Acute gastroenteritis is one of the main causes of mortality in humans and young animals. Domestic and mainly wild animals such as bats, small rodents and birds are highly diversified animals in relation to their habitats and ecological niches and are widely distributed geographically in environments of forest fragmentation in some areas of the Amazon, being considered important sources for viruses that affect humans and other animals. Due to the anthropical activities, these animals changed their natural habitat and adapted to urbanized environments, thus representing risks to human and animal health. Although the knowledge of the global diversity of enteric viruses is scarce, there are reports demonstrating the detection of rotavirus in domestic animals and animals of productive systems, such as bovines and pigs. The present study investigated the prevalence of Rotavirus A in 648 fecal samples of different animal species from the northeastern mesoregion of the state of Pará, Brazil, which is characterized as an urbanized area with forest fragments. The fecal specimens were collected from October 2014 to April 2016 and subjected to a Qualitative Real-Time Polymerase Chain Reaction (RT-qPCR), using the NSP3 gene as a target. It was observed that 27.5% (178/648) of the samples presented positive results for RVA, with 178 samples distributed in birds (23.6%), canines (21.35%), chiropterans (17.98%), bovines (14.6%), horses (8.43%), small rodents (6.74%), pigs (3.93%) and felines (3.37%), demonstrating the circulation of RVA in domestic animals and suggesting that such proximity could cause transmissions between different species and the occurrence of rearrangements in the genome of RVA as already described in the literature, associated to the traces of environmental degradation in the studied areas.

The present study reports the occurrence of rotavirus A (RVA), rotavirus D (RVD), rotavirus F (RVF), rotavirus G (RVG), and picobirnavirus (PBV) in fecal specimens of wild (n = 22), and exotic birds (n = 1) from different cities of Pará state. These animals were hospitalized at Veterinary Hospital of the Federal University of Pará, Brazil, in a period from January 2018 to June 2019. The animals exhibited different clinical signs, such as diarrhea, malnutrition, dehydration, and fractures. The results showed 39.1% (9/23) of positivity for RVA by RT-qPCR. Among these, one sample (1/9) for the NSP3 gene of T2 genotype was characterized. About 88.9% (8/9) for the VP7 gene belonging to G1, G3 equine like and G6 genotypes, and 55.5% (5/9) for the VP4 gene of P[2] genotype were obtained. In the current study, approximately 4.5% of the samples (1/23) revealed coinfection for the RVA, RVD and RVF groups. Furthermore, picobirnavirus (PBV) was detected in one of the 23 samples tested, and was classified in the Genogroup I. The findings represent the first report of RVA, RVD, RVF, RVG, and PBV genotypes in wild birds in Brazil, and due to wide distribution it can implies potential impacts of RVs, and PBVs on avian health, and other animals contributing to construction of new knowledge, and care perspectives. The anthropic action in the Amazon region directly influences the relationship among pathogens, and animal hosts. This kind of action could move different species of animals from their natural habitat to urban or rural areas, which can lead to the dispersion of different etiological agents such rotavirus and picobirnavirus, showing their zoonotic potential, and increasing their genetic diversity. This study detected the circulation of rotavirus in 9/23 samples of wild, and exotic avian, and 1/23 for picobirnavirus from different cities of Pará state, Brazil. We report the first occurrence of rotavirus A, D, F, G, and Genogroup I of picobirnavirus in wild, exotic birds in Brazil, and worldwide. Our data correlated the pathogens with cities, and symptoms. The data emphasize the scarce of epidemiological monitoring of these pathogens, and the importance of epidemiological studies to obtain the ecology, and evolution of rotavirus, and picobirnavirus in animals population as well as the negative impacts in animal health.

This study aimed to detect picobirnavirus (PBV) in the fecal samples of wild and domestic animals from 2014 to 2016 in the Amazon biome. Fecal samples from different animals, including birds (n = 41) and mammals (n = 217), were used. The PAGE test showed negativity for PBV. However, 32 samples (12.4%, 32/258) showed positive results in RT-PCR analyses. Among the positive samples, pigs and cats, both with 28.12% (9/32), registered the highest frequencies. In a phylogenetic analysis, eight sequences from positive samples were grouped in the Genogroup 1 of PBV (PBV GI). PBV occurrence was significantly related to cats and pigs but not other mammals or birds, independently of their geographical origin. A nucleotide analysis demonstrated similarity among the feline group but the absence of a defined structure between the clades. PBVs are highly widespread viruses that can affect the most diverse types of hosts in the Amazon biome, including humans.

The complex life cycle of the malaria parasite Plasmodium requires the parasite to adequately adapt to different conditions. For this reason, Plasmodium strictly controls its gene expression, and given its evolutionary distance from the human host, the involved factors may figure as attractive potential drug targets. In recent years, several unique transcription factors and chromatin modifiers have been identified and partially characterized in Plasmodium falciparum and in the murine species P. yoelii and P. berghei. This review unites data from studies focusing on drug development against enigmatic plant-like AP2-transcription factors and chromatin modifiers, such as histone acetyl transferases and deacetylases and histone methyltransferases and demethylases. Considering the reported success of inhibition of both factors, these may be included as targets to effectively combat the parasite by perturbing its control of gene expression.

This study aimed to detect picobirnavirus (PBV) in the fecal samples of wild and domestic animals from 2014 to 2016 in the Amazon biome. For detection, Polyacrylamide Gel Electrophoresis (PAGE) and RdRp gene based Polymerase Chain Reaction (PCR) preceded by Reverse Transcription (RT) were used. Subsequently, statistical analyses were performed using the Chi-square G test and nucleotide analyses for the construction of the phylogenetic tree. A total of 258 fecal samples from different animals, including birds (n=41) and mammals (n=217) were used. The PAGE test showed negativity for PBV genome in all samples while in the RdRp gene based RT-PCR test 32 samples showed amplification, corresponding to 12.4% (32/258) positivity. Among the positive samples, mammals, including pigs and cats, both with 28.12% (9/32), registered the highest frequencies, and in birds, the positivity was 4.9% (2/41). In phylogenetic analysis, eight sequences from positive samples grouped in the genogroup 1 of PBV (GI). The statistical test was significant for PBV in relation to the groups of animals studied (birds, mammals, and rodents), and in relation to the cities of origin of the samples, with a value of p <0.05. Nucleotide analysis demonstrated similarity among the feline group, but the absence of a defined structure between the clades. PBVs are highly widespread viruses that can affect the most diverse types of hosts in the Amazon biome.

Wild birds have great prominence on transmission of diseases to humans, mainly due to their ease of access to human population, raising concerns about the potential impact of that proximity in context of the One Health. Studies referring to circulation of avian reovirus (ARV) and picobirnavirus (PBV) in wild birds are limited, in addition to reinforcing the development of researches that describe the prevalence, characterize the variants and evaluate the potential impact of these infections on the wild ecosystem and public health. The present study reports the occurrence of ARV and PBV in wild birds collected from an environmental protection area in the Amazon biome. RT-PCR analysis showed ARV infection prevalence in 0.6% (1/155) and PBV infection in 1.29% (2/155) on the samples. ARV strain isolated in this study demonstrated more phylogenetically related to other ARVs previously circulating in poultry in the same region. The two PBV strains obtained belong to genogroup I, and showed phylogenetically related to other PBV isolated from different animal species in different geographic regions. This study is a pioneer in the detection of ARV in wild birds in Brazil and presents a report of the first occurrence of PBV in wild birds of Guira guira specie. Additional studies in wild birds are required to increase the epidemiology, origin, evolution and emergence of new viruses that may provoke problems in the context of One Health.