Blood stain lab

Question 1

When is a thin blood film/blood smear used?

Answer 1

When there is an abnormality in FBC

Question 2

What can a FBC be used for?

Answer 2

To give information on numbers of RBCs, WBCs and platelets. This can indicate if an infection is viral, bacterial or parasitic.

Question 3

What does a Blood smear show?

Answer 3

Useful for identifying abnormal cell types and morphology

Question 4

Why is a blood smear not a routine investigation?

Answer 4

It is expensive
It is labour intensive
It requires expertise to interpret

Question 5

what type of pathogen may be present if there is an increase in Neutrophils?

Answer 5

Bacteria

Question 6

If a virus pathogen is present, which WBC will increase in number?

Answer 6

Lymphocytes

Question 7

What types of pathogen is present if there is an increase in Monocytes?

Answer 7

Virus/chronic bacterial infection

Question 8

If a parasite infection is present, what type of WBC will increase in number?

Answer 8

eosinophils

Question 9

What is a gram stain used for?

Answer 9

identifying species of bacteria

Question 10

Give an example of gram positive bacteria

Answer 10

Staphylococcus aureus

Question 11

Give an example of gram negative bacteria

Answer 11

E.Coli

Question 12

When is oil immersion used?

Answer 12

With the light microscope, usually to see bacteria

Question 13

What is the oil used to do?

Answer 13

Used to refract the light coming through the sample.

Question 14

What magnification does the oil immersion lens magnify at?

Answer 14

x100