Publications by authors named "Pedro Enrique Navas Suarez"

Article Synopsis
  • * In a study conducted in Brazil, researchers examined 15 stranded seabirds (including Cory's and Great Shearwaters) and found that 20% tested positive for herpesvirus, specifically identifying novel strains of the virus.
  • * The findings highlight a lack of data on infectious agents in seabirds and emphasize the need for further research to better understand the herpesvirus's impact on these species and support their conservation efforts.
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Emerald tree boas (Corallus batesii) are boids that in situ occurs in forested habitats in the Amazon Basin. The mycobacterial species can infect reptiles but the species Mycolicibacterium fortuitum was identified only in feces samples of ex situ Python regius and was isolated from granulomatous lesions of an ex situ Iguana iguana when was still part of the genus Mycobacterium. This article aims to report a mycobacteria infection case in a female Corallus batesii kept under human care.

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  • Neotropical primates, like brown howler monkeys, usually don't show signs of active tuberculosis (TB).
  • An injured brown howler monkey was discovered in an urban area, and medical examinations showed inflammation in its lungs, lymph nodes, and liver.
  • Testing confirmed the monkey was infected with Mycobacterium tuberculosis, emphasizing the need for TB monitoring in nonhuman primates.
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The giant anteater () is a vulnerable species in South America and is considered endangered or near extinction in Central America. Therefore, studies describing the reproductive characteristics of this species are pivotal for its conservation. Thus, this study aimed to provide a morphological description of the female reproductive tissues of this species.

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Yellow Fever (YF) is a viral arbovirosis of Public Health importance. In Brazil, surveillance is focused mainly on detecting epizootic events of Platyrrhini. Herein, we compared the detection and phylogenetic analysis of YF virus in two neotropical primates (NTP), a Callithrix detected in the previous epidemic period (2016-2020), and a Callicebus nigrifons, showing a new introduction of YF in 2023.

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Background: The Vieira's titi monkey (Plecturocebus vieirai) was recently described and characterized as endemic to Brazil. According to the IUCN red list, this species is classified as critically endangered (CR). At the date of the publication of this manuscript, there are no published data on the health aspects of this species.

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Opossums are considered resistant to rabies. Nonhematophagous bats are reservoirs of rabies in urban areas of South America. We analyzed bats and opossums tested for rabies during 2021 in a highly urbanized city in Brazil to understand spillover in an urban setting.

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The maned wolf () is the largest South American canid. In Brazil, as in other countries, it is considered an endangered species. Habitat loss, landscape changes, hunting, and roadkill are the main threats to this species.

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Article Synopsis
  • The case describes a hoary fox pup in Brazil, co-infected with canine distemper virus (CDV) and canine adenovirus type 1 (CAdV-1), which showed severe health issues leading to euthanasia.
  • Pathological findings included mild hepatitis, bronchopneumonia, and corneal problems, with CDV and CAdV-1 antigens identified in various organs through immunohistochemistry.
  • The study highlights the importance of monitoring wildlife diseases to recognize potential conservation threats and the need for mitigation measures.
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Mucormycosis is rarely described in Platyrrhines. Herein, we describe the pathologic and molecular features of a gastric and hepatic infection by Mucor indicus in a marmoset (Callithrix sp.).

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  • Equid herpesvirus (EHV) poses significant threats to horses, leading to neurological and respiratory issues as well as spontaneous abortions, which impact the equine industry economically.
  • In a case study in Brazil, 11 foals died with respiratory and neurological symptoms, alongside abortions in mares, prompting investigation using clinical and laboratory exams.
  • Results indicated the first confirmed outbreak of EHV-2 in Brazilian horses, highlighting its role in equine respiratory diseases and foal mortality, with EHV-2 DNA identified in one foal's serum.
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  • Depression, particularly postpartum depression (PPD), impacts about one in seven women globally and can affect the mother-child bond and the newborn's development.
  • This study focuses on the effects of ketamine as a treatment for PPD in lactating rat mothers, evaluating its safety and effects on the cardiovascular system and behavior during maternal separation stress.
  • Results indicate that ketamine could be a safe option for treating postpartum depression without causing harm to the cardiovascular or urinary systems of lactating mothers.
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Knowledge of reproductive health in wild southern tamanduas (; Mammalia: Myrmecophagidae) is fragmentary. During necropsies of roadkill xenarthran species in Brazil, a case of ovarian filariasis in an adult female southern tamandua was observed. Macroscopically, both ovaries were irregularly enlarged and had numerous smooth protuberances.

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  • Brazilian porcupine poxvirus (BPoPV) was identified in a free-ranging adult male hairy dwarf porcupine exhibiting severe skin lesions and lethargy in Brazil.
  • Diagnosis was confirmed through various methodologies, including histopathology and electron microscopy, which revealed characteristic viral inclusion bodies and large brick-shaped virions.
  • Following a comprehensive treatment plan that involved antibiotics and supportive therapies, the porcupine's skin lesions regressed, and post-treatment evaluations showed no remaining viral presence or significant pathology.
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Toxoplasmosis is a zoonotic disease caused by the ubiquitous coccidia Toxoplasma gondii. Rodents play an important role in maintaining its life cycle, as they are one of the main diet sources for felids (wild and domestic), the unique definitive hosts. However, reports of toxoplasmosis in porcupines (Order Rodentia) are uncommon, with gaps concerning its pathophysiology.

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Landscape transformation favors the spread of new pathogens that can be shared between domestic and wild animals. Certain adenoviruses (e.g.

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  • - River dolphins, which include the Amazon and Bolivian species, are a threatened group of cetaceans, and a study was conducted to investigate the presence of herpesviruses in their populations.
  • - The survey found herpesvirus DNA in 59.1% of Bolivian river dolphins and 51.9% of franciscana dolphins, while all Amazon river dolphins tested negative for herpesviruses.
  • - Two different types of herpesviruses were identified in the Bolivian river dolphins, including a novel strain, and a new gammaherpesvirus was discovered in franciscana samples, suggesting a complex evolutionary history between viruses and their hosts.
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  • Chelonid alphaherpesvirus 5 (ChHV5) is linked to fibropapillomatosis (FP), a serious disease affecting sea turtles worldwide.
  • Research detected ChHV5 DNA in various tissues of both FP+ (affected) and FP- (unaffected) green sea turtles, revealing a persistent infection.
  • High levels of ChHV5 were found in lungs of FP- turtles, suggesting that many may carry the virus without showing symptoms, indicating that other factors might play a role in causing FP.
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In 2017, an adult male South American sea lion (Otaria byronia), presenting emaciation and a cervical abscess, stranded alive in Florianópolis, southern Brazil. The animal was directed to a rehabilitation center, dying a few days later. On necropsy, the main gross findings were necrotizing lymphadenitis of the right prescapular lymph node and nodular bronchopneumonia.

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Article Synopsis
  • Wildlife research has revealed an increase in viral-related cancers, potentially due to more studies and rising cancer-causing pathogens.
  • A case of primary gastric T-cell lymphoma was found in a giant armadillo in Brazil, linked to a new virus identified as Cingulatid gammaherpesvirus 1 (CiHV-1).
  • The virus was detected in 14.3% of other giant armadillos tested, raising concerns about its oncogenic potential and the need for further research on its impact.
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Magellanic penguins (Spheniscus magellanicus) migrate to the continental shelf of southern-southeastern Brazil during austral winter. Stranded penguins are directed to rehabilitation centers, where they occasionally develop fungal diseases. Aspergillosis, a mycosis caused by Aspergillus spp.

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  • Knowledge of infectious diseases in wildlife is critical for preventing zoonotic outbreaks, with adiaspiromycosis being a neglected disease in humans caused by specific fungi.
  • This study investigated roadkilled armadillos to understand the occurrence and pathology of adiaspiromycosis, discovering cases in both the six-banded and southern naked-tailed armadillos.
  • Twelve instances of pulmonary adiaspiromycosis were identified, revealing a potentially new species of fungus, raising concerns about its implications for human health and public safety.
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  • Antimicrobial-resistant bacteria are emerging in wildlife, raising concerns about their impact on wildlife health, particularly for endangered species like the critically endangered Brazilian merganser.
  • A fatal case of sepsis linked to a multidrug-resistant Escherichia coli strain was identified in an 8-day-old Brazilian merganser, with significant lesions found in various organs.
  • The study reveals that the E. coli strain has a broad resistome against multiple antibiotics and virulence factors, leading to the death of the merganser, emphasizing the risk these pathogens pose to wildlife.
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