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2010274032 김현욱 / 자료조사, Quiz 2013274012 김은기 / PPT제작 2013274013 한지수 / 자료조사, Quiz 2013274039 김민지 / 자료조사, Quiz 2013274054 강유경 / 발표
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Gram (-) facultative anaerobes Comma-shaped rods Capsule, spore (X) Oxidase(+), urease(-), Catalase(+) 18~38℃, pH 6~9 O antigen, H antigen 0.5~3% NaCl 필요 (Halophilic) Marine vibrio Polar flagella
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Epidemic cholera or Asiatic cholera Free living in endemic regions Influence by climate : Warm, Alkaline, Saline condition El Tor biotype Outbreak in several part
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Cholera toxin (CT) – Disrupt the normal physiology of intestinal cell
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primary symptoms - Secretary diarrhea(‘rice-water stool’) - Vomiting - Loss of blood volume - Acidosis - Potassium depletion Secondary symptoms - Hypotension, tachycardia, cyanosis, collapse from shock within 18-24 hour If untreated, death less than 48 hours (mortality rate: 55%)
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Epidemiologic studies Isolate & Identify from stool sample Dark-field microscopy - Curved cells with brisk darting motility Immobilization or fluorescent staining by group specific antisera
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Prompt replacement of water & electrolyte - ORT(oral rehydration therapy) - Intravenous replenishment oral antibody - Tetracycline Trimethoprimsulfa(지사제)
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Proper sewage disposal Water purification Vaccine for traveler in endemic region
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Acute form of gastroenteritis Eaten raw, partially cooked, poorly stored seafood squid, mackerel, sardines, crabs, tuna, shrimp, oysters, clams Coastal regions - during the summer & early fall Incubation period 24hours explosive, watery diarrhea, nausea, vomiting, abdominal pain, fever
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Ingesting raw oysters Patient with diabetes or liver disease cause death from food-borne illness Fluid & electrolyte replacement, antibiotics Continuous Refrigeration Sufficient cooking temperature
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contaminated beverages and food, especially water, milk, meat, and chicken
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adhere mucosa at the last segment of the small intestine (ileum) → burrow through the mucosa → taken in by intestinal cell
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CJT (Campylobacter jejuni enterotoxin) - heat labile enterotoxin → Diarrhea like cholera
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Isolation from fecal sample, blood sample Dark-field examination with feces -> curved rods and motility (rapid presumptive diagnosis) C.jejuni : microaerophilic -> selective agar
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gastroenteritis fever, diarrhea, abdominal pain, bloody or watery diarrhea lasts about 1 week and is self-limiting Sequela: neurological disease called Guillain-Barr'e syndrome
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Nonspecific rehydration therapy, electrolyte balance erythromycin, tetracycline, aminoglycosides, quinolones - severely affected patients vaccines are yet to be developed proper sanitary control of water and milk supplies care in food harvesting and preparation
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sexually transmitted disease of sheep, cattle, goats -> abortion debilitated person or women late in pregnancy -> opportunistic pathogen meningitis, pneumonia, arthritis, septicemic infection in the newborn, sexually transmitted proctitis in adults cephalothin sensitivity
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in oral cavity Catalase (-) Diarrhea
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Gram-negative Spiral and Curved rods Microaerophilic Oxidative Several polar flagella - Motile Grow in human stomach (acidic environment) Urease (+)
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1979, first detected -> 2005, Nobel Prize Half of the people in the world -> infected Transmitted from person to person by house flies (oral-oral or oral-fecal route) Acquired early in life -> carried asymptomatically Higher rate of ulcer in blood type ‘O’ -receptor specific for helicobacter is the same receptor as type O blood
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Formation of urease : urea -> ammonium & bicarbonate(alkaline) -neutralize stomach acid Immune evasion (not effective immune reaction) proliferate germs + increase pathogenicity
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urease test urea breath test (urea -> radioactive CO2) PCR for microbial DNA in biopsies and feces hp-fast test
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Tagamet Clarithromycine with stomach acid inhibitors (2-4 weeks)
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Foundations in Microbiology/Talaro Chess/McGraw Hill/2008년 병원미생물학/김영권/청구문화사/제3판/2003년/p.313-314 최신미생물학/박석기 외 5명/신광문화사/제1판/2002년/p.419-422 밀레니엄 미생물학/김관천 외 10명/정문각/제4판/2009년/p.226-228
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1. Which is incorrect about Vibrio? ① G ram(-) Halophilic ② T hey grow on ordinary selective media containing bile. ③ W hen cholera toxin bind to specific intestinal receptor, a secondary signaling system is activated ④ C holera transmission is greatly influenced by the season of the year and the climate. ⑤ N one of above
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2. Which treatment is not proper for Vibrio? ① tetracycline ② oral dehydration ③ oral antibiotic ④ trimethoprimsulfa ⑤ No answer
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3. Which of following is catalase (-)? ① C① C.jejuni ② C② C.coli ③ C③ C.sputorum ④ C④ C.laridis ⑤ C⑤ C.fetus
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4. Which of following is true about Campylobacter? ① aerophobic ② oxidase (-) ③ mobile with a cilium ④ spinning motility ⑤ in respiratory tract
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5. Which is incorrect about Helicobacter pylori? ① Gram negative ② Microaerophilic ③ Oxidase (+) ④ Formation of Urease ⑤ Non-motile
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6. How can Helicobater pylori live in human stomach? (in acidic environment) ① Its receptor is the same receptor as type O blood ② It is oxidative ③ Its spiral and curved rod shape ④ It can neutralize stomach acid by making ammonium ⑤ It is acidic
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