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10 Cards in this Set
- Front
- Back
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1. Bacterial Disease Classified by? 2. Physiological Properties: a. catalase b. oxidase c. peroxidase |
1. Airborne, Foodborne, Waterborne, Soilborne, Arthropodborne, Physical contact (STD, contact, animal) a. Hydrogen peroxide > water b. Water > hydrogen peroxide c. Breakdown peroxidase - caused by tissue damage |
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Staphylococcus aureus (S. aureus) 1. Enzymes: C,H,S,D,L,P 2. Toxins: H,L,E,E,T |
- Gram positive, capsule, anaerobe, extreme salts, pH, and temp 1. Coagulase-coagulates blood / Hyaluronidase-promote invasion / Staphylokinase-digests blood clots / Dnase-digests DNA / Lipases-bacteria colonize(oily skin) / Penicillinase-inactivates penicillin 2. Hemolysins-Lyse RBC's / Leukocidin-Lyses neutrophils & macrophages / Enterotoxins-Act in GI tract / Toxic Shock Syndrome |
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1. Staphylococcal Disease - 1 a. (F,F,C,I) 2. Staphylococcal Disease - 2 b. (O,B,E) |
1. Localized cutaneous infections invade thru skin a. Folliculitis-inflammation of hair follicle > Furuncle-boil > Carbuncle-cluster of furuncles Impetigo-bubble like swelling break and peel away (newborns) 2. Systemic infections (into bone) b. Osteomyelitis-infection in metaphysis forms abscess > Bacteremia-bacteria from another infected site > Endocarditis - into blood steam to heart |
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1. Staphylococcal Disease - 3 (3) Toxigenic diseases 2. S. Epidermidis |
1. ) a. food intoxication - (heat enterotoxins) GI distress b. Staphylococcal scalded skin syndrome - Blisters then skin falls off c. TSS - toxemia - shock - organ failure 2. lives on skin and membranes, endocarditis, bacteremia, UTI |
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Catalase vs Coagulase Testing |
Catalase + = Staph / - = Strep Coagulase + = S. aureus / - = all other Staph |
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Streptococci 1. (2) Classification Systems |
- Gram +, long chains, can form capsules, facultative anaerobe, sensitive to drying and disinfectants 1. Lancefield - based of cell wall anagens (surface marker indicator) Hemolysis - ability to break down RBC Alph = Complete breakdown Beta = Partial breakdown Gamma = No breakdown |
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Streptococci Skin/Throat Infections: 1. Impetigo 2. Erysipelas 3. Streptococcal pharyngitis |
1. Superficial Lensions, highly contagious - insects, poor hygiene, crowded living 2. Enters thru breaks in skin, can be superficial or become systemic 3. strep throat |
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S. pyogenes 1. Virulence Factors a. Surface antigens 1. C-carbohydrates 2. Fimbriae 3. M-protein b. Extracellular toxins 1. Streptolysins 2. Erythrogenic toxin 3. Superantigens |
- Flesh eating bacteria, Group "A" Strep, produces toxins, humans only, most serious, Causes impetigo or strep or pharyngitis a. 1.) protect against lysozymes degrading cells 2.) adherence / 3.) contributes resistance to phagocytosis b. 1.) hemolysins - cause cells and tissue injury 2.) red rash 3.) strong monocyte and lymphocyte stimulants, degrading different tissues |
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S. agalactiae |
- Group "B", can be normal flora, resides in vagina and lg intestines, passed on thru birth |
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Typical Pneumonia |
- Caused by several bacteria, most caused by Streptococcus pneumoniae not all |
