Which one or more of the following statements is correct?
The transcutaneous route of viral infection of humans is exemplified by:
A - papilloma viruses which enter the skin via abrasions
B - hepatitis A virus which enters via use of contaminated needles
C - hepatitis B virus which can enter via body piercing and tattooing
D - dengue virus which is spread by the bite of a racoon
Which one or moreof the following statements about interferons is correct?
A - Interferons are of type I and type II which bind to the same receptor
B - Type II interferons (IFNgamma) are produced by T cells and NK cells
C - Type I interferons (IFNalpha and beta) are produced by NK cells
D - Type I interferons (IFNalpha and beta) activate NK cells
Which one of the following statements about the ability of viruses to cause damage to host cells and thus disease is incorrect?
Which one of the following statements about the herpes virus family is incorrect?
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. Which one or more of the organisms listed below is a likely cause of this baby’s illness?
A - Streptococcus agalactiae
B - Listeria monocytogenes
C - E. coli
D - Neisseria meningitidis
The organism grown from blood cultures is a Gram negative bacillus, which grows on MacConkey agar as a large (2 – 3mm diameter) lactose fermenting colony.
On the basis of the above results, which one of the organisms listed below is a likely cause of this baby’s illness?
Which one of the statements below regarding the agents which cause congenital and perinatal infections is correct?