25 Questions
What is one of the additional tests used for further identification of Campylobacter species?
Nitrate reduction test
Which of the following tests is NOT used for further identification of Campylobacter species?
Urease test
What is the purpose of using additional tests like nitrate reduction for Campylobacter species?
To identify the specific species of Campylobacter
Which of the following is a characteristic of Campylobacter species that can be identified using additional tests?
Oxidase-positive reaction
Why are additional tests like nitrate reduction necessary for Campylobacter species identification?
Because they require further biochemical characterization
From which source can a fetus occasionally be recovered?
Blood cultures
Which type of patients are more likely to have a fetus recovered from their blood cultures?
Elderly and immunocompromised patients
What is the primary purpose of blood cultures?
To identify bacterial infections
In which circumstance is it possible to recover a fetus from blood cultures?
In cases of suspected infection
What is the significance of recovering a fetus from blood cultures?
It indicates a possible infection
What is the primary cause of illness associated with C. jejuni?
Diarrhea
Which of the following Campylobacter species is the most commonly isolated from humans?
C. jejuni
Which of the following is NOT a species of Campylobacter that is less commonly isolated from humans?
C. jejuni
What is the role of C. jejuni in human disease?
It is a very common cause of diarrhea
Which of the following statements about Campylobacter species is TRUE?
C. jejuni is a common cause of diarrhea, while other species are less commonly isolated
What is the purpose of collecting blood samples in the diagnosis of H. pylori?
To determine serum antibodies
What type of samples are collected for H. pylori antigen detection?
Stool samples
What is the significance of detecting serum antibodies in H. pylori infection?
It confirms the diagnosis of H. pylori infection
Which of the following samples is not used for H. pylori antigen detection?
Blood samples
What is the relationship between H. pylori and serum antibodies?
Serum antibodies are produced in response to H. pylori infection
Where is the tissue for culture typically obtained from?
Gastric mucosa
What procedure is used to obtain tissue for culture from the gastric mucosa?
Endoscopy and biopsy
What is the source of the tissue used for culture?
Gastric mucosa
What is the purpose of obtaining tissue from the gastric mucosa?
To diagnose a bacterial infection
What is the method used to obtain tissue from the gastric mucosa for culture?
Endoscopy and biopsy
Study Notes
Campylobacter Species
- C. jejuni is the prototype organism and a common cause of diarrhea in humans.
Other Campylobacter Species
- C. fetus, C. coli, and C. Follow are less commonly isolated from humans.
Morphology and Identification
- Nitrate reduction test is used for further identification of Campylobacter species.
C. fetus
- May occasionally be recovered from blood cultures, usually from immunocompromised or elderly patients.
Diagnostic Laboratory Tests
- Blood is collected for determination of serum antibodies.
- Stool samples may be collected for H. pylori antigen detection.
- Tissue for culture is obtained by endoscopy and biopsy of the gastric mucosa.
This quiz covers the characteristics and identification of Campylobacter species, including C. jejuni and C. fetus, as well as diagnostic laboratory tests.
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