ArticleInfection and drug resistance2025
Investigation into the Efficacy of Formic Acid Fumigation for Inactivating Clinically Isolated Filamentous Fungi.
Article in Infection and drug resistance, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: Inactivating filamentous fungi (molds) reduce toxin production and transmission. This study evaluated the efficacy of formic acid (FA) fumigation to identify optimal conditions and its effects on fungal morphology. We aim to develop an efficient inactivation protocol for molds and provide valuable insights into laboratory techniques for fungal inactivation. Methods: Initially, 238 clinical isolates from 23 species of molds were evaluated for the inactivation efficacy of formic acid, formaldehyde, and peracetic acid. After identifying the optimal sterilizing agent, 188 isolates from 16 clinically significant species were tested. Four concentrations (30%, 50%, 70%, and 100%) and six-time intervals (4 to 14 hours) were tested to optimize fumigation conditions. Morphological changes were analyzed using Results: The inactivation rates of 238 molds fumigated with formic acid, formaldehyde, and peracetic acid for 24 hours were 99.16%, 89.08%, and 90.35% ( Conclusion: Formic acid demonstrated superior inactivation efficacy compared to formaldehyde and peracetic acid. At a concentration of 70% and a fumigation duration of 12 hours, the inactivation of molds was most effective.
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