Lecture 2 - Common Bacterial Infections 2

Question 1

What does streptococcus mutans cause and what is the treatment?

Answer 1

Grows on plaque on teeth, produces lactic acid causing tooth decay
Treatment - fillings and extractions

Question 2

What is a tooth abscess and how is it treated?

Answer 2

Infection from tooth decay spreads to the underlying tissue bone
Treatment - antibiotics and dental treatment

Question 3

What bacteria causes periodontal disease (gum disease)?

Answer 3

Bacteroides, actinomyces
Bacteria colonise between the teeth and the gums, making gums inflamed and bleed

Question 4

How is gum disease treated?

Answer 4

Good oral hygiene

Question 5

Name 4 common examples of GI bacteria

Answer 5

E.coli, Salmonella enterica, shigella, campylobacter

Question 6

Name the 4 types of organisms that cause GI infections

Answer 6

Viral
Protozoa
Parasites
Bacterial

Question 7

What does Enterohaemorrhagic E.coli do?

Answer 7

Bacteria bind to epithelial cells of large intestine and produce toxins which act on the cells excrete fluid and cause diarrhoea

Question 8

What do Enterotoxigenic (ETEC) E.coli do?

Answer 8

Bind to epithelial cells of the small intestine, produce plasma asscoiated toxins which act directly on these cells and cause diarrhoea

Question 9

What does food poisoning result in?

Answer 9

Results from bacterial toxins present in food and not a result of a bacterial infection

Question 10

When do food poisoning symptoms occur?

Answer 10

When the toxin reaches the small intestine