Studying Infectious Dis

Question 1

Mortality

Answer 1

o Ds in a pop

Question 2

Morbidity

Answer 2

# o ppl infected/ incidence of illness in pop
-mo useful b/c tell how many ppl affected by Dis.

Question 3

Info needed to study infectious Dis?

Answer 3

Dis.
Causative agent (species)
infectious source
reservoirs
control measures
gram reaxn
org morph
toxins

Question 4

Organisms to consider

Answer 4

C. difficile
Y. pestis
Y. Enterocolitica
Y. pseudotuberculosis

Question 5

C difficile

Answer 5

-gram +
Rod structure
-fecal-oral trans
-virulence factors= spores (a+ b toxins)
-symptoms= antibiotic diarrhea,    psuedomembraneous cloitus

Question 6

Y. pestis

Answer 6

-gram -
rod-shaped coccobacillus
di-polar staining
-flea-rat interaxn+ lifecycle trans
-virulence factors= plasmids, capsules, lipopolysaccharide
-Symptoms= buboes, septic shock, pneumonic+ bubonic plague

Question 7

Y. Enterocolitica

Y. pseudotuberculosis

Answer 7

• food-water trans (not insect)
• virulence factors= adhesions, invasions» inflammation, crosses C membranes
• symptoms= gastroenteritis

Question 8

Dis reservoirs

Answer 8

• sources that harbor disease causing organisms
• potential outbreak source
• animal, animate, or inanimate

Question 9

Prions

Answer 9

• proteinaceous infectious particles
• no DNA/ RNA
• generally harmless proteins (brain)
• abnrm» convert prtns into infectious dis causing prtns
• mad cow, dementia

Question 10

Algae

Answer 10

• photosynthetic prokaryotes
• dinoflagellates +diatoms (primary source of ocean food)
• dinoflag toxin» human&raquo_space;neuro probs+ D
• algae blooms= release of large amnt of toxin» neuro probs in fishermen» concern for consumers.

Question 11

protozoans facts

Answer 11

• protozoans resemble phagocytic cells of immune system

- bacteria to obtain traits to evade being protozoan “lunch”

Question 12

foodborne outbreak

Answer 12

2+ ppl get same illness from same contaminated food or drink

Question 13

Clostridium botulinum

Answer 13

Produces most powerful toxin on the planet» used for botox!