Pharmacology Lecture 7_Gram Negative Bacteria Flashcards
What are some of the major Enterobacteriaseae sub classes
Escherichia, salmonella, Shigella
How does neisseria typically present
diplococci (pair of two), catalase possitive (except N. elongota), oxidase positive (turns purple)
What are two gram negative cocci
Neisseria and Moraxella (Neisseria is the more clinically significant of the two)
What does Acinetobacter Baumannii cause
infections in wounded soldiers
What does Pseudomonas aeruginosa cause?
lung and UT infections
What do Haemophillus Influenza and Pastoral Multicidia have in common
They are both gram negative bacilli that lack the full rod structure and are more cocco-bacilli
Describe MacConkey agar
it contains bile salts that restricts growth to gram negative bacteria (and is thus selective) and it turns pink in the presence of lactose fermentation (and thus differentiates as well)
What does Escherichia Coli cause
food poisoning, UT infection, gastroenteritis, newborn meningitis
What does klebsiella cause?
Meningitis; lung , UT, and blood infections
How are neisieria and Moraxella typically cultured?
They can be cultured on blood augar, chocloate augar, and thayer martin agar (thayer-martin is chocloate agar that has been treated with antibiotics to supress the growth of gram possitive bacteria.
What does enterobacteriaceae cause
food poisoning, UT, Lung, and blood infections
What are the 4 most common risk factors for gram negative bacteria
Hospitalization, Use of urinary catheter, Dialysis, Weakend immune system (also war wounds, recent surgery, and mechanical vent)
