Key result
The addition of specific electrolytes to acidic solutions enhanced the inactivation of HSV-1, HSV-2, and influenza A virus in a virus-dependent and concentration-dependent manner, whereas poliovirus remained resistant.
Certain combinations of electrolytes and low pH can exert more effective, virus-specific inactivation, which may be useful for designing acidic solvents for surface disinfection.
May aid virus-specific disinfectant design; leaves open clinical translation pending validation studies.
Acidic pH is frequently used to inactivate viruses. We have previously shown that arginine synergizes with low pH in enhancing virus inactivation. Considering a potential application of the acid inactivation of viruses for the prevention and treatment of superficial virus infection at body surfaces and fixtures, herein we have examined the effects of various electrolytes on the acid-induced inactivation of the herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2), the influenza A virus (IAV) and the poliovirus upon their incubation at 30˚C for 5 min. Eight electrolytes, i.e., phosphate, NaCl, glutamate, aspartate, pyrrolidone carboxylate, citrate, malate and acetate were tested. No detectable inactivation of the poliovirus was observed under the conditions examined, reflecting its acid-resistance. HSV-1 and HSV-2 responded similarly to the acid-treatment and electrolytes. Some electrolytes showed a stronger virus inactivation than others at a given pH and concentration. The effects of the electrolytes were virus-dependent, as IAV responded differently from HSV-1 and HSV-2 to these electrolytes, indicating that certain combinations of the electrolytes and a low pH can exert a more effective virus inactivation than other combinations and that their effects are virus-specific. These results should be useful in designing acidic solvents for the inactivation of viruses at various surfaces.
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Koyama (2011) studied Virus inactivation (HSV-1, HSV-2, Influenza A, Poliovirus). Electrolytes in acidic solutions vs. PBS or acid alone was evaluated on Virus inactivation (reduction in relative infectivity). The addition of specific electrolytes to acidic solutions enhanced the inactivation of HSV-1, HSV-2, and influenza A virus in a virus-dependent and concentration-dependent manner, whereas poliovirus remained resistant.
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