پاورپوینت کتاب مبانی در میکروبیولوژی (مبانی میکروب شناسی)نویسنده Kathleen Park Talaro and Barry Chess

Foundations in
Microbiology
Sixth Edition

245اسلاید به زبان اصلی(انگلیسی) همراه باتصاویر

General Characteristics of the Staphylococci

•Common inhabitant of the skin and mucous membranes

•Spherical cells arranged in irregular clusters

•Gram-positive

•Lack spores and flagella

•May have capsules

•45 species

Staphylococcus aureus

•Grows in large, round, opaque colonies

•Optimum temperature of 37oC

•Facultative anaerobe

•Withstands high salt, extremes in pH, and high temperatures

•Carried in nasopharynx and skin

•Produces many virulence factors

Virulence factors of S. aureus

Enzymes:

•Coagulase – coagulates plasma and blood; produced by 97% of human isolates; diagnostic

•Hyaluronidase – digests connective tissue

•Staphylokinase – digests blood clots

•DNase – digests DNA

•Lipases – digest oils; enhances colonization on skin

•Penicillinase – inactivates penicillin

دانلود انواع فایل و مقاله آموزشی