Originally identified in monkeys, the number of cases has been grossly underestimated due to its misdiagnosis as the benign P.malariae ( see Fatal malaria strain'mistaken for more benign form '). 它最初是在猴体内发现的,由于它被误诊为良性的三日疟原虫,这类病例的数量被大量低估了(参见致命疟疾类型“被误诊为良性类型”)。