DISTINCTIVE PROPERTI19 - serotype 1 • The Legionella cell...

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DISTINCTIVE PROPERTIES: Legionella are motile, catalase-positive, Gram-negative bacilli. Some strains produce a yellow fluorescence under 366 nm ultraviolet light. Most are fastidious, requiring iron and L-cysteine for growth. There are 25 species of Legionella and 42 serogroups. Most (85%) clinical isolates are L. pneumophila
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Unformatted text preview: serotype 1. • The Legionella cell wall is mostly diaminopimelic acid (DAP) and contains little peptidoglycan. The LPS appears to lack the endotoxic lipid A moiety. • Several species produce hemolysins and there are some reports of exotoxins. • Legionella are capable of intracellular (macrophage) multiplication....
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