Table 3.
Clinical signs of experimental piglets administrated with each vaccine strain (174-1V-80, PRG942V-80, and K71V-80) or filtered supernatant of a mixture of homogenized small intestine and fecal contents sampled from each passage
Vaccine strain | Route of administration | No. of animals in each passage | Clinical signs (No. of diarrheic animals/No. of animals used) |
||||
---|---|---|---|---|---|---|---|
1st passage | 2nd passage | 3rd passage | 4th passage | 5th passage | |||
174-1V-80 | Oral route | 2 | 0/2 | 0/2 | 0/2 | 0/2 | 0/2 |
PRG942V-80 | Oral route | 2 | 0/2 | 0/2 | 0/2 | 0/2 | 0/2 |
K71V-80 | Oral route | 2 | 0/2 | 0/2 | 0/2 | 0/2 | 0/2 |