Which one of the following statements about antibody gene rearrangement is correct?
Which one of the following statements about HLA molecules is correct?
The activation of T and B cells is the central process of the adaptive immune system. Which one of the statements below correctly describes features in the activation process which are shared by both T and B cells?
Which one of the statements below concerning antigen presenting cells is correct?
CD8 Cytotoxic T cells and Natural Killer (NK) cells possess several shared characteristics. Select the characteristic described below which is not shared by both cell types
Which one of the following statements about the pathogenesis of diseases caused by immune responses is incorrect?
Which one of the following statements below is regarding clonal anergy?
Which one of the following statements about immediate (Type I) hypersensitivity reactions is correct?
Which one of the following statements about mast cells is incorrect?
Which one of the following statements about vaccines is correct?
Tania Plotkin, a sixteen year old girl, was investigated for an immune deficiency
because of a history of recurrent infections.
On investigation, her levels of immunoglobulins and complement components
were normal. Assays for antibodies to vaccine antigens showed normal levels of
antibodies to these antigens. Her neutrophil numbers and function were also
Tania’s T cell numbers, as determined by measuring the number of cells
expressing CD3, were found to be normal. B cell numbers were also normal and
they expressed MHC Class II antigens. However, Tania’s lymphocytes and other
nucleated cells did not express MHC Class I antigens.
Which one of the following would be consistent with these laboratory data?
Which one of the following statements concerning increased vascular permeability associated with acute inflammation is incorrect?
Which one of the following statements concerning cells associated with acute inflammation is incorrect?
One of the currently licensed vaccines against Streptococcus pneumoniae which
is designed to induce protection against invasive pneumococcal disease is
prepared from chemical conjugates of pneumococcal surface polysaccharides
and a protein such as tetanus toxoid. Which one of the statements below
correctly describes the features of this vaccine?
A 17 year old girl presented to the emergency department of a teaching hospital
with a one day history of headache, fever and photophobia. She had previously
been well and had received all of her immunisations. CSF and blood cultures were
collected and IV cefotaxime was administered. 45 minutes later the laboratory
reported the following CSF results: 1140 leucocytes/μl (90% polymorphonuclear
leukocytes); protein 2.0g per litre (normal < 0.4g/l); glucose 1.7mmol/l (normal ≥
2.5 mmol/l); Gram negative diplococci seen on Gram stain; Latex agglutination
tests for H. influenzae type b and Neisseria meningitidis were negative.
On the basis of the test results, which one of the following infectious agents listed
below is the most likely cause of her condition?
When confronted with an angry patient, which one of the following is least likely to be correct?
When managing a tearful patient which statement is least likely to be correct?
When faced with a distressed family member, which statement is least likely to be correct?
Which one of the following changes will result in a significant fall in prevalence of gonorrhoea in a population with a high rate of gonorrhoea among heterosexuals?
Which one of the following is least effective in reducing the prevalence of STIs
(sexually transmissible infections)?
The number of secondary infections that arise from one infectious case of a
particular disease may be increased by which one of the following factors?
Which one of the following factors favours the eradication of an infectious
disease of humans?