Anhydrobiotic organisms are well known for their resistance to extreme environmental conditions while in the inactive, ametabolic, state. Our study confirms that this resistance also transfers to treatments with the fumigant methyl bromide. We found alive specimens of nematodes, rotifers and tardigrades after 70 h treatment with methyl bromide. Quantitative estimates of survival in the eutardigrade Richtersius coronifer revealed no difference between treated and untreated samples which had been kept dry for similar times. However, R. coronifer from samples collected 11 months before treatment had lower survival compared to samples collected shortly before the treatment. The fact that anhydrobiotic organisms escape treatments with biocides should be considered a serious problem, both for the food industry and from the perspective of human mediated spread of organisms.
Effects of methyl bromide fumigation on anhydrobiotic micrometazoans / Jonsson, K. I.; Guidetti, Roberto. - In: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY. - ISSN 0147-6513. - STAMPA. - 50:(2001), pp. 72-75. [10.1006/eesa.2001.2090]
Effects of methyl bromide fumigation on anhydrobiotic micrometazoans
GUIDETTI, Roberto
2001
Abstract
Anhydrobiotic organisms are well known for their resistance to extreme environmental conditions while in the inactive, ametabolic, state. Our study confirms that this resistance also transfers to treatments with the fumigant methyl bromide. We found alive specimens of nematodes, rotifers and tardigrades after 70 h treatment with methyl bromide. Quantitative estimates of survival in the eutardigrade Richtersius coronifer revealed no difference between treated and untreated samples which had been kept dry for similar times. However, R. coronifer from samples collected 11 months before treatment had lower survival compared to samples collected shortly before the treatment. The fact that anhydrobiotic organisms escape treatments with biocides should be considered a serious problem, both for the food industry and from the perspective of human mediated spread of organisms.
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