This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Bacterial count in doudenum 
Select and explain. 
A. 105 per gram, B. 10' per gram, C. 1010 per gram, D. 10'2 per gram
A: 105 per gram
Answer: A: 105 per gram 
Explanation: Ans. is 'a' i.e., 105 per gram In GIT of an adult : Duodenum - -4 103 - 106 bacteria per gram. Jejunum and proximal ileum - 10' - 108 bacteria per gram Lower ileum and cecum - 108 - 1010 bacteria per gram Colon and rectum - 10" - 1012 bacteria per gram Colon and rectum have maximum number of bacteria and most of them (96-99%) are anaerobes : Anaerobic streptococci Clostridia Anaerobic lactobacilli Bacteroides