DMF Week 6 SAQ

1

Which of the following statements concerning acute inflammatory exudates is not correct?


2

Which of the following statements concerning epithelioid macrophages is not correct?


3

Which one or more of the following statements about viruses is correct?

A: Viruses have an envelope which protects their nucleic acid from degradation.

B: The presence of a viral envelope makes the virus less suscepticle to disinfectants

C: The presence of a viral envelope makes the virus less susceptible to antibody and complement lysis

D: Viruses must bind to one or more specific receptors on the host cell in order to invade the cell, and this process can be blocked by specific antibodies.

E: Binding of the virus to its specific host cell receptor invariably leads to viral uptake by endocytosis.


4

Which one of the statements regarding measures to provide active or passive immunity of short term (2 – 3 months duration) or long term (many years duration) against infectious diseases is correct?


5

The Hib vaccine is a conjugated vaccine provided for use in young children whose use has resulted in a remarkable decline in childhood infection due to Haemophilus influenzae. Which one of the following statements regarding this vaccine is correct?


6

Baby S.T. is three days old and is in the neonatal unit, having been born at 32 weeks gestation after a prolonged labour. She weighs 2.1kg. She has become irritable, is feeding poorly and has become hypoxic. A paediatrician collects blood and CSF for culture.

The organism grown from blood cultures is a Gram positive coccus, which grows on Horse Blood agar as a small beta-haemolytic colony.

On the basis of the above results, which one of the organisms listed below is a likely cause of this baby’s illness?


7

A seven year old boy presents with symptoms suggestive of meningitis, and a lumbar puncture is performed. The Gram stain shows the presence of large numbers of Gram negative diplococci. Which one of the organisms below is the likely cause of the patient's condition?