Have a look at this agar plate below and answer the questions: (for bacteriologists only)
1) What is this test called and why?
2) Given that the horizontal streak is Staphylococcus aureus, what organism is likely to be represented by the “arrow” pointing towards it?
3) What other bacterium can cause a similar phenomenen?
4) How useful is this test likely to be in the future?
Click here for the answers with brief explanations
Have a look at this stain on a sputum sample and answer the questions below:
i) What type of stain is demonstrated?
ii) What is the initial dye used in such a stain called?, and what is used to “decolourise””this dye?
iii) What is the possible diagnosis?
iv) What other type of stain can be used to make the potential diagnosis?
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Have a look at this wet film from a stool sample:
1) What parasites can you identify?
2) Are there any parasites in there which are difficult to diagnose definitively?
3) What abnormalities might you expect on the Full Blood Count?
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Michael