No Evidence of SARS-CoV-2 Infection in Neotropical Primates Sampled During COVID-19 Pandemic in Minas Gerais and Rio Grande do Sul, Brazil.

In 2019, a new coronavirus disease (COVID-19) was detected in China. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was capable to infect domestic and captive mammals like cats, tigers and minks. Due to genetic similarities, concern about the infection of non-human primates (NHPs) and the establishment of a sylvatic cycle has grown in the Americas. In this study, neotropical primates (NP) were sampled in different areas from Brazil to investigate whether they were infected by SARS-CoV-2. A total of 89 samples from 51 NP of four species were examined. No positive samples were detected via RT-qPCR, regardless of the NHP species, tissue or habitat tested. This work provides the first report on the lack of evidence of the circulation of SARS-CoV-2 in NP. The expansion of wild animals sampling is necessary to understand their role in the epidemiology of SARS-CoV-2 and other potentially zoonotic pathogens in natural environments shared by humans.

Comparative study of cotton, polyglactin and polyglecaprone sutures in intestinal anastomoses in dogs.

BACKGROUND: Over the years, many sutures were developed and then abandoned. Until now was not found an ideal suture to the intestinal tract or other tissues in general, making the choice a difficult task. AIM: To evaluate, macroscopically and microscopically, the healing process of intestinal anastomoses in dogs using polyglecaprone 25, polyglactin 910 and cotton sutures. METHODS: Twenty adult male dogs were operated on and underwent to three small bowel anastomosis using the technique with submucosal sutures. Were used three threads and the anastomoses were evaluated at different postoperative periods - group I - three days; group II - seven days; group III - 14 days and group IV - 21days. Macroscopic analysis was to assess the presence or absence of peritonitis, aspect of the anastomosis and adhesions. Histological studies of the anastomoses, using hematoxylin and eosin and Masson's trichrome analyzed the exudative inflammation, granulomatous inflammation, the mucosal epithelial coating and collagen fibers. RESULTS: The macroscopic analysis showed good coaptation of the edges with a moderate degree of adhesion between the intestines and omentum three to 21 days after surgery. The microscopic evaluation revealed exudative inflammation with neutrophils and fibrin, which ranged from mild to moderate until the 14th day; granulomatous inflammation with macrophages, multinucleated giant cells and epithelioid cells were more evident at 14th day for the cotton, presence of granulation tissue (fibroblasts) and collagen fibers, a moderate way, from the 7th for the three threads. CONCLUSION: All three threads showed similar behavior and thus they can be indicated for anastomoses of the small intestine.

Estudo comparativo entre os fios de algodão, poliglactina e poliglecaprone nas anastomoses intestinais de cães / Comparative study of cotton, polyglactin and polyglecaprone sutures in intestinal anastomoses in dogs

RACIONAL: Nos últimos anos muitos fios de sutura foram desenvolvidos e depois abandonados. Até hoje não foi encontrado um fio cirúrgico ideal aos intestinos ou a outros tecidos de um modo geral, tornando sua escolha tarefa difícil. OBJETIVO: Avaliar macro e microscopicamente a cicatrização de anastomoses do intestino delgado de cães, utilizando suturas com fios de poliglecaprone 25; poliglactina 910 e algodão. MÉTODOS: Vinte cães machos adultos foram operados e submetidos a três anastomoses no intestino delgado empregando a técnica extramucosa com pontos separados. Foram utilizados os três tipos fios e as anastomoses foram analisadas em diferentes períodos no pós-operatório: grupo I -três dias; grupo II - sete dias; grupo III - 14 dias; grupo IV - 21dias. A análise macroscópica consistiu em avaliar a presença ou não de peritonite, aspecto das anastomoses e aderências. Os estudos histológicos das anastomoses, empregando a hematoxilina e eosina e o tricrômico de Masson analisaram a inflamação exsudativa, inflamação granulomatosa, o revestimento epitelial da mucosa e as fibras colágenas. RESULTADOS: Na avaliação macroscópica os fios apresentaram boa coaptação das bordas com moderado grau de aderência entre alças e omento do 3º ao 21º dia do pós-operatório. A avaliação microscópica mostrou inflamação exsudativa com neutrófilos e fibrina que variou de discreta a moderada até o 14º dia; inflamação granulomatosa com presença de macrófagos, células gigantes multinucleadas e células epitelioides mais evidentes ao 14º dia para o fio algodão; presença de tecido de granulação (fibroblastos) e fibras colágenas, de forma moderada, a partir do 7º dia para os três fios. CONCLUSÃO: Os três tipos de fios de sutura apresentaram comportamento semelhante, com boa cicatrização e podem ser recomendados em anastomoses do intestino delgado.

BACKGROUND: Over the years, many sutures were developed and then abandoned. Until now was not found an ideal suture to the intestinal tract or other tissues in general, making the choice a difficult task. AIM: To evaluate, macroscopically and microscopically, the healing process of intestinal anastomoses in dogs using polyglecaprone 25, polyglactin 910 and cotton sutures. METHODS: Twenty adult male dogs were operated on and underwent to three small bowel anastomosis using the technique with submucosal sutures. Were used three threads and the anastomoses were evaluated at different postoperative periods - group I - three days; group II - seven days; group III - 14 days and group IV - 21days. Macroscopic analysis was to assess the presence or absence of peritonitis, aspect of the anastomosis and adhesions. Histological studies of the anastomoses, using hematoxylin and eosin and Masson's trichrome analyzed the exudative inflammation, granulomatous inflammation, the mucosal epithelial coating and collagen fibers. RESULTS: The macroscopic analysis showed good coaptation of the edges with a moderate degree of adhesion between the intestines and omentum three to 21 days after surgery. The microscopic evaluation revealed exudative inflammation with neutrophils and fibrin, which ranged from mild to moderate until the 14th day; granulomatous inflammation with macrophages, multinucleated giant cells and epithelioid cells were more evident at 14th day for the cotton, presence of granulation tissue (fibroblasts) and collagen fibers, a moderate way, from the 7th for the three threads. CONCLUSION: All three threads showed similar behavior and thus they can be indicated for anastomoses of the small intestine.