数十年来在巴西东北部鼠疫就是一种地方病。从1975年向 WHO 报告的496例高峰以来,在最近十年间每年均有人间病例发生。然而,由于在病人接受抗菌素治疗前未能按常规获得细菌学标本和未能利用血清学试验作追溯性诊断,故对鼠疫的发病率不能做精确的确定。Mello 和 Paracampos 二氏于 Plague in northeastern Brazil has been endemic for decades. Since the 496 peaks reported to the WHO in 1975, human cases have occurred every year in the recent decade. However, the incidence of plague can not be precisely determined because bacteriological specimens are not routinely obtained prior to receiving antibiotic therapy and retrospective diagnosis by serological tests is not available. Mello and Paracampos