1. Performances de la procalcitonine dans le diagnostic de l’infection maternofœtale
- Author
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Chemsi, M., Habzi, A., Harrak, A., and Benomar, S.
- Subjects
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CALCITONIN , *PERFORMANCE evaluation , *DIAGNOSIS of fetal diseases , *PEDIATRICS , *COMMUNICABLE diseases , *INFLAMMATION , *ANTIBIOTICS , *DISEASE risk factors - Abstract
Summary: The maternofetale infection (IMF) establishes one of the major concerns of the paediatrician, the main cause of inflammation and the main part of the prescriptions of antibiotics in the neonatal period. In Morocco, the IMF is responsible for mortality important for the neonatal period. The signs of the IMF are fickle and non-specific, making the early diagnosis often difficult. The purpose of our study is to estimate our protocol of coverage of the suspect of IMF in newborn children, to study the performance of the procalcitonin in the early diagnosis of the IMF and to determining its sensitivity, specificity, predictive value during the first six hours of life. Subject and methods: We led a cohort study over a period of 24 months, going from December 1st, 2009 until November 30th, 2011. For every inclusive newborn child, we proceeded to a dosage of the procalcitonin during the first six hours of life (between H1 and H6) and in a dosage of CRP at H24 of life. Two distinct populations were defined based on clinical, biological and bacteriological criteria:group 1 (infected neonates), and group 2 (non infected neonates). We determined the cut-off value correlated with maternofetal infection by analysing the receiver operating characteristics curve (ROC). Results: The study had interested 99 newborns, of lower age or equal to H6 of life. Seventy-one newborns children were symptomatic in the birth with infectious anamnesis. Twenty-eight newborns children were asymptomatic whose moms had infectious risk factors. Fifty-six newborns (56.6%) were classified in group 1 with 48 likely infections and eight confirmed infections with neonatal meningitis case. The PCT threshold value (≤H6 of life) found by the ROC curve with the highest sensibility (89.29%), highest specificity (100%) and the good negative (87.8%) and positive (100%) predictive value was 1.99ng/mL, making it possible to reduce the abusive use of antibiotics, duration of the antibiotic therapy and the average duration of hospitalization with a statistically significant difference (P <0.001) between the group 1 and 2. The mean value of the PCT (≤H6 of life) in group 1 was significantly higher than in group 2 (14.87±23.79ng/mL versus 0.73l±0.61ng/mL; P <0.001). The procalcitonin is an innovative marker of the infection having a cinetic more premature than that of the other proteins of the acute phase of the inflammation. In our experience, the PCT could establish a good marker in the diagnosis of infection. Our results give evidence in the decision-making threshold of 1.99ng/ml, during the first six hours of life, a better sensibility, of an excellent specificity and of a good negative predictive value. [Copyright &y& Elsevier]
- Published
- 2012
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