Question

Why are gram-negative bacteria usually pathogens?

Answer 1

Gram-negative bacteria:

1. In gram-negative bacteria, the peptidoglycan layer is much thinner than that of gram-positive bacilli.
2. Gram-negative bacteria are therefore harder to kill because of their harder cell wall.
3. When their cell wall gets disturbed, the gram-negative bacteria starts releasing endotoxins which could cause problem in already persistent disease making it worsen the condition.