1. SERUM GLUFOSINATE LEVEL PREDICTS SEVERITY OF POISONING CAUSED BY THE INGESTION OF A HERBICIDE CONTAINING GLUFOSINATE
- Author
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Koyama, K, Hirose, Y, Tase, C, Kohriyama, K, Ohashi, N, Goto, K, Okuda, T, Akuzawa, H, and Kohda, Y
- Subjects
Self-poisoning -- Demographic aspects ,Herbicides -- Health aspects ,Central nervous system -- Physiological aspects ,Environmental issues ,Health ,Pharmaceuticals and cosmetics industries - Abstract
Objectives: The suicidal ingestion of a herbicide BASTA[R] containing 20% glufosinate ammonium and 33% anionic surfactant is increasing in Japan. This herbicide is used over 80 countries, including Canada and USA where recombinant plants resistant to glufosinate are cultivated. In 1998, a severe case of BASTA[R] ingestion was recorded in Canada. BASTA[R] produces central nervous system (CNS) signs, such as coma, apnea, and generalized convulsions, with a latent period of 8-38 hours.[1] Though, patients look asymptomatic during the latent period, they deteriorate unexpectedly. If we can predict the severity during the latent period, the treatment will be more safe and effective. Because the CNS signs are considered to be due essentially to glufosinate,[2] we studied the relationship between the serum glufosinate level ([GLF]s) and severe CNS signs. Method: We collected cases of acute BASTA[R] poisoning, referring to MEDLINE and Japana Centra Revuo Medicina, and records of the Japan Poison Information Center. From 1990 to May 1999, we found 74 cases of acute BASTA[R] poisoning where [GLF]s on admission was measured. The severe cases were defined as those who developed at least one of the following signs: coma, apnea, and generalized convulsions that are common and need life-saving respiratory management. Patients who developed none of these signs were defined as non-severe. Results: We obtained 42 severe cases (male 16, female 26; 22-86 year-old), and 32 non-severe cases (male 21, female 11; 20-86 year-old). When [GLF]s on admission was plotted semi-logarithmically related to the time from ingestion, severe cases were located higher than non-severe cases. Above the A-line, connecting 200 ppm at 2 hours and 15 ppm at 8 hours, all cases were severe. Below the B-line, connecting 70 ppm at 2 hours and 5 ppm at 8 hours, all cases were non-severe. Between A-line and B-line, 50% (6/12) were severe cases. Eighty percent of cases were above the A-line or below the B-line. Conclusion: [GLF]s on admission had a close relation to the development of severe CNS signs in acute BASTA[R] poisoning. Measurement of [GLF]s on admission by HPLC, which needs only 2-3 hours[3], may be valuable in the treatment of acute BASTA[R] poisoning. References: [1] Oxford Textbook of Critical Care. Oxford University Press 1999:657-659.[2] Koyami K. Glufosinate and a surfactant: which component produces effects on the central nervous system in acute oral BASTA poisoning? Vet Hum Toxicol 1999;41:341.[3] Bunseki Kagaku 1997; 46:66-74. Koyama K, Hirose Y, Tase C, Kohriyama K, Ohashi N, Goto K, Okuda T, Akuzawa H, Kohda Y, Goto K. Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575 Japan; Japan Poison Information Center, Suita, Osaka, 565-0871 Japan
- Published
- 2000