R. Achi et L. Mata, OOCYST SIZE OF CRYPTOSPORIDIUM SP (APICOM PLEXA, CRYPTOSPORIDILDAE) SUGGEST THE PRESENCE OF CRYPTOSPORIDIUM-PARVUM IN COSTA-RICAN CHILDREN, Revista de biologia tropical, 45(1B), 1997, pp. 615-618
From 1982 to 1987 infant and preschool Costa Rican children with acute
diarrhea were studied. Cryptosporidium (Tyzzer 1912) and other agents
of diarrhea were investigated. Cryptosporidium oocysts were diagnosed
in Giemsa and acid-fast (Kinyoun) stained smears. Ten Cryptosporidium
oocysts per positive smear were systematically measured. Giemsa stain
ed oocysts showed less variation respect to the mean. The oocysts corr
esponded to C. parvum with diameters of 5.0 x 4.5 mu m but not to C. m
uris with oocysts of 7.4 to 5.6 mu m.