Chapter 25: Microbial Diseases of the Digestive System

Question 1

plaque is caused by which bacteria

Answer 1

s mutans

Question 2

Gingivitis is caused by which bacterias

Answer 2

• s mutans
• bacteriodetes
• fusobacterium

Question 3

Peritonitis

Answer 3

bactereiodetes: pus
- caused by: porphysomanas gingivitis

Question 4

what are the 5 stages of tooth decay

Answer 4

1. healthy tooth with plaque
2. decay in enamel
3. advanced decay
4. decay in dentin
5. decay in pulp

Question 5

what are the 4 stages of periodontal disease

Answer 5

1. healthy gingivae
2. gingitivitis
3. periodontal pockets
4. periodontitis

Question 6

infection

Answer 6

long incubation period

Question 7

intoxication

Answer 7

• food with mulitplied bacteria

Question 8

example of intoxification

Answer 8

straphylococcus

Question 9

whata are the symptoms of gastroenteritis

Answer 9

• nausea
• vomiting
• diarrhea/dysentery/constipation
• fever?
  -shock?

Question 10

what is the treatment for gastroenteritis

Answer 10

oral rehydration treatment (ORT)
or
antibiotics

Question 11

Sttaphylococcal aureus

Answer 11

• causes: food poisoning
• superantigen
• Symptoms: nausea, vomiting, diarrhea
• abrupt, violent immediately after eating a meal

Question 12

s. Dysenteriae

Answer 12

• produces shiga toxin
• inflammation in the large intestine
• 20 bowel movements (dehydration)
• fecal oral route of entry
• common in daycares
• treatment: ORT, fluroquinolones

Question 13

shiga toxin

Answer 13

Classic A+B
- inhibits protein synthesis –> absece forms –> scar

Question 14

s. entrica

Answer 14

• food borne infection (poultry, beef, eggs, vegetables)
• pets –> can spread
• treatment: ORT

Question 15

s. typhi

Answer 15

• spread through human carriers (gallbladder)
• fecal oral route of entry
• symptoms: sever diarrhea (short lived), then constipation, severe haemorrhaging, rose spots, extremely high fever
• treatment: cephlosporins
• example: typhoid mary

Question 16

Cholera

Answer 16

• vibrio
• classic A+B exotoxin (triggers cAMP –>converts cells to pumps)
• symptoms:rice water stool
• treatment: ORT, Tetracycline
• example: Hatti 2010

Question 17

how many strains of e coli is there

Answer 17

5

Question 18

what are th 5 strains of E coli

Answer 18

• Enterio-Toxigenic E coli (ETEC)
• Aggregated (EAEC)
• EPIC
• Invasive EIEC
• hemohegic (EHEC)

Question 19

ETEC

Answer 19

• 65% of traveler diarrhea

Question 20

EAEC

Answer 20

• 35% of travellers diarrhea
• stacked brick

Question 21

EPIC

Answer 21

• common in bottle fed newborns
• chronic diarrhea

Question 22

EIEC

Answer 22

• dysentery
• similar to shiga

Question 23

EHEC

Answer 23

• has become a syndrom
• HUS

Question 24

Camphylobacter Gastroenteristis

Answer 24

Pathogen: camphylobacter jejuni
- symptoms: abdominal pain, diarrhea
- rare: guillina-barre-Syndrom (paralysis)

Question 25

h pylori ulcer

Answer 25

• flangella
• exotoxin
• destorys phagocytes
• Diagnosis: urea breath, bacterial culture
• symptoms: peptic ulcers (15%), carcinogenic bacterium (3%), extreme belching
• treatment: metronidoazole

Question 26

what does the exotoxin in h pylori do

Answer 26

• inbitis acid production
• produces enzyme urease
• digest urea into amonia
• changs pH to alkaline

Question 27

c diff

Answer 27

• severe pseudomembranous colitis
• A+B exotoxin
• endospores
• nosocrominal infection
• Symptoms: diarrhea, life threatening colitis
• caused by long term antibiotic use
• Diagnosis: isolate bacteria
• common in daycare centers
• Reservoir: stool of many healthy adults

Question 28

Mumps

Answer 28

• vaccine: MMR; no antivirals
• entry: respiratory tract (paratoid gland)
• incubation ( 16-18 days)
• symptoms: fever (chills), difficulty chewing (anorexia), difficulty talking, viremia

Question 29

review herpes chart