Table 2.

Experimental infections of Wistar rats with experimentally obtained metacercariae of pig isolate from the Northern Bolivian Altiplano human hyperendemic area and comparison with sheep and cattle isolates from the same area.

Host isolate	Pig		Sheepc		Cattlec
F. hepatica geographical origin	Batallas	Batallas	Batallas	Ancocagua	Kallutaca	Batallas
Age of metacercariae	6–8 weeks	9–11 weeks	1 week	2 weeks	6 weeks	8 weeks
No. metacercariae inoculated per rat	20	20	20	20	20	20
No. inoculated rats	10	14	14	23	4	4
No. rats infected (%)	8 (80.0%)	3 (21.4%)	11 (78.6%)	18 (78.3%)	4 (100%)	2 (50.0%)
No. flukes recovered per rat (mean)	1–3 (1.6)	1–1 (1.0)	1–8 (3.6)	1–10 (3.7)	1–2 (1.7)	1–2 (1.5)
Intensitya	8.0%	5.0%	14.3%	14.6%	8.8%	3.7%
Mean % flukes recovered/ratb	8.0%	7.0%	18.2%	18.6%	8.8%	7.5%

^aIntensity = total % of flukes recovered = (total No. of flukes recovered/total No. of metacercariae administered in all rats) x 100.

^bMean % flukes recovered/rat = Mean % of flukes recovered per infected rat = (flukes recovered/metacercariae administered per infected rat) x 100.

^cData from Mas-Coma et al. [36].