TABLE 3.

Summary of RT-PCR amplifications for the 173-bp fragment of the small dsRNA element of Cryptosporidium

Organism	Source	Case	No. of samples		% Ampli- fication
			Amplified by RT-PCR	Not amplified by RT-PCR
C. parvum
Genotype 1	Humans	Outbreaka	93	39	70
Genotype 2	Humans	Outbreaka	64	10	86
Genotype 1	Humans	Sporadic	30	30	50
Genotype 2	Humans	Sporadic	95	27	78
Genotype 2	Livestock animals	Sporadic	21	34	38
C. felis	Humans	Sporadic	4	0	100
C. meleagridis	Humans	Sporadic	1	2	33

^aWaterborne and intrafamilial outbreaks.