Breath gas analyzers for medical diagnostics for detecting infectious diseases, carcinomas, Helicobacter pylori, ketosis, and asthma; medical diagnostic apparatus used in implementing diagnosis and screening tests designed to detect bacterial, viral, fungal, and protozoa infectious diseases and non-infectious diseases, namely, cardiovascular, circulatory, respiratory, pulmonary, digestive tract, vascular, neurological, carcinomas, injury- and age-related biological insult and congenital condi...