MMI133 Lecture Notes - Lecture 14: Tetanospasmin, Human Microbiota, Lactobacillus

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Describe the differences between normal flora and transient flora. Describe different types of infections including nosocomial infections. List hazards you face as a health care professional. Animals and humans are free of microbes in utero, in healthy situation acquire bacteria at and after birth. Newborns first contact with bacteria is usually lactobacilli from mother"s vagina. With breastfeeding and exposure to the environment, foods and people other types of organisms are able to colonize their skin and intestinal tracts. Bacteroides: anaerobic gram neg rod: most dominant in gi tract, not e. coli. Lactobacilli: dominant in pre-menopausal women (breaks down glycogen low ph) More gram neg in genitals; ie depends on where on skin you are examining. Microorganisms that may be present on body surfaces temporarily (days, weeks or months), then disappear might be pathogenic; what we remove. Can be either pathogenic (disease causing) or nonpathogenic. Do not necessarily cause disease unless special conditions prevail.

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