Bacteria

Streptococcus pyogenes -gram (+) cocci strip, catalase (-)-M-protien-inactivates compliment-streptolysin O-beta hemolytic-ASO antibodies cross react for rheumatic fever-Bacitracin sensitive-spreads (staph does not)-pyrogenic exotoxin-super antigen->scarlet fever and shock-scarlet fever-strawberry tongue, sand paper rash-Rheumatic fever->fever, myocarditis, joint sweeling->cross

Continue reading »

Bacteria

Streptococcus pyogenes Bio: Gram (+); Catalase (-); B-hemolytic;bacitracin sensitive Virulence: M protein; Streptolysins S and O; Pyrogenic exotoxins (superantigen); streptokinase; Lipoteichoic acid   Pathology:  Spread by respiratory droplets (upper resp); Pharyngitis; Scarlet fever rash; Skin

Continue reading »

Bacteria

associated with gastritis, duodenitis, and peptic and duodenal ulcers.   Gram-negative, highly motile, oxidase-positive, strongly curved bacterium.  microaerophilic, produces large amounts of urease   H. pylori is found within the mucus layer overlying the gastric

Continue reading »

Bacteria

Streptococcus pneumoniae Gram (+) diplococci, alpha-hemolytic, opt sensitive, capsular, catalase (-) Disease: 1. Causes 60% of pneumonia cases2. Most common cause of meningitis in adults (over 30 years) Vaccine: polyvalent and conjugated Moraxella catarrhalis Typical

Continue reading »

Bacteria tables

Folliculitis Staphylococcus aureus   -Infection of hair follicle -Stye-Infected eyelash -FURUNCLE-pus surrounded by inflamed tissue Erypsipelas Staphylococcus pyogenes   -Endogenous infection leads to sepsis -Infects dermal layer of skin -Preceded by strep throat Pseudomonas Dermatitis

Continue reading »

Chapters 25, 26 & 28

Staphylococcus aureus Causes: Skin and Wound infections (Direct contact) Food Poisoning (Indirect contact) Nosocomial Infections (Direct or indirect contact) Toxic Shock Syndrome (Tampons or surgical procedure) Streptococcus pyogenes Causes: Scarlet Fever (Inhalation of respiratory droplets)

Continue reading »

Bacteria II

Bordetella erythromycin and clarithromycin; DPT vaccine: inactivated pertussis toxin, filamentous hemagglutin, and pertactin; primary then booster NG  Pen no longer drug of choice: rise in MIC, plasmid-encoded beta-lactamase production, and chromosomally-mediated resistance Ceftriaxone or

Continue reading »

Bacteria II

Bordetella o clinical presentationDuring paroxysmal phase: leukocytosis (>50000 cells/μL, normal is 4500-11000); nasopharyngeal swab: gram stain may be difficult because low number of organisms; culture: bordet-genou media (within 3 – 7 days; serological: direct fluorescent

Continue reading »

Bacteria II

Bordetella (Catarral) Nasal drainage, sneezing, low-grade fever, occasional coughing; 1-2 weeks; most communicable Bordetella (paroxysmal stage) 2-4 weeks, up to 50 paroxysms a day; 10-20 abrupt rapid coughs with inability to breath between = whooping

Continue reading »