Kennel Disinfectants for Microsporum canis and Trichophyton sp.

Karen A Moriello

doi:10.1155/2015/853937

Abstract

The antifungal efficacy of commonly used kennel disinfectants for large surfaces was tested using naturally infective material from untreated animals (M. canis and Trichophyton sp.) soaked and macerated but unfiltered leaving visible fluorescing hairs and/or scales in the test inoculum to create a robust challenge. Disinfectants included sodium hypochlorite (1 : 32 and 1 : 100), enilconazole (1 : 100), accelerated hydrogen peroxide (1 : 16), potassium peroxymonosulfate (1% and 2%), and calcium hypochlorite “dry bleach.” Disinfectants were tested at a 1 : 10, 1 : 5, and 1 : 1 dilution of test inoculum to disinfectant with a 10 min contact time. Good efficacy was defined as a disinfectant resulting in no growth. Control plates grew >300 colonies of each pathogen per plate. Enilconazole, sodium hypochlorite (all dilutions), accelerated hydrogen peroxide, and 2% potassium peroxymonosulfate (but not 1%) inhibited all growth of both pathogens at 1 : 10, 1 : 5, and 1 : 1 dilutions. Calcium hypochlorite showed no antifungal efficacy (>300 colonies per plate). Enilconazole (1 : 100), sodium hypochlorite (1 : 32 or 1 : 100), accelerated hydrogen peroxide (1 : 16), and 2% potassium peroxymonosulfate are recommended for decontamination of kennels exposed to dermatophyte pathogens.

Highlights

Environmental disinfection is an important component of the prevention and control of dermatophytosis and is of particular importance in facilities housing large numbers of animals
Sodium hypochlorite is a commonly used disinfectant in multianimal facilities, there is increasing interest in using compounds that are inexpensive, easier to use, and less corrosive to cages. One of these compounds is calcium hypochlorite, referred to as “dry bleach” because it is supplied in pellets and packages
The objective of this study was to determine the antifungal efficacy of six kennel disinfectants against a robust challenge of naturally infective material

Summary

Introduction

Environmental disinfection is an important component of the prevention and control of dermatophytosis and is of particular importance in facilities housing large numbers of animals (e.g., animal shelters, boarding kennels, etc.). Sodium hypochlorite is a commonly used disinfectant in multianimal facilities, there is increasing interest in using compounds that are inexpensive, easier to use, and less corrosive to cages. One of these compounds is calcium hypochlorite, referred to as “dry bleach” because it is supplied in pellets and packages. This compound is most commonly used to disinfect foods, swimming pools, and water supplies [1,2,3] It is used in over-the-counter bathroom cleaners and disinfectants and to kill moss and algae. It is an increasingly popular kennel disinfectant because it is automatically diluted and dispensed using a water house, is inexpensive, and is not very corrosive [4]

Objectives

Methods

Results