Intro To Microbiology Flashcards
What is unusual about chlamydiae species
They are obligate intracellular bacteria- must be inside a host cell
What type of bacteria has a thick cell wall and no outer membrane?
gram pos
What gram and shape is pseudomonas?
Gram negative bacilli
What gram and shape are streptococcus
Gram positive cocci
What gram and shape are borrelia burdgorefi?
Spirochete, diderm (not G+ or G-)
What is the gram type and shape of neisseria gonorrhoeae?
Gram negative diplococci
Aerobic
Why is pseudomonas so hard to treat?
They have a biofilm, and they are hypermutable. Must treat w/ 2 abx
What is a plasmid?
Small bit of DNA in the bacteria that is usually where antibiotic resistance genes are found
Are e. Coli part of the normal flora?
Yes
What is the major difference between bacterial cells and human cells?
Bacteria have a rigid cell wall of peptidoglycan
What gram and shape are h. Pylori?
Gram negative helical
What is staph aureus’s gram and shape
Gram positive cocci
What two chlamydiae species are the major human pathogens?
C. Pneumoniae
C. Trachomitis
Are chlamydiae species part of our normal flora?
No
What do H. Pylori cause?
Stomach cancer
Why cant you use drugs that target cell walls for mycobacteria, chlamydiae, and mycoplasmas?
They have either no cell wall, or a cell wall that differs from other bacteria
What does an acid-fast stain test for?
Mycobacteria
What gram type is clostridium difficilie?
Gram positive anaerobe
What are facultative bacteria?
Bacteria that can grow in the presence or absence of oxygen
What type of E. Coli produces the shiga toxin?
O157:H7
Common cause of food poisoning
What condition is caused by an overgrowth of C.diff?
Pseudomembranous colitis. Deadly
Are borrelia burdgoreferi part of our normal flora?
No
Which type of bacteria has an outer membrane and a thin cell wall?
Gram neg
What is E. Coli’s gram and shape
Gram negative bacilli
