Dataset Information

Infectious titres of human papillomaviruses (HPVs) in patient lesions, methodological considerations in evaluating HPV infectivity and implications for the efficacy of high-level disinfectants.

ABSTRACT:

Background

Recent publications from a single research group have suggested that aldehyde-based high-level disinfectants (HLDs), such as ortho-phthalaldehyde (OPA), are not effective at inactivating HPVs and that therefore, patients may be at risk of HPV infection from medical devices. These results could have significant public health consequences and therefore necessitated evaluation of their reproducibility and clinical relevance.

Methods

We developed methods and used standardised controls to: (1) quantify the infectious levels of clinically-sourced HPVs from patient lesions and compare them to laboratory-derived HPVs, (2) evaluate experimental factors that should be controlled to ensure consistent and reproducible infectivity measurements of different HPV genotypes, and (3) determine the efficacy of select HLDs.

Findings

A novel focus forming unit (FFU) infectivity assay demonstrated that exfoliates from patient anogenital lesions and respiratory papillomas yielded infectious HPV burdens up to 2.7 × 10³ FFU; therefore, using 2.2 × 10² to 1.0 × 10⁴ FFU of laboratory-derived HPVs in disinfection assays provides a relevant range for clinical exposures. RNase and neutralising antibody sensitivities were used to ensure valid infectivity measures of tissue-derived and recombinant HPV preparations. HPV infectivity was demonstrated over a dynamic range of 4-5 log₁₀; and disinfection with OPA and hypochlorite was achieved over 3 to >4 log₁₀ with multiple genotypes of tissue-derived and recombinant HPV isolates.

Interpretation

This work, along with a companion publication from an independent lab in this issue, address a major public health question by showing that HPVs are susceptible to HLDs.

Funding

Advanced Sterilization Products; US NIH (R01CA207368, U19AI084081, P30CA118100).

SUBMITTER: Ozbun MA

PROVIDER: S-EPMC7808919 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Publications

Infectious titres of human papillomaviruses (HPVs) in patient lesions, methodological considerations in evaluating HPV infectivity and implications for the efficacy of high-level disinfectants.

Ozbun Michelle A MA Bondu Virginie V Patterson Nicole A NA Sterk Rosa T RT Waxman Alan G AG Bennett Erica C EC McKee Rohini R Sharma Ankur A Yarwood Jeremy J Rogers Marc M Eichenbaum Gary G

EBioMedicine 20210107

<h4>Background</h4>Recent publications from a single research group have suggested that aldehyde-based high-level disinfectants (HLDs), such as ortho-phthalaldehyde (OPA), are not effective at inactivating HPVs and that therefore, patients may be at risk of HPV infection from medical devices. These results could have significant public health consequences and therefore necessitated evaluation of their reproducibility and clinical relevance.<h4>Methods</h4>We developed methods and used standardis ...[more]

PMID: 33422988

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Dataset Information

Infectious titres of human papillomaviruses (HPVs) in patient lesions, methodological considerations in evaluating HPV infectivity and implications for the efficacy of high-level disinfectants.

Background

Methods

Findings

Interpretation

Funding

Publications

Infectious titres of human papillomaviruses (HPVs) in patient lesions, methodological considerations in evaluating HPV infectivity and implications for the efficacy of high-level disinfectants.

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