TABLE 3.

Cross-reactivities of type I and type II HLTs to anti-HLT antisera

Enterotoxin	Cross-reactivity witha:
	Rabbit antiserum				Mouse antiserum
	Anti-CT	Anti-LT-IIa	Anti-LT-IIb	Anti-LT-IIc	Anti-CT	Anti-LT-IIa	Anti-LT-IIb	Anti-LT-IIc
CT	+++	−	+	+	+++	−	−	NA
LT-IIa	+	+++	+	+	+	+++	+	NA
LT-IIb	+	+	+++	+	+	−	+++	NA
LT-IIc	+	+	+	+++	+	−	+	NA

^aAntisera were diluted to 1:5,000 for use in ELISA. −, no reactivity; +, low reactivity (OD₄₀₅ of <0.25); ++, moderate reactivity (OD₄₀₅ of 0.25 to 0.75); +++, high reactivity (OD₄₀₅ of >0.75); NA, not applicable.