Chapter 19 and Chapter 34 Flashcards
Exam 3
Alternation in normal bowel movement characterized by an increase in the water content, volume or frequency of stools is known as what?
Diarrhea
What is the stomach acidity?
pH of lower than 4
Peristalsis can be found where
Small intestine
Symptoms of rapid onset of diarrhea, lack of fever, absence of blood or pus, and large number of watery stools is what
Enterotoxin-mediated diarrhea
How do people get salmonella
Contaminated or undercooked animal food products
How do people get Shigella
Improper sanitary conditions and poor personal hygiene
How do people get yersinia
By wide variety of animals
ETEC is what?
E.Coli enterotoxigenic
What does ETEC do
Produces adhesions to bind to intestinal mucosa and enterotoxins and is the common cause of traveler’s diarrhea
EIEC is what?
E.coli enteroinvasive
What does EIEC do?
Cause watery diarrhea and the infection is similar to Shigella
EHEC is what?
Enterohemorrhagic
E.coli strain 0157:H7
What E.coli strain is the principal causes
0157:H7
What is EPEC?
enteropathogenic
What is EAEC
Enteroaggregative
What does EAEC adheres to
The intestinal surface but in a more clumped or aggregative fashion
This E.coli affects adults and childern and is rare in the united states
Enteroinvasive E.coli
This E.coli is nonmotile and do not ferment lactose
Enteroinvasive E.coli
This E.coli can cause hemorrhagic diarrhea and colitis
Enterohemorrhagic E.coli (EHEC)
This E.coli can cause watery diarrhea progressing to bloody diarrhea without leukocytes and can be fatal
Enterohemorrhagic E.coli (EHEC)
Toxins produced by shiga toxigenic E.coli (STEC) is what type of E.coli
0157:H7 or known as EHEC
EAEC-Enteriadherent has organisms that adhere to what?
The surface of the small intestine
DAEC (EAEC) may be associated with what
UTIs and diarrheal disease
What are the two types of EAEC
Enteroadherent (EAEC) and DAEC (diffusely adherent
Clear, colorless, nonlactose-fermenting on MAC and colonies with black centers on HE or XLD
Salmonella
The most common form of S. enterica
S. enterica subsp. Enterica
What causes typhoid fever
S. typhi
Enterotoxin is involved in gastroenteritis
Has the ability to traverse intestinal mucosa
Fimbriae is used in initiating intestinal infection
Salmonellae
Cause acute gastroenteritis/food poisoning, typhoid fever, nontyphoid bacteremia
Salmonellae
This can cause prolonged fever, bacteremia, and involvement of the reticuloendothelial system, and dissemination to multiple organs
Salmonella typhi (Typhoid fever)
Small masses of lymphatic tissue found throughout the ileum region of the small intestine
Peyer’s patches
