Author(s): Ponte, Paulo Roberto Lins ; de Medeiros, Pedro Henrique Quintela Soares ; Havt, Alexandre ; Caetano, Joselany Afio ; Cid, David A.C. ; de Moura Gondim Prata, Mara ; Soares, Alberto Melo ; Guerrant, Richard L. ; Mychaleckyj, Josyf ; Lima, Aldo Ângelo Moreira
Date: 2016
Origin: Oasisbr
OBJECTIVE: This work aimed to evaluate and correlate symptoms, biochemical blood test results and single nucleotide polymorphisms for lactose intolerance diagnosis. METHOD: A cross-sectional study was conducted in Fortaleza, Ceará, Brazil, with a total of 119 patients, 54 of whom were lactose intolerant. Clinical evaluation and biochemical blood tests were conducted after lactose ingestion and blood samples were collected for genotyping evaluation. In particular, the single nucleotide polymorphisms C>;T-13910 and G>;A-22018 were analyzed by restriction fragment length polymorphism/polymerase chain reaction and validated by DNA sequencing. RESULTS: Lactose-intolerant patients presented with more symptoms of flatulence (81.4%), bloating (68.5%), borborygmus (59.3%) and diarrhea (46.3%) compared with non-lactose-intolerant patients (p
