oa South African Medical Journal - Sewage filter flies (psychoda) as a cause of bronchial asthma : a contribution to the study of insect allergy

Volume 20, Issue 2
  • ISSN : 0256-9574
  • E-ISSN: 2078-5135



The occurrence of the sewage filter fly (Psychoda) at sewage works and the characteristics of the fly are descriptionbed. Thirteen cases of bronchial asthma (2 Europeans and 11 Natives) suspected of being etiologically related to Psychoda sensitivity were investigated at a sewage works in the Transvaal.

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