Table 1.

Comparison of Cryptosporidium detection between microscopy and qPCR

	DFA (+)	DFA (−)
qPCR (+)	78	29
qPCR Ct (median)	28 (IQR = 26.1–30.7)	32 (IQR = 28.4–32.5)
qPCR parasite count (median)	2.4 × 106 (IQR = 6.9 × 105–1.1 × 107)	1.7 × 105 (IQR = 1.1 × 105–2.4 × 106)
DFA oocyst count (median)	3.7 × 105 (IQR = 9.3 × 104–8.4 × 105)	n/a
qPCR (−)	2	15
qPCR Ct (median)	n/a	n/a
qPCR parasite count (median)	n/a	n/a
DFA oocyst count (range)	1 × 104 – 4 × 104	n/a

DFA = direct fluorescent antibody; qPCR = real-time polymerase chain reaction; IQR = interquartile range.