The aim of this study was to isolate Toxoplasma gondii and determine the viability of the parasite in fresh semen samples of clinically healthy adult dogs naturally infected. Eleven seropositive dogs with T. gondii IgG antibodies from southern Brazil were selected to confirm the presence and viability of T. gondii in fresh semen samples using in vitro isolation in Vero cell culture, polymerase chain reaction (PCR) and sequencing analysis. The presence of viable T. gondii was confirmed by in vitro isolation and PCR in five semen samples. The ITS1 region of the isolated protozoa (TG S4) was amplified and sequenced. The nucleotide sequence obtained was 99% compatible with the T. gondii DNA sequences stored in the GenBank. It has been shown that T. gondii tachyzoites may be isolated in vitro from fresh semen samples of clinically healthy dogs seropositive for T. gondii.
This study aimed to evaluate the occurrence of anti-Neospora caninum and anti-Toxoplasma gondii antibodies in horses from Pantanal, in Mato Grosso state. Two hundred blood samples were collected from horses in Pantanal of Mato Grosso, Brazil. The samples were analyzed by IFAT for the detection of anti-Neospora caninum and anti-Toxoplasma gondii antibodies. Antibodies to N. caninum were found in 30 (15%) of 200 horses in titers of 50 (25 horses), 100 (two horses), 200 (two horses), and 400 (one horse). Antibodies to T. gondii were found in five (2.5%) of 200 horses in titers of 50 (three horses), 200 (one horse), and 400 (one horse). One animal showed antibody titers for both coccidian (titers of 200 for N. caninum e 400 for T. gondii). The pantaneiros horses were exposed to Neospora spp. and T. gondii. Key words: Horse, pantanal, toxoplasmosis, neosporosis, immunofluorescence ResumoEste estudo teve como objetivo avaliar a ocorrência de anticorpos anti-Neospora caninum. e antiToxoplasma gondii em cavalos do Pantanal, no estado de Mato Grosso. Duzentas amostras de sangue foram coletadas de equinos do Pantanal Mato-grossense, Brasil. As amostras foram analisadas pela reação de Imunofluorescência Indireta (RIFI) para pesquisa de anticorpos anti-Neospora caninum e anti-Toxoplasma gondii. Os anticorpos anti N. caninum foram detectados em 30 (15%) dos 200 cavalos, nos títulos de 50 (25 cavalos), 100 (dois cavalos), 200 (dois cavalos) e 400 (um cavalo). Os anticorpos anti T. gondii foram detectados em cinco (2,5%) dos 200 cavalos, nos títulos de 50 (três cavalos), 200 (um cavalo) e 400 (um cavalo). Em um cavalo verificou-se presença de anticorpos para ambos coccídeos (título de 200 para N. caninum e 400 para T. gondii). Os equinos pantaneiros foram expostos ao N. caninum e T. gondii.
ResumoA hemoglobina glicada e frutosamina são pouco utilizadas em cães para o diagnóstico do Diabetes mellitus devido à escassez e divergência de valores de referência. Com o objetivo de determinar os valores de referência e metodologia da hemoglobina glicada e frutosamina em cães, foram utilizados 100 cães sadios, machos e fêmeas, de dois a oito anos. As metodologias empregadas foram resina de troca iônica e método cinético por redução do azul de nitrotetrazólio, respectivamente. Os valores médios de hemoglobina glicada encontrados foram de 5,3-7,01% e de frutosamina de 277,52-387,3 μmolL -1 , estabelecidos segundo metodologias da Sociedade Brasileira de Diabetes, e podem ser adotados para cães, machos e fêmeas. Palavras-chave: Cães, frutosamina, hemoglobina glicada, glicose AbstractGlycated haemoglobin and fructosamin levels are not commonly used to diagnosis Diabetes mellitus in dogs due to a lack of reference values. To estabilish the reference values and determination methods of glycated haemoglobin and frutosamine, both male and females, healthy dogs, 2-8 years old (n=100) were used. The methodologies used were the ionic resin and the kinetic method by the reduction of blue nitrotetrazolium, respectively. Medium values of glycated haemoglobin of 5.3-7.01% and 277.52-387. 30 for fructosamin established by Brazilian Diabetes Society methods can be adopted for dogs, both males and females.
ResumoO Diabetes mellitus (DM) ocorre com frequência em cães, sendo a glicemia o teste laboratorial de confirmação. O diagnóstico e monitoramento em pessoas são realizados pelas concentrações de hemoglobina glicada e frutosamina. O objetivo deste estudo foi diagnosticar a DM em 19 cães, com avaliação das concentrações da glicose sérica, hemoglobina glicada e frutosamina. Seis cães com DM e em tratamento com insulina foram acompanhados por um período de doze meses, com as mesmas avaliações hematológicas, até o óbito (três cães) ou controle glicêmico (três cães). Observouse aumento dos valores de glicose, hemoglobina glicada e frutosamina em todos os cães com DM, e valores de hemoglobina glicada e glicose superiores nos animais não sobreviventes, na última avaliação realizada. Estes resultados apontam para a importância da avaliação de hemoglobina glicada e frutosamina em cães com diabetes e para diagnóstico e controle da efetividade do tratamento. Palavras-Chave: diagnóstico laboratorial; glicemia; insulina; prognóstico. AbstractDiabetes mellitus (DM) commonly occurs in dogs, and the laboratorial confirmation is carried out by glycemia test. The diagnosis and monitoring in humans is made by glycated hemoglobin and fructosamine concentrations. The objective of this study was to diagnose DM in 19 dogs, by evaluating seric glucose, glycated hemoglobin and fructosamine concentrations. Six dogs with DM and treated with insulin were assisted during a twelve-month period, by means of the same blood analysis, until the death (three dogs) or glycemic control (three dogs). Glucose, glycated hemoglobin and fructosamine increased in all dogs with DM, and dogs that did not survive presented higher glycated hemoglobin and seric glucose values than those that survived at the last evaluation. The results showed the importance of evaluating glycated hemoglobin and fructosamine in dogs with DM to diagnose and control treatment effectiveness.
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