Fortier B., Pinto-Sousa M.I., Ajana F. treatment. J. analysis of congenital toxoplasmosis, and (iii) evaluation of the duration of illness. Peripheral blood from newborns was collected by a non-invasive heel-stick puncture during the 1st 3 days of life, soaked up onto Guthrie cards and analysed for anti-specific IgM (1996-1998) or both IgA and IgM antibodies (1998-2000) by non-commercial immunocapture ELISAs. When the testing result was positive, the analysis of congenital illness was confirmed by screening serum samples from your suspected neonate and the mother using a Western blot IgM-IgG comparative immunological profile analysis and traditional serological techniques (ELISA, ISAGA) for anti-IgA, IgM and IgG specific antibodies. From June 1996 to April 2000, 45,169 filter-paper specimens from liveborn neonates were screened: 27,516 samples were tested for specific IgM and the next 17,653 Guthrie cards were analysed from the combined IgA/IgM assay. The prevalence of anti-IgM in filter-paper eluates at birth was 1 per 2,117 liveborn neonates (0.47/1000) or 1 per 1,185 babies (0.84/1000) born to seronegative women having a potential risk of main illness during pregnancy. For the joint detection of IgA and IgM, these values significantly increased to 1 per 929 neonates (1.08/1000) or 1 per 520 pregnancies at risk (1.92/1000) respectively, comparing to the seropositivity rate 4-Guanidinobutanoic acid of 43.7% inside a pregnant women human population in the studied area. In newborns untreated prenatally, the diagnostic level of sensitivity of the IgM ELISA using neonatal Guthrie cards was not more than 86.7% and that of the combined IgA/IgM ELISA was 95%; the diagnostic specificity of the both methods was calculated to be 99.9%. Congenital illness was finally diagnosed in 35 neonates, mostly asymptomatic at birth. Conclusions: (i) The neonatal testing for anti-IgA and/or IgM antibodies is a good sensitivity method for an early postnatal analysis of congenital toxoplasmosis in newborns untreated prenatally. (ii) In the absence of obligatory nation-wide testing during pregnancy followed by an early prenatal treatment, this valuable technique may be regarded as a preventive option in areas of a high annual quantity of births associated with a high seroprevalence of illness. Key phrases: congenital toxoplasmosis, illness during pregnancy in a given geographic area, resulting from the absence of protecting specific IgG antibodies in women in a childbearing age group, a local risk of transplacental transmission of the parasite, and the strain patogenecity. You will find four available strategies to prevent congenital illness: (i) health education concerning sanitary-dietary recommendations how to avoid illness during pregnancy, (ii) preconceptional serological testing and then screening of seronegative pregnant women for illness up to 60%. It is very difficult to evaluate which of preventive strategies is the most effective, economically and psychologically suitable for screened human population, considering the least expensive risk of maternal panic during pregnancy, and possible false diagnosis. So far, the incidence of congenital toxoplasmosis inside a Polish human population was evaluated on a number of registered deaths in severely affected cases and selected symptomatic infections with common clinical signs shown at routine paediatric examination (13-15), which constitute a low percentage of all infected foetuses (16, 17). Majority of congenital infections left undiagnosed or they were supradiagnosed (18). Moreover, indirect epidemiological evaluation of the prevalence of congenital contamination in Poland based on a simple comparison with some other populations having comparable hygienic and dietary habits seems to IL17RA be not sufficient because of proven differences in a patogenecity of strains from numerous geographic areas or another sources of contamination (19), as well as a widely used prevention of spiramycine in pregnant women in West Europen countries (20). In 1990-ties, perinatal screening based on a detection of specific IgM antibody in cord blood using the commercial ImmunoSorbent Agglutination Assay (ISAGA, bioMerieux, France) showed only false positive results in 7 cases of 2,200 newborns given birth to to seropositive mothers in 4-Guanidinobutanoic acid 4 selected obstetrics wards in the West Poland Province, and no common clinical indicators of congenital toxoplasmosis were found in 4,311 successively given birth to neonates (21). The screening results suggested that this incidence of congenital toxoplasmosis in Poland is lower than previously suspected and it may be probably less than 1 per 1000 children given birth to alive (21,22). For this 4-Guanidinobutanoic acid reason, the implementation of the nation-wide serological screening of Polish pregnant women 4-Guanidinobutanoic acid was not accepted by the National Health Services (15), however serological testing is usually widely proposed to pregnant women and in individual suspected cases is recommended by gynaecologists as covered by social care models. Because of the lack of obligatory screening of pregnant women for main contamination in Poland, the Poznan University or college Centre was used the regional screening programme for congenital toxoplasmosis in neonates given birth to in the West Poland area since 1996, in order to determine an actual epidemiological status of congenital toxoplasmosis in Poland, to evaluate a risk of main contamination in a pregnant women populace, and to increase an early postnatal detection of congenital contamination in the Poznan Province. The aims of the regional.