BAC-T-2

Preferred manner of collection for urine

to confirm that the specimen is sputum, we use ____. What is the (+) result ?

• Barlett's classification: Less than 10 Squamos Epithelial Cells and more than 25 PMNs

• Oxalic determination: Less than 10 Squamos Epithelial Cells and more than 25 PMNs

• Barlett's classification: more than 10 Squamos Epithelial Cells and more than 25 PMNs

• None

For non sterile sputum collection ,what are the gold standard digesting and decontaminating agent?

• Zephiran- Trisodium Phosphate; 5% oxalic acid

• N- acetyl-l-cysteine; NaOH

• N- acetyl-l-cysteine; Oxalic acid

• Z-TSP; NaOH

The most common cause of UTI in young females

specimen to collect if the patient is intubated /on a ventilator

Which of the following is UNTRUE

• Dilution factor - 1000: 1ul loop

• Dilution factor - 100: 10 ul loop

• Colony count: <100, 000

• formula = colonies counted x dilution factor

Answer explanation

COLONY COUNT: > 100, 000

Used to support the growth of fastidious organisms

• Enriched media

• Enrichment media

• Selective media

• Biphasic media

Select the selective differential media

• Mac

• EMB

• TCBS

• ONPG

• MHA

Acts as an inhibitor in CTBA

• potassium citrate

• potassium oxalate

• potassium tellurite

• potassium cyanide

selective media for mycobacterium