To identify factors associated with uptake of HIV testing a questionnaire was given to patients attending a GUM clinic over a three-week period. One hundred and twenty (69.4%) of 189 patients accepted and 53 (30.6%) refused testing. Variables associated with having a HIV test were: being tested previously (P=0.045), given a leaflet about testing (P=0.001), told about the window period (P=0.006), told about availability of counselling (P=0.030), given insurance advice (P=0.014), and a past history of sexually transmitted infections (P=0.044). Most patients perceived a low risk of being HIV positive (n=143, 75.7%) with no difference between those accepting or declining testing. The principal reason for testing was a check-up, and for refusal was a lack of perceived risk. Patients who are well informed about HIV testing are more likely to accept a test.

1 The aim of the present study was to determine whether inhibition of cyclic nucleotide phosphodiesterase (PDE) modulates the stimulated generation of the cytokines, interleukin-4 (IL-4) and IL-13, from human basophils. This was addressed by evaluating the effects of both nonselective and selective inhibitors of PDEs on the generation of cytokines from basophils. 2 The nonselective PDE inhibitors, isobutyl-methylxanthine (IBMX) and theophylline, attenuated the IgE-mediated generation of IL-4 and IL-13 and, also, the release of histamine from basophils. 3 The effects of the isoform-selective inhibitors, 8-methoxymethyl-IBMX (PDE 1 inhibitor), siguazodan (PDE3 inhibitor), rolipram (PDE4 inhibitor), denbufylline (PDE4 inhibitor), Org 30029 (mixed PDE3 and 4 inhibitor) and zaprinast (PDE5 inhibitor), were studied. Of these selective compounds, only rolipram, denbufylline and Org 30029 inhibited the IgE-dependent generation of IL-4, IL-13 and histamine from basophils to a statistically significant (Po0.05) degree. 4 The effects of isoform-selective inhibitors on basophils activated by IL-3 were evaluated. The IL-3-induced generation of IL-4, IL-13 and histamine was inhibited to a statistically significant (Po0.05) extent, only by compounds that act as inhibitors of PDE4. 5 These data suggest that inhibition of PDE4 can regulate the generation of cytokines from human basophils.