Avidity of immunoglobuling antibody response to the different antigenic fractions of soluble Schistosoma mansoni adult worm antigen preparation [SWAP] using Avidity Immmunoblotting assay
Journal of the Egyptian Society of Parasitology. 2004; 34 (2): 543-58
in English
| IMEMR
| ID: emr-66755
ABSTRACT
Human serum samples from 25 acute schistosomiasis patients, 20 chronic cases and 15 normal healthy controls were analyzed by IgG avidity enzyme linked immunosorbent assay [ELISA] and IgG avidity immunoblotting assay. Using avidity ELISA, a pronounced overlap of avidity index values was observed between acute and chronic infections with a range of uncertainty [0.86-1], which was encountered in both groups. Using avidity immunoblotting assay, antigenic bands at >116, 84, 48, 40 and 34 kDa were exclusive for the acute phase. From these bands, 34 kDa was recognized mostly by low-avidity antibodies and showed a high sensitivity [96%] and specificity [100%], making it an optimal marker for the acute phase. 40 kDa band was recognized mostly by high-avidity antibodies, even during acute infection. Bands of 80, 70, 42, 36, 30 and 26 kDa were exclusive for the chronic phase. Only 70 kDa band was recognized by high-avidity antibodies, yet with low sensitivity [35%] that limits its use as an optimal marker for the chronic infection. Meanwhile, 70 and 40 kDa bands, recognized by high-avidity antibodies, are considered as potential vaccine antigen candidates
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Index:
IMEMR (Eastern Mediterranean)
Main subject:
Schistosoma mansoni
/
Immunoglobulin G
/
Immunoblotting
/
Antigens, Helminth
Limits:
Female
/
Humans
/
Male
Language:
English
Journal:
J. Egypt. Soc. Parasitol.
Year:
2004
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