Ch. 25: Microbial Diseases Of The Digestive System Flashcards
What causes dental caries?
Bacteria in the mouth
What pathogen causes dental caries?
Primarily Streptococcus mutans
What do the bacteria do in the mouth to develop the caries?
What happens if ignored?
- They first form biofilms, which become plaque
* If ignored and gets calcified it becomes calculus.
Why don’t you want to caries getting into the pulp?
Because it has access to the bloodstream, which are where the capillaries are
If cavities are ignore they can progress to?
Periodontal Disease
What’s a common beginning indicator of gingivitis?
Gums that bleed easily
What pathogen causes periodontal disease?
Primarily Porphyromonas spp.
What pathogen causes salmonellosis?
Salmonella enteric a
What does salmonella like to go on?
- Eggs
- Some dairy products
- Reptiles (turtles)
What is cholera caused by?
Vibrio cholera
Why is ORT responsible for saving more lives than IRT (Intravenous Rehydration Therapy)?
Because most people don’t have access to hospitals, they can do it at home (parts of the world with extreme poverty)
What’s the most successive treatment globally for cholera?
ORT (Oral Rehydration Therapy)
What is salmonella a member of?
- Entrobacteria, but not a normal member of the commensals
* You get sick not but overgrowth but by the introduction of salmonella in the G.I. tract
H. pylori is the cause of?
Peptic ulcers (or peptic ulcer disease)
H. pylori love to produce what?
Ammonia (NH3^+ + H), which gobbles up protonsmade by the stomach mucosa
Clostridium Difficile Associated Diarrhea (CDAD) is mostly spread by?
Spores through fecal contamination or vomit
What’s the hyper-virulent strain of CDAD?
- BI/NAP1/027
* It produces more toxins A and B, it can hyper sporulate and secrete bi-valent toxins which others don’t
What do hepatitis B and C have common?
- They infect the liver
- Responsible for end-stage liver infection and cancer
- Chronic Infection
Is there a vaccine for hepatitis B?
Yes, given at birth
How do you get hepatitis B and C?
Hep B: Blood transfusion and sharing needles
Hep C: Bodily fluids (sexually)
Noro Virus
- # 1 cause of food borne Viral Gastroenteritis (Infection of GI)
- HAI
- Cruise ship passengers
Ascariasis
- Helminths (round worm) that begins in the intestinal tract
- Protozoan disease
- 1.5 billion infected
If you’ve had hepatitis for more than six months you’re considered?
Chronic
15% progress to chronic stage
Hep B infections are self limiting
Dental carries are also known as?
Cavities (caries) and plaque
Dysentery
Diarrhea accompanied by blood and mucus
Types of Periodontal Disease
Gingivitis and periodontitis
What toxin does EHEC produce?
Shiga toxin, causes watery diarrhea
Dysentery
Diarrhea accompanied by blood and mucus
Types of Periodontal Disease
Gingivitis and periodontitis
What toxin does EHEC produce?
Shiga toxin, causes watery diarrhea
Cause of dental caries?
Lactobacillus and strep mutans
Process of Dental Caries
Forms Biofilm -> Plaque -> Calculus -> Carries -> Cavities
Salmonellosis can induce ________ if in the bloodstream.
Septic shock
Where can you get Salmonellosis from?
Egg, diary, reptiles (turtles)
