Legionellosis
Legionellosis is a collective term describing infection produced by Legionella spp., whereas Legionnaires disease is a multi-system illness with pneumonia. The clinical and epidemiologic aspects of these diseases (Table 1) are discussed extensively in another guideline. Although Legionnaires disease is a respiratory infection, infection-control measures intended to prevent healthcare-associated cases center on the quality of water—the principal reservoir for Legionella spp. Table 1. Clinical and epidemiologic characteristics of legionellosis/Legionnaires disease

a. temperatures of 77°F–107.6°F [25°C–42°C],
b. stagnation,
c. scale and sediment, and
d. presence of certain free-living aquatic amoebae that can support intracellular growth of legionellae.
The bacteria multiply within single-cell protozoa in the environment and within alveolar macrophages in humans.
Tuesday, April 26. 2022
Refrences
Please Check out file at the following link
Modes of Transmission of Waterborne Diseases
Principles of Cleaning and Disinfecting Environmental Surfaces
Heating, Ventilation, and Air Conditioning Systems in Health-Care Facilities