7 research outputs found
Dieta de morcegos filostomĂdeos (Mammalia, Chiroptera, Phyllostomidae) em fragmento urbano do Instituto SĂŁo Vicente, Campo Grande, Mato Grosso do Sul
Os morcegos (Chiroptera), devido Ă sua diversidade e abundĂąncia exercem um importante papel ecolĂłgico para o ecossistema. O objetivo deste trabalho foi reportar a dieta das espĂ©cies de morcegos frugĂvoros capturados nos fragmentos do Instituto SĂŁo Vicente, zona urbana do municĂpio de Campo Grande, MS. As coletas ocorreram entre setembro de 2011 e Junho de 2012, sendo realizadas com o auxĂlio de redes-de-neblina. Foram realizadas 154 capturas, com ocorrĂȘncia de 10 espĂ©cies representantes de trĂȘs famĂlias, sendo predominantes as espĂ©cies frugĂvoras. Dentre as capturas foram obtidas 41 amostras fecais, onde se verificou a presença de polpa, vestĂgios de artrĂłpodes e sementes. O recurso mais utilizado por quirĂłpteros foram plantas pioneiras, constatado atravĂ©s do predomĂnio de sementes da espĂ©cie Cecropia pachystachya, consumida em maior intensidade por Artibeus lituratus. Os resultados ressaltam a importĂąncia destes animais no ambiente, em especial no processo de regeneração dessas ĂĄreas atravĂ©s da dispersĂŁo de sementes.Due to their abundance and diversity, bats (Chiroptera) play an important ecological role in the ecosystem. The objective of this study was to report the diet of fruit bat species captured in fragments of the Instituto SĂŁo Vicente, Campo Grande, MS. The study was carried out September 2011 and June. We captured 154 individuals belonging to 10 species, and the frugivorous were predominant. 41 fecal samples were collected, demonstrating the presence of pulp, seeds and traces of arthropods. The resources most used by bats were pioneer plants, evidenced by the predominance of seeds of Cecropia pachystachya, consumed by Artibeus lituratus. The results shows the importance of these animals for seed dispersal
Dieta de morcegos frugĂvoros em remanescente de Cerrado em Bandeirantes, Mato Grosso do Sul
http://dx.doi.org/10.5007/2175-7925.2014v27n2p129A frugivoria Ă© difundida entre mamĂferos e aves, que consomem mais de 75% das espĂ©cies de frutos de ĂĄrvores tropicais. O objetivo deste estudo foi caracterizar a dieta das espĂ©cies de morcegos frugĂvoros capturados na Fazenda Cervinho no municĂpio de Bandeirantes/MS. A captura dos morcegos ocorreu com redes de neblina, em regiĂ”es da Reserva Legal, Ărea de Proteção Permanente e Mata Ciliar. A anĂĄlise da dieta foi realizada atravĂ©s da frequĂȘncia de ocorrĂȘncia dos recursos encontrados nas amostras. Foram capturados 160 indivĂduos pertencentes Ă famĂlia Phyllostomidae, com ocorrĂȘncia de seis espĂ©cies, com predominĂąncia de espĂ©cies frugĂvoras. Foram coletadas 51 amostras fecais, onde foi identificada a presença de polpa, pĂłlen, vestĂgios de artrĂłpodes e sementes. Houve predominĂąncia de sementes de Piper sp., representado em mais da metade das amostras. As sementes encontradas nas fezes dos quirĂłpteros na ĂĄrea de estudo sĂŁo de espĂ©cies pioneiras, ressaltando sua importĂąncia no processo de regeneração
Dieta de morcegos filostomĂdeos (Mammalia, Chiroptera, Phyllostomidae) em fragmento urbano do Instituto SĂŁo Vicente, Campo Grande, Mato Grosso do Sul
Os morcegos (Chiroptera), devido Ă sua diversidade e abundĂąncia exercem um importante papel ecolĂłgico para o ecossistema. O objetivo deste trabalho foi reportar a dieta das espĂ©cies de morcegos frugĂvoros capturados nos fragmentos do Instituto SĂŁo Vicente, zona urbana do municĂpio de Campo Grande, MS. As coletas ocorreram entre setembro de 2011 e Junho de 2012, sendo realizadas com o auxĂlio de redes-de-neblina. Foram realizadas 154 capturas, com ocorrĂȘncia de 10 espĂ©cies representantes de trĂȘs famĂlias, sendo predominantes as espĂ©cies frugĂvoras. Dentre as capturas foram obtidas 41 amostras fecais, onde se verificou a presença de polpa, vestĂgios de artrĂłpodes e sementes. O recurso mais utilizado por quirĂłpteros foram plantas pioneiras, constatado atravĂ©s do predomĂnio de sementes da espĂ©cie Cecropia pachystachya, consumida em maior intensidade por Artibeus lituratus. Os resultados ressaltam a importĂąncia destes animais no ambiente, em especial no processo de regeneração dessas ĂĄreas atravĂ©s da dispersĂŁo de sementes
The relationships among Leishmania infantum and phyllostomid bats assessed by histopathological and molecular assays
Bats have been reported as reservoir host of Leishmania spp. worldwide, mostly by molecular detection. However, it is still unclear whether bats act as reservoirs of Leishmania infantum to sandflies vectors. In this sense, the investigation of amastigotes forms in the target organs, and the characterization of their associated inflammation, may help to clarify the epidemiological importance of bats in endemic areas for leishmaniasis. The aim of this work was to investigate the host-parasite relationships under microscopic evaluation and predict the epidemiological role of two phyllostomid bats species naturally infected by L. infantum in an endemic area for human leishmaniasis. Fragments of skin, liver and spleen of L. infantum positive and negative bats (Artibeus planirostris and Carollia perspicillata) by qPCR, were studied by histological and immunohistochemical techniques. Both groups, positive and negative, did not show differences in the histopathological study, presenting only discrete tissue changes. Liver and skin showed mild inflammatory reactions. Findings on spleen consisted of reactivity of the lymphoid follicles, expressive presence of apoptotic cells and macrophages containing abundant phagocytic cells debris. We did not find amastigote forms in tissues by histological and IHC techniques in positive qPCR bats. Our results allow us to hypothesize that phyllostomid bats seem to have an important role in reducing the risk of transmission, possibly acting as dead-end host
Long-term surveillance of SARS-CoV-2 in the school community from Campo Grande, Brazil
Abstract Background The COVID-19 pandemic has significantly impacted education systems worldwide, with Brazil being one of the countries with the longest school closures. Over a million children and teenagers have been affected, leading to increased hunger and nutritional deficiencies. This study aimed to implement long-term surveillance of SARS-CoV-2 infections in public and private schools in Campo Grande, Brazil, after returning to in-person classes. Methods The study involved testing and genomic surveillance at 23 public and private schools in Campo Grande, Mato Grosso do Sul, Brazil, from October 18, 2021 to November 21, 2022. The participants eligible for enrollment were students aged 6â17 years and staff members from school institutions. At the time of collection, participants were asked if they had symptoms in the last two weeks. Whole-genome sequencing of SARS-CoV-2 was conducted to identify circulating variants and to compare them with those detected in the municipality. The demographic data and clinical history of the participants were described, and a logistic regression model was used to understand how the RT-qPCR results could be related to different characteristics. Results The study included 999 participants, most of whom were women. A total of 85 tests were positive, with an overall positivity rate of 3.2%. The dynamics of case frequency were consistent with those observed in the municipality during the study period. The most common symptoms reported were cough, rhinorrhea, headache, and sore throat. Symptoms were significantly associated with SARS-CoV-2 infection. Eleven lineages were identified in school community samples, with a frequency of occurrence per period similar to that found in the sequences available for the municipality. The most prevalent lineages within the sampling period were BA.2 (59.3%) and BA.5 (29.6%). Conclusions Our findings demonstrate that schools can play a crucial role in epidemiological surveillance, helping trigger rapid responses to pathogens such as SARS-CoV-2. Long-term surveillance can be used to track outbreaks and assess the role of children and adults in transmission. It can also contribute to pandemic preparedness, enabling a rapid response to emergencies, such as COVID-19