By Edward J. Bottone

Full of hugely educational visible pictures, An Atlas of the medical Microbiology of Infectious ailments, quantity 1: Bacterial brokers comprises ordinary and ordinary shows and settling on features of microorganisms, together with newly defined microbial brokers, protecting the breadth of scientific microbiology. The booklet offers greater than 425 colour photomicrographs harvested over the author's 40-year profession augmented through up to date textual content describing every one microbial entity incorporated and delivering insightful reviews on their scientific importance.

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Qxd 12/22/07 11:24 AM Page 37 ACID-FAST BACILLI: MYCOBACTERIUM pigmented, although a rare yellow-pigmented colony form may be encountered. Two colony morphotypes, rough and smooth, are especially evident on serumbased media such as Middlebrook 7H10 and 7H11 agar. Mycobacterium kansasii This species is photochromogenic, producing bright yellow colonies upon exposure to light. M. kansasii is found in tap water and has caused pulmonary, cervical lymphadenitis (especially in children), cutaneous, and disseminated infections.

Because of the reduction in the chain length of their cell wall fatty acid composition, these species not only grow more rapidly, but stain weakly Gram-positive and hence can mimic Corynebacterium species (diphtheroids). Figure 126 Mycobacterium fortuitum Ulcerated lesion of leg with sinus tracts which developed post-cosmetic fat transplant to leg. qxd 12/22/07 11:24 AM Page 41 ACID-FAST BACILLI: MYCOBACTERIUM Figure 130 Mycobacterium chelonei Abscess of leg with necrotic borders and surrounding erythema in immunocompetent administrative assistant.

Qxd 12/22/07 11:57 AM Page 57 FERMENTING, GRAM-NEGATIVE, FACULTATIVE ANAEROBIC BACILLI Y. pestis. Flea transmission or contact with infected tissue results in bubonic plague and airborne transmission results in pneumonic plague which is highly fatal. Bubonic plague is characterized by the formation of abscesses (buboes) in the lymph nodes closest to a flea bite. Bacteremia may occur with secondary spread to the lungs causing pneumonia. Virulence of yersiniae is associated with both chromosomal and phage-encoded gene products, many of which are expressed at different temperatures depending on the environment encountered, inanimate (food, water), vector (fleas), human or animal hosts.

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