Short report: Possible Cryptosporidium muris infection in humans

Oocysts of cryptosporidia whose morphology resembled that of Cryptosporidiu m muris were found in the stool of 2 healthy girls in Surabaya, Indonesia. The oocysts were predominantly oval and measured 7.75 +/- 0.17 x 5.55 +/- 0 .13 mu m (mean +/- SD). The number of oocysts excreted were more than 10(5) per gram of stool. The oocysts were well stained with fluorescein-conjugat ed monoclonal antibody to Cryptosporidium. The specimens from both girls co ntaining the oocysts showed a positive result by the polymerase chain react ion (PCR) using primers specific for the genus Cryptosporidium, but a negat ive result by the PCR using primers specific for C. parvum. The 2 girls pas sed oocysts for 5 and 6 days, respectively. They did not complain of any sy mptoms during the passage of oocysts.