Recovery of Airborne Streptococcal L-Forms at Various Relative Humidities

Large amounts of airborne microorganisms are emitted from livestock production. These emitted microorganisms may associate with dust, and are suspected to pose a risk of airborne infection to humans in vicinity and to animals on other farms. However, the extent to which airborne transmission may play a role in the epidemic, and how dust acts as a carrier of microorganisms in the transmission processes is unknown. The authors present the current knowledge of the entire process of airborne transmission of microorganisms-from suspension and transportation until deposition and infection-and their relation to dust. The sampling and the mitigation techniques of airborne microorganisms and dust in livestock production systems are introduced as well.Airborne Microorganisms and Dust in Livestock Houses 1073 airborne microorganisms and dust from livestock production systems, as well as the factors affecting their concentrations. In section 3, the physical and biological decay of airborne microorganisms and dust during transmission is described. In section 4, the deposition of airborne microorganisms and dust in respiratory tracts, and the infective dose of pathogenic microorganisms to animals are introduced. In section 5, the strategies and techniques for sampling microorganisms and dust in livestock production systems are proposed. In section 6, the mitigation techniques are described.

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Recovery of Airborne Streptococcal L-Forms at Various Relative Humidities

Abstract: Aerosolized group A streptococcal L-forms survived better at low than at high relative humidities, and mid-range humidities were the most lethal. Colonial morphology of cells surviving aerosolization was not altered.

Cited by 4 publications

References 5 publications

Basic concepts in microbial aerosols

Basic concepts in microbial aerosols

The impact of incubating the throat culture for 72h on the diagnosis of group A beta-hemolytic streptococci

Airborne Microorganisms From Livestock Production Systems and Their Relation to Dust

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