The respiratory tract infections are usually mild and selflimited. Owing to their frequency, recurrent respiratory tract infection among children and adults constitute a major global health problem. The goal of our study was to observe 20 children with recurrent respiratory tract infections. The control group consisted of 15 healthy children. The study was conducted by the simple randomization method. The LDH level in study group was 178.2MEl , and in control group 64.2MEl p0.01.
According to our research results, neopterin level 19.5nmoll was higher in the study group than in a control group 7.2nmoll p0.01. During the infection the neopterin level usually increased before the first symptoms appeared and before formation of specific antibodies become detectable.