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As infeccoes do trato urinario (ITU) geralmente sao causadas por bacterias constituintes da microflora intestinal ou porcao distal do trato urinario inferior. Bacterias podem ser de dificil visualizacao na sedimentoscopia, desta forma caso nao forem encontradas na analise de sedimento nao indica ausencia de infeccao. Casos de ITU ocultas, ou seja, ausencia de bacterias e leucocitos no sedimento urinario, podem acontecer em algumas doencas sistemicas, como a diabetes mellitus e hiperadrenocorticismo. Portanto a urocultura e o procedimento mais confiavel para o diagnostico de ITU. O presente estudo teve como objetivos determinar os agentes causadores de infeccoes urinarias em caes e caracterizar a resistencia aos antimicrobianos. Foram coletadas 53 amostras de urina por cistocentese de caes clinicamente suspeitos de estarem com ITU. Os micro-organismos foram isolados e identificados atraves de testes bioquimicos, bem como foram submetidos a testes de sensibilidade frente a antimicrobianos. Das 53 amostras coletadas  33 (62%) foram positivas na urocultura. Os principais micro-organismos isolados foram Pseudomonas sp. (8/24.2%), Staphylococcus aureus (6/18.1%), Enterobacter sp. (4/12.1%), Escherichia coli (4/12.1%), Micrococcus sp (4/12.1%), Shigella sp (3/9.1%), Staphylococcus coagulase negativo (2/6.1%), Klebsiella sp (1/3.1%) e Salmonella sp (1/3.1%).  Dentre os antibioticos os quais os micro-organismos se mostraram mais resistente destacam-se Penicilina(80%), Clindamicina(76,4%) e Ampicilina(64,2%), bem como se mostraram altamente sensiveis aos antibioticos imipenem(100%), gentamicina(96,4%), ciprofloxacina(94,2%) e tobramicina(93,3%). Dentre os micro-organismos isolados neste trabalho destaca-se a Pseudomonas sp ., micro-organismo extensivamente relatados na literatura cientifica como causador de infeccoes urinarias complicadas. Destaca-se a presenca de um isolado de Salmonella sp., ja relatado como um micro-organismo  menos frequente causador de ITU, alem disso os animais de companhia podem ser um reservatorio de linhagens de bacterias multiresistente, onde especies potencialmente zoonoticas poderiam representar um grande risco a saude publica. SUMMARY The urinary tract infections (UTI) are usually caused by bacteria constituents of the intestinal microflora or the distal portion of the lower urinary tract. Bacteria are difficult to be visualized through sedimentoscopy; however, their absence in the sediment analysis does not indicate the absence of infection, as well. Hidden UTI cases, that is, the absence of bacteria and leukocytes in urine sediment may occur when systemic diseases such as diabetes mellitus and hyperadrenocorticism are present. Therefore, urine culture is the most reliable procedure for UTI diagnosis. The present study aimed to determine the causative agents of urinary tract infections in dogs and characterize antimicrobial resistance. We collected 53 urine samples by cystocentesis of dogs clinically suspected of having UTI. The micro-organisms were isolated and identified by biochemical tests and were tested for sensitivity to antibiotics. Of the 53 urine samples collected, 33 (62%) were positive. The main micro-organisms isolated were Pseudomonas sp. (8/24.2%), Staphylococcus aureus (6/18.1%), Enterobacter sp. (4/12.1%), Escherichia coli (4/12.1%), Micrococcus sp (4/12.1%), Shigella sp (3/9.1%), Staphylococcus coagulase negative (2/6.1%), Klebsiella sp (1/3.1%) and Salmonella sp (1/3.1%). We distinguish penicillin (80%), clindamycin (76.4%) and ampicillin (64.2%) among the antibiotics to which the microorganisms were more resistant while high susceptibility was observed to the antibiotics imipenem (100%), gentamicin (96.4%), ciprofloxacin (94.2%), and tobramycin (93.3%). Pseudomonas sp stands out among the microorganisms isolated in this study since it has been extensively reported in the scientific literature as the agent of complicated urinary tract infections. Noteworthy was the presence of an isolate of Salmonella sp, previously reported as less frequent causative agent of UTI. Furthermore, pet animals may be carriers of multidrug resistant strains of bacteria, of which potentially zoonotic species could represent a major public health risk.

ars veterinária

INFECÇÕES DO TRATO URINÁRIO EM CÃES NO MUNICÍPIO DE JATAÍ-GO: AGENTES E SENSIBILIDADE A ANTIMICROBIANOS / DOGS URINARY TRACT INFECTIONS IN JATAÍ, GO: AGENTS AND ANTIMICROBIAL SUSCEPTIBILITY