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Summary A survey of the incidence of allergy in the entire population of a new‐town general practice is reported, comparing the year 1974 with 1979. A rise in the incidence of allergic complaints is noted in both sexes. However, hay fever and asthma continue to show a male dominance.

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Gut permeability has been studied in patients with either food intolerance or abnormal gut fermentation as well as in normal subjects. Permeability was measured by polyethylene glycol absorption, and the reasons for this choice of probe are discussed. Results show that both symptomatic groups have statistically very highly significant deviations from the normal (pv0.01), consisting of over-absorption, significant at molecular weights 242, 286, 330 and 374. Whilst both study groups were different from the normal they were not different from each other. The implications for these findings in the diagnosis and management of food intolerance and abnormal gut fermentation are discussed.

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Summary Houses were surveyed by dust sampling to examine the occurrence and significance of storage mites in rural areas in the U.K. As a part of this project pets’beds were sampled, and it was discovered that not only do they contain storage mites, but that in nearly all instances the classical housedust mite (D. pteronyssinus) was present in significant numbers.

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