Chronologic change of serum IgG antibody response in chickens reinfected with Cryptosporidium baileyi.
10.3347/kjp.1996.34.4.255
- Author:
Jae Ku RHEE
1
;
Hyeon Cheol KIM
;
Bae Keun PARK
Author Information
1. Bio-Safety Research Institute, Chonbuk National University, Chonju 561-756, Korea.
- Publication Type:Original Article
- MeSH:
parasitology-protozoa;
Cryptosporidium baileyi;
chicken;
IgG;
immunology
- From:The Korean Journal of Parasitology
1996;34(4):255-258
- CountryRepublic of Korea
- Language:English
-
Abstract:
Eight 2-day-old SPF chickens were each inoculated orally with a single dose of 5+O105 oocysts of Cryptosporidium baileyi, and immunoglobulin G (IgG) antibody responses were chronologically measured by indirect immunofluorescent antibody (IFA) assay. Anti-C. baileyi IgG antibody levels remained high(1:106.67 to 1:512.00) for at least 4 months with 330 days of a detectable period. Ten days after the negative conversion, each chicken was re-challenged with 1+O107 oocysts of the same species. Subsequent infection in 340-day-old individuals caused sudden elevated IgG antibody levels and the titer peaked on day 28 postchallenge inoculation(PCI), at 1:1,024 with a 65 days of detection period. Chickens in primary infection showed oocyst shedding profiles, but did not exhibit any oocyst shedding before or after experimental reinfection.
