Use of the lab in diagnosis of infection Flashcards

1
Q

What are the best kind of specimens to send to the lab to guide diagnosis?

A

Tissue, fluid or aspirate

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2
Q

When is a swab an appropriate specimen for diagnosis in the lab?
What kind of swab?

A
Diagnosing a virus 
Viral swab (green top)
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3
Q

What is a yellow top swab appropriate for?

A

Serology

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4
Q

Once the specimen has been taken what is needed next?

A

Label and process it quickly

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5
Q

What appropriate clinical information is required on the label?

A

Biohazard sticker if the patient is suspected to be highly contagious
Date and time of sample and patient location
requestor name, consultant and contact details
investigations required
Presenting complaint
Comorbitities
Allergies
Current and past treatments

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6
Q

When the specimen reaches the lab who does it go through

A

Received, registered and processed by health care science assistants
Examination testing performed by biomedical scientist
Validation of examination performed by medical practitioner specialising in microbiology

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7
Q

How long will it take for the tests to come back?

A

Check the Newcastle intranet and find the turnaround time

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8
Q

Specimen rejection criteria

A

Minimum essential information is missing in sample or request form
Sample and request form information do not match
Sample is unlabelled or unsuitable (wrong tube)

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9
Q

Bacterial culture process

A

Inoculation
Incubation
reading agar plates
identification

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10
Q

Fastidious organism

A

Organism with complex nutritional needs

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11
Q

Antibiotic susceptibility testing process

A

Inoculation, incubation, realign agar plates (clear area around the antibiotic sample), interpretation

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12
Q

List 4 others tests done in a lab other than bacterial culture and antibiotic susceptibility?

A

Serology (HIV hepatitis virus)
Mycobacteriology (TB)
Mycology (fungal infections)
Molecular diagnostics (herpes virus PCR)

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