Evaluation of a recombinant rhoptry protein 2 enzyme-linked immunoassay for the diagnosis of toxoplasmosis acquired during pregnancy
Mem. Inst. Oswaldo Cruz
; 110(6): 732-738, Sept. 2015. tab, graf
Article
in En
| LILACS
| ID: lil-763098
Responsible library:
BR1.1
ABSTRACT
The aim of this study was to evaluate an enzyme-linked immunoassay with recombinant rhoptry protein 2 (ELISA-rROP2) for its ability to detectToxoplasma gondii ROP2-specific IgG in samples from pregnant women. The study included 236 samples that were divided into groups according to serological screening profiles for toxoplasmosis unexposed (n = 65), probable acute infection (n = 48), possible acute infection (n = 58) and exposed to the parasite (n = 65). When an indirect immunofluorescence assay forT. gondii-specific IgG was considered as a reference test, the ELISA-rROP2 had a sensitivity of 61.8%, specificity of 62.8%, predictive positive value of 76.6% and predictive negative value of 45.4% (p = 0.0002). The ELISA-rROP2 reacted with 62.5% of the samples from pregnant women with probable acute infection and 40% of the samples from pregnant women with previous exposure (p = 0.0180). Seropositivity was observed in 50/57 (87.7%) pregnant women with possible infection. The results underscored that T. gondii rROP2 is recognised by specific IgG antibodies in both the acute and chronic phases of toxoplasmosis acquired during pregnancy. However, the sensitivity of the ELISA-rROP2 was higher in the pregnant women with probable and possible acute infections and IgM reactivity.
Key words
Full text:
1
Index:
LILACS
Main subject:
Immunoglobulin G
/
Enzyme-Linked Immunosorbent Assay
/
Protozoan Proteins
/
Toxoplasmosis
/
Pregnancy Complications, Parasitic
/
Membrane Proteins
/
Antigens, Protozoan
Type of study:
Diagnostic_studies
/
Evaluation_studies
/
Prognostic_studies
Limits:
Female
/
Humans
/
Pregnancy
Language:
En
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
MEDICINA TROPICAL
/
PARASITOLOGIA
Year:
2015
Type:
Article