Cardiac thrombosis normally occurs in old Syrian hamsters and according to the research it has a higher incidence rate in females than males. The most frequent site of thrombus formation has been reported to be the left atrium and it usually occurs secondary to degenerative cardiomyopathy and amyloidosis. In this study during a period of 2 years, 22 pet Syrian hamsters aged between 1-3 years-old with signs of cardiovascular disease and referred to the small animal Veterinary Teaching Hospital of University of Tehran were examined in order to evaluate for cardiac diseases as well as atrial thrombosis. During the examinations and observations clinical signs such as lethargy, anorexia, hyperpnoea, reduced daily activity, tachycardia, cyanosis, and vaginal discharge were observed. Based on the clinical sings, the initial diagnosis of cardiac disease was made and for more accurate evaluation of cardiac disease, the cases were referred to the radiology department. For detection of specific signs of cardiac disease echocardiography was performed on all patients. in some cases, sampling of vaginal discharge was taken as well and transferred to the lab for bacterial culture. Cardiac thrombosis and especially atrial thrombosis in all cases were diagnosed by echocardiography so that 9 cases showed pyometra concurrently.

The experiment was applied on /45/ healthy male of golden Syrian hamsters, were divided into three groups as follows: Control group(C), High Fat-High Cholesterol group(HF-HC) and Borage Oil group (BO). All groups had laboratorial diet freely during/15/ days(first period), after that each of HF-HC and BO groups took diet consisting of 80% laboratorial diet+ 20% fats(13.5% sheep fat+6.5% coconut oil) for /4/ weeks(second period). The treatment of BO group changed after second period and hamsters had laboratorial diet and dosed borage oil 2g/kg of the body weight daily for /4/ weeks(third period). The results showed a significant increase(p=0.0000) of the total cholesterol(TC), low density lipoprotein cholesterol (LDL-C) and triglycerides(TG) concentrations approximately(163%, 224%, 232%) respectively in each of HF-HC and BO groups in the second period in comparison with first period. Our results showed, in third period, a dramatic significant decrease(P=0.0000) in the TC, LDL-C and TG concentrations approximately (56%, 69%, 40%) respectively in BO group in comparison with the same group of second period

O estabelecimento e a evolução da leptospirose em hamster (Mesocricetus auratus) pela infecção experimental com Leptospira interrogans sorovar Canicola, estirpe LO4, pela exposição cutânea íntegra e escarificada, tendo como controle a via intraperitoneal foram avaliados. Foram utilizados 120 hamsters, fêmeas, distribuídas em dois grupos de acordo com a via de inoculação (pele escarificada e pele íntegra). O inóculo infeccioso foi constituído por uma cultura pura de L. interrogans sorovar Canicola (estirpe LO4), isolada do fígado de um suíno de abatedouro em Londrina, Estado do Paraná e tipificada pela técnica de adsorção de aglutininas com o kit de anticorpos monoclonais no Royal Tropical Institute, Amsterdã, Holanda. Os animais foram observados duas vezes ao dia, durante 21 dias. Os animais que vieram a óbito foram necropsiados e colhidos assepticamente rins, fígado, sistema genital (útero e ovário) e cérebro. Os animais sobreviventes foram eutanasiados após 21 dias. Foram ainda colhidas amostras de soro sanguíneo por punção cardíaca para a pesquisa de aglutininas antileptospiras nos animais sobreviventes, pela técnica de soroaglutinação microscópica (SAM). Para a detecção de leptospiras, foram utilizados microscopia direta a fresco e cultivo microbiológico. A via cutânea escarificada induziu maior letalidade quando comparada com a pele integra, com estabelecimento e evolução da leptospirose. Por outro lado, a via cutânea íntegra induziu mais frequentemente o estado de portador renal e/ou genital para leptospirose. A estirpe LO4 apresentou baixo poder imunogênico, induzindo soroconversão na SAM em apenas um animal.