Cystine Glucose Blood Agar- Composition, Principle, Preparation, Results, Uses


Cystine Glucose Blood Agar (CGBA) is a selective and differential medium that is used for the isolation and identification of Francisella tularensis, the causative agent of tularemia. Tularemia is a zoonotic disease that can affect humans and animals, and is transmitted by various vectors such as ticks, flies, rodents, and rabbits. The symptoms of tularemia vary depending on the route of infection, but they may include fever, headache, lymphadenopathy, ulceration, pneumonia, and septicemia. F. tularensis is a gram-negative coccobacillus that requires special media and conditions for growth, as it is fastidious and highly virulent. CGBA is one of the recommended media for the cultivation of F. tularensis from clinical specimens such as blood, sputum, lymph node aspirates, and ulcer swabs.