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The influence of chromium supplementation on some blood variables in 11 adult stallions used for policing activities was evaluated. Each animal was treated with 11mg of chromium/400kg body weight, orally, for a period of 30 days. On days 0 (before) and 30 (after) the animals were evaluated and blood samples were obtained before and after exercise. Plasma glucose and lactate and serum cortisol and insulin were analyzed in each of these moments. On day 0, plasma glucose concentrations were 68.45.6mg/dL and 78.76.5mg/dL; plasma lactate concentrations were 6.20.6mg/dL and 13.17.6mg/dL; serum cortisol values were 48.57.9ng/mL and 42.619.7ng/mL; and serum insulin values were 3.06.4UI/mL and 1.91.7UI/mL, respectively, before and after exercise. On day 30, plasma glucose concentrations were 73.35.7mg/dL and 78.46.7mg/dL; plasma lactate concentrations were 7.30.9mg/dL and 7.61.2mg/dL; serum cortisol values were 62.921.8ng/mL and 40.317.0ng/mL; and serum insulin values were 1.41.3UI/mL and 1.71.4UI/mL, respectively, before and after exercise. As an effect of the exercise, a decrease was shown in the concentration of serum insulin and an increase in plasma lactate and glucose. Chromium supplementation resulted in a reduction of lactate values after physical activity, possibly indicating that chromium contributed to a better utilization of plasma glucose and to a better adaptation of animals to physical activity.Keywords: equine, biochemistry, chromium, exercise 68,45,6mg/dL e 78,76,5mg/dL; de lactato plasmático, 6,20,6mg/dL e 13,17,6mg/dL; de cortisol sérico, 48,57,9ng/mL e 42,619,7ng/mL; e de insulina sérica, 3,06,4UI/mL e 1,91,7UI/mL, respectivamente, antes e após o exercício. No dia 30, as concentrações de glicose plasmática foram 73,35,7mg/dL e 78,46,7mg/dL; de lactato plasmático, 7,30,9mg/dL e 7,61,2mg/dL; de cortisol sérico, 62,921,8ng/mL RESUMO O presente trabalho avaliou a influência da suplementação com cromo em algumas variáveis sanguíneas em 11 equinos machos, adultos, usados em atividade de policiamento. Cada animal recebeu 11mg de cromo/400kg de peso corpóreo, via oral, durante 30 dias. Nos dias 0 (antes) e 30 (após), os animais foram avaliados e amostras de sangue foram obtidas antes e após o exercício. Glicose e lactato plasmáticos e cortisol e insulina séricas foram determinados. No dia 0, as concentrações de glicose plasmática foram

The black-eared opossum (Didelphis aurita) is a South American synanthropic marsupial. The presence of opossums in domestic spaces is relevant in the One-Health context since they are hosts of pathogens and ectoparasites that may affect the health of domestic animals and humans. In this study, we aim to determine the occurrence of hemoplasmas and selected tick-borne pathogens in free-ranging black-eared opossums, along with their molecular characterization, hematological and biochemical evaluation and factors associated with infection, in the municipality of Viçosa, State of Minas Gerais, southeastern Brazil. Thirty black-eared opossums were trapped between March 2021 and June 2022. Ectoparasites were collected. Hematological and biochemical analyses were performed. DNA from EDTA-blood samples were analyzed by PCR and qPCR assays. By molecular analyses, ‘Candidatus Mycoplasma haemoalbiventris’ was the most prevalent hemoparasite (73.3%), followed by Hepatozoon sp. (22.2%). Significant differences were observed in the number of platelets, and in the concentration of protein and globulins in the animals infected by ‘Ca. M. haemoalbiventris’ when compared with the negative group. This is the first report of ‘Ca. M. haemoalbiventris’ infection in D. aurita.

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The aim of this study was to evaluate the serum amyloid A (SAA) and biomarkers of muscle activity of horses submitted to show jumping activity. To do this, the variables SAA, glucose, lactate and the biomarkers creatine kinase (CK) and aspartate amino transferase (AST) were evaluated in 10 horses submitted to the show jumping exercise in a tournament for beginners. The evaluations occurred before exercise (T0), immediately after (T1), 30 minutes (T2), 60 minutes (T3) and 24 hours after the end (T4). Data were evaluated using analysis of variance for repeated measures. The statistical software SAEG 9.1 was used to verify the level of significance between the moments for P<0.05. Glucose presented a difference between the moments T0 (97.7±13.3mg/dL) and T1 (79.7±14.1mg/dL). Lactate presented elevation in T1 (15.3±6.1mmol/L) compared to the others T0 (3.8±0.8mmol/L), T2 (6.5±3.9mmol/L), T3 (5.3±2.2mmol/L) and T4 (5.1±1.6mmol/L). The CK showed a significant difference between T0 (82.8±51.2U/L) and T1 (140.1±58.5U/L) and between T4 (74.4±43.1U/L) with T1 (140.1±58.5U/L). The AST presented no difference between moments. The show jumping activity with one-meter obstacles did not induce changes in the SAA protein between the moments.