Korean J Parasitol.  1996 Dec;34(4):255-258. 10.3347/kjp.1996.34.4.255.

Chronologic change of serum IgG antibody response in chickens reinfected with Cryptosporidium baileyi

• Rhee JK
• Kim HC
• Park BK

• KMID: 1715345
• DOI: http://doi.org/10.3347/kjp.1996.34.4.255

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.

MeSH Terms

parasitology-protozoa
Cryptosporidium baileyi
chicken
IgG
immunology