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. 1974 Mar;117(3):960–964. doi: 10.1128/jb.117.3.960-964.1974

Lethal and Mutagenic Action of Black Light (325 to 400 nm) on Haemophilus influenzae in the Presence of Air

Emiliano Cabrera-Juarez 1, Mercedes Espinosa-Lara 1
PMCID: PMC246572  PMID: 4544359

Abstract

Near-ultraviolet (UV) light (325 to 400 nm), in the presence of air and the absence of exogenous photosensitizing compounds, is lethal and mutagenic for Haemophilus influenzae. The lethal effect is the same for both wild type and streptomycin-resistant mutants, indicating that the mutants are not selected by the irradiation. The inactivation and mutagenicity show a large shoulder, suggesting the existence of repair systems. Filters were used to eliminate the possibility of short-UV irradiation. The effective radiation is between 325 to 400 nm. The lethal and mutagenic effects are higher during mid and late log phase than during early log or stationary phase.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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