Pathogenicity of Haemophilus parasuis serovars 4 and 5 in contact-exposed pigs.
The pathogenicities of Haemophilus parasuis strains SW124 (serovar 4) and Nagasaki (serovar 5) were examined by contact-exposure of specific pathogen-free (SPF) pigs. Ten pigs were divided into three groups. Two of four pigs in the first group were inoculated intranasally (IN) with 2 x 10(8) CFU of strain SW124, and the other two pigs were mingled with these IN-exposed ones. All the four pigs were subclinically infected in this group. The four pigs of the second group were likewise exposed to strain Nagasaki (two IN-inoculated pigs with 3 x 10(8) CFU of strain Nagasaki). All four pigs in this group died of Glässer's disease. Two pigs kept as controls showed neither abnormality nor positive H. parasuis isolation.
Amano
H
H
Institute of Animal Health, Shizuoka Prefecture, Japan.
Shibata
M
M
Kajio
N
N
Morozumi
T
T
D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood; D001921:Brain / Q000382:microbiology; D006190:Haemophilus / Q000145:classification / Q000302:isolation & purification / Q000472:pathogenicity*; D006192:Haemophilus Infections / Q000473:pathology / Q000503:physiopathology / Q000662:veterinary*; D009297:Nasal Mucosa / Q000382:microbiology; D013552:Swine; D013553:Swine Diseases; D014774:Virulence; D014781:Viscera / Q000382:microbiology
D000907:Antibodies, Bacterial