Microbiology: Microbiology Chapter 25 Diseases of the Gastrointestinal Tract Flashcards

Diseases of the ___________ are the second most common illnesses in the United States.

Diseases of the digestive system usually result from ingesting _____________________________

The fecal–oral cycle of transmission can be broken by the:
____________________
____________________
____________________.

True or False
Small numbers of bacteria colonize the mouth

True or False:
The stomach and small intestine have a lot of resident microorganisms

Bacteria in the large intestine assist ______________________________________

Up to _____ of fecal mass is microbial cells

_______________, found in the mouth, uses sucrose to form dextran from glucose and lactic acid
from fructose

Bacteria adhere to teeth by the sticky _________, forming dental plaque

Caries of the cementum and gingivitis are caused by
-
-
-

Acute necrotizing ulcerative gingivitis is often caused by -----------------

Staphylococcal food poisoning is caused by the ingestion of an _________ produced in improperly
stored foods.

S. aureus is inoculated into foods during __________. The bacteria grow and produce enterotoxin in food stored at room temperature

True or False
Boiling for 30 minutes is not sufficient to denature the exotoxin

Foods with high osmotic pressure (like salt) and those not cooked immediately before consumption are most
often the source of _____________________________

Shigellosis (Bavillary Dysentery) is caused by any of four species of ______________

Symptoms include blood and mucus in stools, abdominal cramps, and fever.

Infections by __________result in ulceration of the intestinal mucosa

Salmonellosis, or Salmonella gastroenteritis, is caused by many ____________________________

Symptoms include nausea, abdominal pain, and diarrhea and begin 12 to 36 hours after eating large numbers of Salmonella

True or False
Salmonellosis can cause Septic shock to occur in infants and in the elderly

True or False
Cooking food will usually kill Salmonella

_________ causes typhoid fever; the bacteria are transmitted by contact with human feces

S. typhi is harbored in the ___________ of carriers

Typhoid fever is treated with ___________ and ________

Vibrio cholerae O:1 and O:139 produce an exotoxin that ________________________________________

Vibrio gastroenteritis can be caused by ______________________ and _______________________

Noncholera Vibrios diseases are contracted by __________________________________

Traveler’s diarrhea may be caused by enterotoxigenic or enteroinvasive strains of __________.

___________ is the second most common cause of diarrhea in the United States

Campylobacter is transmitted in

___________________ produces ammonia, which neutralizes stomach acid; the bacteria colonize the stomach
mucosa and cause peptic ulcer disease.

with Yersinia Gastroenteritis ____________ and _______________ are transmitted in meat and milk.

True or False:
Yersinia can grow at refrigeration temperatures

Growth of__________ following antibiotic therapy can result in mild diarrhea or severe colitis.

True or false C. diff condition is usually associated with hospitalized patients and nursing home residents.

Mumps virus enters and exits the body through the ____________________

This virus causes inflammation of the parotid glands, fever, and
pain during swallowing. About 4 to 7 days later, orchitis may occur in males.

With Mumps After onset of the symptoms, the virus is found in the
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-
-

Inflammation of the liver is called _________

Viral causes of hepatitis include hepatitis viruses, _____________ (___), and ____________ (___).

_____________ (____) causes hepatitis A

HAV is ingested in contaminated food or water

HAV grows in the

The virus is eliminated with ________

_____________ causes hepatitis B, which is frequently serious

HBV is transmitted by

True or False
The average incubation period is 3 months; recovery is usually complete, but some patients develop
a chronic infection or become carriers.

Hepatitis C virus (HCV) is transmitted via

Viral gastroenteritis is most often caused by a ___________ or _________________

Ergot poisoning, or ergotism, is caused by the mycotoxin produced by _______________

____________ are the crop most often contaminated with the Claviceps mycotoxin

Giardia lamblia grows in the intestines of humans and wild animals and is transmitted in

Cryptosporidiosis causative agent is

Crytosporidium hominis causes diarrhea

Crytosporidium hominis is transmitted in

Cyclospora Diarrheal Infection is caused by

Cyclospora Diarrheal Infection is transmited by

Amoebic dysentery is caused by ___________________ growing in the large intestine

Tapeworms are contracted by the consumption of _____________________ containing
encysted larvae (cysticerci

The ________ attaches to the intestinal mucosa of humans (the definitive host) and matures into an adult
tapeworm

_________________ in humans occurs when the pork tapeworm larvae encyst in humans

Humans are the __________ host for pinworms

Pinworms are acquired by

how do you contract hookworms

hookworm larvae hatch from eggs _________

Ascariasis is caused by

Ascaris lumbricoides adults live in _________________

Ascariasis is acquired by _____________

Trichinellosis is contracted by

Adult females mature in the 1._______ and lay eggs; the new larvae migrate to invade 2._______

Trichinellosis Symptoms include