Studies on biochemical constituents and hydration of horses in training or competitions are essential for the knowledge of their adaptive physiological and metabolic responses to the type of exercise inherent to the sport. The present research evaluated the effects of exercise on hydric status and physiologic and biochemical profiles in Quarter Horses during a barrel race training session. The design consisted of three evaluation times (T): at rest, before the start of physical activity (T0); immediately after a 10-minute warm-up trot and then running the barrel race courses twice with a 10-minute interval (T1); and after one hour’s rest after the second course (T2). The parameters analyzed were: heart rate (HR), respiratory rate (RR), body temperature (BT) and mucose color; the capillary refill time (CRT), packed cell volume (PCV), total plasma proteins (TPP), serum creatinine (CRE) and blood urea nitrogen (BUN) were evaluated and used to infer water status; plasma osmolarity (Osm) was measured; the electrolytes sodium (Na), potassium (K), chloride (Cl), total calcium (tCa), total magnesium (tMg) and phosphorus (P), plasma glucose (Glu) and lactate (Lac) and the muscle enzymes creattine kinase (CK) and aspartate aminotransferase (AST) completed the evaluated parameters. The data for the variables studied were submitted to ANOVA and the Tukey test at 5% probability. After exercise (in T1), HR, RR, BT, PCV, TPP, Glu, Lac, Cre increased (P<0.05), there was also increase in phosphorus and decrease in K (P<0.05), but there was no hypophosphatemia and hipokalemia, respectively. After rest (in T2), only glucose returned to baseline levels (T0) and, with lower mean values, HR, RR, BT, PCV, K and Lac did not return to baseline levels (T0), while P decreased (P<0.05). Osm, BUN, Na, Cl, tCa, tMg, CK and AST did not change between times (P>0.05). It was concluded that the maximum intensity exercise performed on two barrel race courses caused mild hemoconcentration, did not changed plasma osmolality or concentrations of important electrolytes and muscle enzymes of horses, but caused hyperlactatemia without the plasma lactate concentrations being fully recomposed after resting.

RESUMO.A doença de Lyme é uma zoonose pouco relatada no Brasil e o cão comportase como reservatório no ambiente domiciliar, o que favorece a transmissão do patógeno para o homem e outros animais. Assim, o objetivo deste trabalho foi relatar a presença de anticorpos anti-Borrelia burgdorferi em um cão atendido em uma clínica de São Luís -MA. A doença de Lyme ou borreliose de Lyme é uma enfermidade infecciosa de distribuição mundial, determinada por espiroquetas do gênero Borrelia, que acomete diferentes espécies de animais domésticos, silvestres e também o homem. Foi atendido em uma clínica particular, um cão da raça Rottweiler, macho, 1 ano de idade com a queixa de apatia, secreção ocular bilateral e presença de ectoparasitas. Ao exame físico foi observado que o animal estava magro, mucosas conjuntival e oral hipocoradas, linfonodos submandibular, pré-escapulares e poplíteos normais à palpação e sem alterações à auscultação pulmonar e cardíaca. O presente caso permitiu concluir que as alterações clínicas e hematológicas podem ser inespecíficas, no entanto em regiões onde a incidência de carrapatos é de grande relevância e por ser uma zoonose, torna-se importante a investigação de borreliose em animais que apresentem histórico de carrapato. O diagnóstico preciso de borreliose canina deve ser feito a fim de instituir a terapêutica adequada para o caso. É de suma importância o controle dos vetores, pois são eles os responsáveis pela transmissão da borreliose. Sendo assim, é necessário que haja orientação do Médico Veterinário para os proprietários de animais infectados minimizando os riscos à saúde humana e animal. Palavras chave: Borreliose, carrapatos, zoonoseLyme disease in Rottweiler dog: Case report ABSTRACT. Lyme disease is a zoonosis that is rarely reported in Brazil and the dog behaves as a reservoir in the home environment, which favors the transmission of the pathogen to humans and other animals. Thus, the objective of this study was to report the presence of anti-Borrelia burgdorferi antibodies in a dog attended at a clinic in São Luís -MA. Lyme disease or Lyme borreliosis is an infectious disease of worldwide distribution, determined by spirochetes of the genus Borrelia, which affects different species of domestic animals, wild and also man. It was attended in a private clinic, a dog of the breed Rottweiler, male, 01 year old with the complaint of apathy, bilateral ocular secretion and

Babesiosis is an emerging, worldwide disease caused by protozoa of the genus Babesia, which infects domestic animals and wildlife, as well as humans. The objective of this study was to determine the occurrence of Babesia canis vogeli in dogs in the city of São Luís - MA, Brazil. Blood samples were collected from 65 animals for direct examination, through blood smear and molecular diagnosis, through PCRun. Among the 65 animals analyzed by direct diagnosis, none were positive for Babesia spp. while PCRun showed that 5 (7.69%) were infected by B. canis vogeli, demonstrating the presence of this species in dogs from an urban environment in the city of São Luís. It was concluded that PCR is a more sensitive and specific for this diagnosis, and can be used to define more precisely the infection of dogs by B. canis vogeli. This study confirmed the presence of B. C. vogeli in dogs in the city of.

In horses, acid-base balance disorders are common after intense exercise, with metabolic acidosis being the most common after high intensity and short duration exercise. Understanding the processes that cause them is fundamental for procedures, which aimed to improve the physical fitness of horses for athletic purposes, with fewer changes in homeostasis. The present study assessed the effect of barrel racing on acid base balance in Quarter Horse, at the following times: T0 - immediately before training; T1 - immediately after the end of the second course; T2 - one hour after the end of the second course. In T1, there was decrease (P<0.05) in the pH, HCO3 -, pCO2, cBase, tCO2 and strong ion difference concentrations, while the plasma lactate and anion gap increased (P<0.05). It was concluded that barrel racing training caused transient metabolic acidosis in the horses, and hyperlactatemia was still present after an hour of rest.