammal found in Brazil. Although has been already reported as a host of hemoparasites, the occurrence and genetic identity of Piroplasmida agents in this species is still cloudy. Although it is reported that , an endemic equid-infective agent in Brazil, is occurring in lowland tapirs, these reports are probably misconceived diagnoses since they are solely based on small fragments of 18S rRNA that may not achieve accurate topologies on phylogenetic analyses.

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  • * Results showed significant rates of antibodies and DNA for Theileria equi, Babesia caballi, and hemotropic Mycoplasma sp. in horses, while Ehrlichia sp. was not detected in any horse samples.
  • * Tick species identified included Dermacentor nitens and Rhipicephalus microplus, with some ticks testing positive for hemoplasmas, marking the first recorded instance of Mycoplasma ovis infection in Brazilian horses and hemoplasma DNA in the ticks' salivary glands
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Health monitoring programs in animals used as experimental models are essential, since only disease-free subjects are considered suitable for research purposes. In laboratory-kept animals, hemoplasmas have been described as an important confounding variable. Different hemoplasma species have been detected infecting non-human primates (NHP) from Brazil.

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The present study aimed to investigate, by molecular techniques, the occurrence of Anaplasmataceae, Bartonellaceae, Rickettsiaceae, Mycoplasmataceae, Coxiellaceae, and Babesiidae/Theileriidae agents in blood samples of free-living wild boars (Sus scrofa) and associated ticks in south-eastern Brazil. For this purpose, 67 blood samples and 265 ticks (264 Amblyomma sculptum and one Amblyomma ovale) were analysed. In the screening for Anaplasmataceae agents by a PCR assay based on the 16S rRNA gene, 5.

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The lowland tapir () is the largest land mammal in Brazil and classified as a vulnerable species, according to the assessment of the risk of extinction. The present study aimed at investigating the occurrence and genetic diversity of hemoplasmas in free-ranging from the Brazilian Pantanal and Cerrado biomes. Blood samples were collected from 94 living and eight road-killed tapirs, totalizing 125 samples Conventional PCR targeting four different genes (16S rRNA, 23S rRNA, , and ) were performed, and the obtained sequences were submitted for phylogenetic, genotype diversity, and distance analyses.

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Although anemia has been historically linked to Haemonchus contortus infection, other infectious agents, such as hemotropic mycoplasmas and tick-borne disease pathogens, may also lead to anemic crisis in sheep. This study has aimed to investigate infections related to anemia in a sheep herd from Bandeirantes City, Paraná State, southern Brazil. Seven out of forty-two (16.

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Tick-borne diseases (TBD) constitute an important group of illness affecting animals and humans worldwide. In Brazil, carthorses are frequently exposed to ticks and tick-borne pathogens, leading to impairment of horse performance and imposing restrictions by the international veterinary authorities for the importation of horses. Accordingly, this study has aimed to i) determine the prevalence of the TBD agents Theileria equi, Babesia caballi, Ehrlichia spp.

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  • * Blood samples from eight opossums showed that 87.50% tested positive for Mycoplasma spp., with DNA sequencing revealing a 98.97% match with the strain found in the U.S.
  • * This research is significant as it represents the first detection of a potential new type of Mycoplasma infection in South American opossums.
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Arthropod-borne pathogens are medically important because of their ability to cause diseases in their hosts. The purpose of this study was to detect the occurrence of Ehrlichia spp., piroplasmids and Hepatozoon spp.

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  • * This study focused on detecting a pathogen related to A. phagocytophilum from a wild bird in Paraná, Brazil, collecting 15 blood samples from 11 bird species.
  • * A sample from a Penelope obscura bird tested positive, and genetic analysis placed it in the same group as A. phagocytophilum found in domestic cats in Brazil, marking the first detection of this pathogen in a bird in Paraná.
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Three species of hemoplasmas are known to infect monkeys, 'Candidatus Mycoplasma kahanei', 'Candidatus Mycoplasma haemomacaque' and 'Candidatus Mycoplasma aoti'. Marcgrave's capuchin monkey (Sapajus flavius) is a critically endangered neotropical primate species of the Brazilian Atlantic Forest, and thus, sustained efforts are needed to protect the health and well-being of these animals. This study has aimed to screen 12 captive S.

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Although the infection by Toxoplasma gondii in horses is usually asymptomatic, it may be characterized by the presence of tissue cysts and maintenance of detectable antibody titers. The aim of this study was to detect anti-T.gondii antibodies and to determine risk factors associated in sport horses from Paraíba State, Northeastern Brazil.

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Bacteria in the genus Anaplasma are responsible for diseases in animals and humans. Studies carried out in Brazil have demonstrated that Brazilian deer are able to act as hosts of agents in the family Anaplasmataceae and are possibly potential reservoirs of these pathogens. Molecular and phylogenetic studies have been carried out on samples of two gray brocket specimens (Mazama gouazoubira) from the city of Guarapuava, state of Paraná, Brazil, for the detection of Anaplasma sp.

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