EVALUATION OF THE INFORMATIVE VALUE OF QBC IN THE DIAGNOSIS OF MALARIA USING THE SPIEGELHALTER AND KNILL-JONES METHOD
E. Bissagnené, J.B. Bali, K. Kouadio, J.B. Anguouan & A. Kadio
The information provided by QBC was evaluated using the spiegelhalter and Knill-Jones method from 361 routine thick film samples of blood. The sensitivity of the procedure was 97 %, the specificity 62 %, the positive predictive value 86 % and the negative predictive value 89 %. An informative value of 40 was obtained for the positive result and - 130 for the néegative findings. The positive result for the combined test was even higher with an informative value higher than that of QBC alone (126 vs 40). It can be deduced from this that QBC is more likely to reject the diagnosis due to a negative response than to confirm it through a positive response. The film therefore remains the routine method for the diagnosis of malaria in endemic areas.
KEY-WORDS: Malaria, QBC, Thick film, Informative value
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