Asthma caused by diptera and hemiptera


Occupations
  • Animal foodstuffs industry
  • Laboratory staff
  • Service Personnel
  • Manure spreader
  • Sewage worker
Agents
Punaise, Chironomid midges, Drosophila melanogaster, Echynodorus plasmosus, Fly, Fruit fly, Lucinia cuprina, Meat fly, Mosquito larvae, Psychoda alternata, Sewage fly.
 
Incidence
Incidence: Significant amongst exposed subjects, in particular in breeders of exotic fish. IgE type allergy. The allergen is present in the whole body of the animal (adult or larva). Debris and dust from the breeding areas may also contain the allergen.
 
Conditions
Sensitization of subjects who work in laboratories which breed insects, in fish food manufacture (mosquito larvae) or in anglers using them as bait. Sensitization is associated with humid environments. Both the larvae and adult insects represent sources of allergens. In the case of chironomid midges, the principle allergen is Chi t 1. Some people react to other antigenic fractions which may show cross-reactivity with other insects or crustacea.
 
Symptoms
Rhinitis and asthma linked to work.
 
Diagnostic methods
IDR using available extracts depending on the case: Debris and dust from breeding areas and/or extracts from the animal 10-6, 10-5 and 10-4 m/v. Immunological dosage. RAST/CAP RAST mosquito and fly. Bronchial provocation test (in hospital). Specific IgE available for chronomids: CAP, RAST

References

  1. Invest. Allergol. Clin. Immunol. 1999,9:117 - Gaundo P.A. et al.
  2. J. Allergy Clin. Immunol.1997,99:267 Garcia Làzaro M.A.
  3. Int. Arch. Allergy Immunol. 1995,106:271
  4. J. Allergy Clin. Immunol. 1994, 93:424
  5. J. Allergy Clin. Immunol. 1986,77:108
  6. Clin. Allergy 1986,16:65
  7. Am. Rev. Resp. Dis. 1985,131:949
  8. Med. Del. Lavoro 1982,3:234

As in all diagnostic testing, the diagnosis is made by the physican based on both test results and the patient history.