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Published byDerick Greene Modified over 9 years ago
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VIBRIO CHOLERAE CHOLERA
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CHARACTERISTICS GRAM-NEGATIVE, COMMA SHAPED BACILLI MOTILE – POLAR FLAGELLA OXIDASE – POSITIVE CATALASE – POSITIVE ALKALNE PH ( 6.8 – 10.2) SELECTIVE MEDIA ( TCBS ) ALKALINE PEPTON WATER
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ANTIGENICITY SOMATIC – O ANTIGE VIRIO CHOLERAE O-1 NON- O-1 V. CHOLERAE V. CHOLERAE O-139 ( BENGAL) - 1992 BIOTYPES: 2 CLASSICAL (MORE SEVERE) EL-TOR SEROTYPES: 3 INABA, OGAWA, HIKOJIMA
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HABITAT HUMAN MAIN SOURCE NATURALLY IN ACQUATIC ENVIRNMENT
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PATHOGENESIS INGESTION OF CONTAMINATED DRINK WATER, FOOD ID - 10 – 10 MULTIPLY IN SMALL INTESTINE, ILEUM ENTEROTOXIN SIMILAR TO HLET OF E. COLI ACTIVATE ADENYLATE CYCLASE CAMP FLUIDS, EECTROLYTES DIARRHOEA, VOMITING
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NO INTESTINAL INVASION NO BACTEREMIA NO SEPTICAEMIA LESIONS ARE PATHOPHYSIOLOGICAL
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CLINICAL PICTURE INCUBATIN PERIOD (IP) 1 – 4 DAYS ACUTE ONSET EFFORTLESS VOMITING PROFUSE WATERY DIARRHOEA (RICE – WATER ) RAPID DEHYDRATON (10 – 20 L/ DAY) HYPOVOLAEMIC SHOCK - DEATH
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IMMUNITY VERY SHORT REINFECTIONS(REPEATED ATTACKS) ARE COMMON
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EPIDEMIOLOGY HUMAN (ONLY HOST ) POOR ENVIROMENTAL SANITATION POOR WATER SUPPLY CONTAMINATED WATER INDIAN SUBCONTINENT,BANGLADESH PANDEMICS - EL-TOR BIOTYPE OUTBREAKS EPIDEMICS ( PILGRIMAGES ) EL- TOR PROLONGED CARRIAG (ENDEMIC INFECTION)
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LABORATORY DIAGNOSIS SPECIMENS : STOOLS RECTAL SWAB MICROSCOPY: DARTING MOVEMENT CULTURE : TCBS ( YELLOW COLONIES) ALKALINE PEPTONE WATER(6 – 8 h) SEROLOGICAL IDENTIFICATION SLID AGGLUTINATION FOR SEROTYPES
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TREATMENT REHYDRATION REPLACEMENT : FLUID, ELECTROLYTES ANTIBIOTIC TETRACYCLINE
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PREVENTION CONTROL PATIENTS ISOLATION, TREATMENT CONTACTS PROPHYLAXIS (TETRACYCLINE) WATER PURE SUPPLY, PROPER TREATMENT SEWAGE PROPER DISPOSAL HEALTH EDUCATION
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VACCIN NO EFFECTIVE VACCINE AVAILABLE KILLED (INJECTION) LIVE ATTENUATED (ORAL) REACTOGENIC SHORT IMMUNITY
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V.PARAHAEMOLYTICUS FOOD POISONING SEA FOODS (RAW, UNDERCOOKED) HALOPHILIC (NACL) GROWS ON TCBS AGAR (GREEN COLONIES) TREATMENT : REHYDRATION
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CAMPYLOBACTER GRAM – NEGATIVE BACILLI S- SHAPED (SPIRAL) ACTIVELY MOTILE OXIDASE POSITIVE CATALASE POSITIVE MICROAEROPHILIC ( 5 – 10% CO ) NON CAPSULATED
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SPECIES C.JEJUNI MOST COMMON THERMOPHILIC (42C – NOT 25C ) HIPPURATE HYDROLYSIS + SELECTIVE MEDIA (SKIRROW’S ) C. COLI C. FETUS GROW AT 25 C
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DISEASES ENTERITIS 80 – 90% ( C. JEJUNI ) C. COLI SEPTICAEMIA, MENINGITIS,ENDOCAR. C. FETUS IMMUNOCOMPROMISED EXTREME OF AGE
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SOURCE INTESTINE OF BIRDS ( CHIKEN ) DOMESTIC ANIMALS, CATTELE(BEEF) UNPASTEURISED MILK CONTAMINATED WATER
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CHARACTERISTICS GRAM NEGATIVE SPIRAL SHAPED BACILLI MICROAEROPHILIC OXIDASE POSIIVE UREASE POSITIVE
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PATHOGENESIS INVASIVE DISEASE ( COLON ) – ID:100 DYSENTERIC LIKE ILLNESS BLLODY DIARROEA FEVER ABDOMINAL PAIN WATERY DIARROEA (ENTERTOXIN) ILEUM SEPTICAEMIA (IMMUNOCOMPROMISED)
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TREATMENT REHYDRATION ELECTROLYTES FLUIDS ANTIBIOTIC : ERYTHROMYCIN CIPROFLOXACIN GENTAMICIN ( SEPTICAEMIA )
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HALICOBACTER PYLORI
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HABITAT GASTRIC MUCOSA ( MUCUS LAYER )
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TREATMENT AMOXACILLIN METRONIDAZOLE + BISMUTH SUBCITRATE FOR 1 - 2 WEEK OR CLARITHROMYCIN + AMOXACILLIN + OMEPRAZOLE FOR 1 WEEK
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DISEASES CHRONIC ACTIVE GASTRITIS PEPTIC ULCER ASSOCIATED WITH GASTRIC CARCINOMA LYMPHOMA ( MALT )
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