Contact urticaria and anaphylaxis to the fungicide chlorothalonil

Cutis. 1993 Nov;52(5):312-5.


Chlorothalonil, a common fungicide used for agricultural and horticultural purposes is capable of eliciting contact urticaria. In our patient, an anaphylactoid reaction resulted from intact skin contact to diluted chlorothalonil (0.01 percent aqueous). Our patient also experienced immediate respiratory reactions such as a tight chest and throat after entering the nursery greenhouse, without direct skin contact with chlorothalonil.

Publication types

  • Case Reports

MeSH terms

  • Anaphylaxis / chemically induced*
  • Anaphylaxis / diagnosis
  • Dermatitis, Occupational / etiology*
  • Female
  • Fungicides, Industrial / adverse effects*
  • Humans
  • Middle Aged
  • Nitriles / adverse effects*
  • Patch Tests
  • Urticaria / chemically induced*
  • Urticaria / diagnosis


  • Fungicides, Industrial
  • Nitriles
  • tetrachloroisophthalonitrile