马链球菌亚种兽疫(S.动物流行病)是一种主要感染马的人畜共患病原体,猪,还有狗.虽然罕见,它还被证明会感染食用未经巴氏消毒的乳制品或直接接触马的人。这里,我们介绍了一例没有明确传播方式的患者的人畜疫病菌血症。一名86岁男性,有冠状动脉疾病病史,射血分数降低的心力衰竭,完全心脏传导阻滞状态,起搏器后,高血压,高脂血症,和2型糖尿病因发烧和发冷而提交急诊科。他发烧和僵硬三天,但否认减肥,咳嗽,喉咙痛,或皮疹。在急诊室,生命体征显示发烧101.2华氏度,心率110,其他生命体征稳定。除了心动过速,体检没有什么异常,实验室工作显示没有白细胞增多,但炎症标志物升高和乳酸升高。胸部计算机断层扫描,腹部,骨盆没有发现任何感染源。血液培养物增加了动物疫病,并咨询了传染病小组,病人开始服用青霉素G。由于担心起搏器导线感染性心内膜炎,进行了经胸和经食道超声心动图检查,没有显示瓣膜植被。重复血培养显示感染已清除,患者最终使用阿莫西林出院。虽然我们的患者否认食用未经巴氏消毒的乳制品或与马直接接触,经过进一步的询问,他确实支持偶尔与马互动的家庭成员。这种情况是有价值的,因为它增加了关于特别是在人类中的兽疫杆菌感染的稀疏文献。当明确的感染源不容易识别时,广泛的历史记录至关重要。还需要进一步的研究来更好地了解这种细菌的各种传播方式,以更好地瞄准和警告那些感染风险增加的人。
Streptococcus equi subspecies zooepidemicus (S. zooepidemicus) is a zoonotic pathogen that primarily infects horses, pigs, and dogs. Although rare, it has also been shown to infect humans who consume unpasteurized dairy food or have direct contact with horses. Here, we present a case of S. zooepidemicus bacteremia in a patient without a clear mode of transmission. An 86-year-old male with a past medical history of coronary artery disease, heart failure with reduced ejection fraction, complete heart block status post pacemaker, hypertension, hyperlipidemia, and type 2 diabetes mellitus presented to the Emergency Department with fever and chills. He had fevers and rigors for three days but denied weight loss, cough, sore throat, or rashes. In the Emergency Department, vital signs revealed a fever of 101.2 degrees Fahrenheit and a heart rate of 110 with other stable vital signs. The physical exam was unremarkable except for tachycardia, and laboratory work revealed no leukocytosis but elevated inflammatory markers and elevated lactate. Computed tomography of the chest, abdomen, and pelvis did not reveal any source of infection. Blood cultures grew S. zooepidemicus and the Infectious Diseases team was consulted, who started the patient on Penicillin G. Due to concern for pacer-lead infective endocarditis, transthoracic and transesophageal echocardiograms were performed, which did not show valvular vegetations. Repeat blood cultures showed clearance of the infection, and the patient was ultimately discharged on amoxicillin. While our patient denied consuming unpasteurized dairy products or having direct contact with horses, upon further questioning, he did endorse family members who occasionally interacted with horses. This case is valuable as it adds to the sparse literature on S. zooepidemicus infections specifically in humans. Extensive history taking is of utmost importance when a clear source of infection is not easily identifiable. Further research is also needed to better understand the various modes of transmission of this bacterium to better target and caution those at an increased risk of infection.