Some Haematological and Biochemical Investigations on Duck Virus Hepatitis following Administration of Glycyrrhizin

Table 1

Morbidity, mortality, and protection rates in different experimental groups of ducklings after challenge at the 25th day of age.

Groups	Morbidity rate	Mortality rate/days after infection														Mortality rate	Protection rate
		1	2	3	4	5	6	7	8	9	10	11	12	13	14
Control	80%	—	—	2	3	1	1	—	—	—	—	—	—	—	—	70%	30%
Glycyrrhizin	10%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0%	100%
Vaccinated	10%	—	—	1	—	—	—	—	—	—	—	—	—	—	—	10%	90%
Glycyrrhizin and vaccinated	0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0%	100%