Yuphin Kongphrai. Study the membrane protein antigens of Leptospira that react with Leptospirosis patients' Sera. Master's Degree(Tropical Medicine ). Mahidol University. : Mahidol University, 2006.
Study the membrane protein antigens of Leptospira that react with Leptospirosis patients' Sera
Abstract:
Leptospirosis is an emerging zoonosis caused by pathogenic spirochetes
belonging to the genus Leptospira. The identification of the leptospiral antigens
expressed during infection is important implications for the development of new
serodiagnostic test. We used the humoral immune response to detect leptospiral
protein antigens expressed during infection. The immunoblot analysis was performed
using sera from confirmed leptospirosis patients and sera from patients with other
febrile diseases in addition to healthy individuals as controls. The immunoblot
analysis was performed among 115 sera of confirmed leptospirosis patients. The 23
distinct leptospiral bands with molecular weight ranged from 18-125 kDal were
detected. Ten proteins, p76, p67, p62, p58, p48, p37, p36, p32, p21 and p19 were
predominant and included for further analysis. The identifying of these protein bands
by comparative study among patients and control subjects revealed three
immunoreactive protein bands of p19, p21 and p48 as potentially specific for
diagnosis and able to differentiate from other febrile disease such as scrub typhus and
dengue fever investigated in this study. These three proteins are also the indicator
presented during recent infection as healthy person living in the endemic area who
may be exposed to leptospirosis in the past, could not be detect with their sera.