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VIBRIO CHOLERAE CHOLERA. CHARACTERISTICS GRAM-NEGATIVE, COMMA SHAPED BACILLI MOTILE – POLAR FLAGELLA OXIDASE – POSITIVE CATALASE – POSITIVE ALKALNE PH.

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Presentation on theme: "VIBRIO CHOLERAE CHOLERA. CHARACTERISTICS GRAM-NEGATIVE, COMMA SHAPED BACILLI MOTILE – POLAR FLAGELLA OXIDASE – POSITIVE CATALASE – POSITIVE ALKALNE PH."— Presentation transcript:

1 VIBRIO CHOLERAE CHOLERA

2 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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5 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

6 HABITAT HUMAN  MAIN SOURCE NATURALLY  IN ACQUATIC ENVIRNMENT

7 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

8 NO INTESTINAL INVASION NO BACTEREMIA NO SEPTICAEMIA LESIONS ARE PATHOPHYSIOLOGICAL

9 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

10 IMMUNITY VERY SHORT REINFECTIONS(REPEATED ATTACKS) ARE COMMON

11 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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15 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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18 TREATMENT REHYDRATION  REPLACEMENT : FLUID, ELECTROLYTES ANTIBIOTIC  TETRACYCLINE

19 PREVENTION CONTROL PATIENTS  ISOLATION, TREATMENT CONTACTS  PROPHYLAXIS (TETRACYCLINE) WATER  PURE SUPPLY, PROPER TREATMENT SEWAGE  PROPER DISPOSAL HEALTH EDUCATION

20 VACCIN NO EFFECTIVE VACCINE AVAILABLE  KILLED (INJECTION)  LIVE ATTENUATED (ORAL) REACTOGENIC SHORT IMMUNITY

21 V.PARAHAEMOLYTICUS FOOD POISONING SEA FOODS (RAW, UNDERCOOKED) HALOPHILIC (NACL) GROWS ON TCBS AGAR  (GREEN COLONIES) TREATMENT :  REHYDRATION

22 CAMPYLOBACTER GRAM – NEGATIVE BACILLI S- SHAPED (SPIRAL) ACTIVELY MOTILE OXIDASE POSITIVE CATALASE POSITIVE MICROAEROPHILIC ( 5 – 10% CO ) NON CAPSULATED

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24 SPECIES C.JEJUNI  MOST COMMON  THERMOPHILIC (42C – NOT 25C )  HIPPURATE HYDROLYSIS +  SELECTIVE MEDIA (SKIRROW’S ) C. COLI C. FETUS  GROW AT 25 C

25 DISEASES ENTERITIS  80 – 90% ( C. JEJUNI )  C. COLI SEPTICAEMIA, MENINGITIS,ENDOCAR.  C. FETUS  IMMUNOCOMPROMISED  EXTREME OF AGE

26 SOURCE INTESTINE OF BIRDS ( CHIKEN ) DOMESTIC ANIMALS, CATTELE(BEEF) UNPASTEURISED MILK CONTAMINATED WATER

27 CHARACTERISTICS GRAM NEGATIVE SPIRAL SHAPED BACILLI MICROAEROPHILIC OXIDASE POSIIVE UREASE POSITIVE

28 PATHOGENESIS INVASIVE DISEASE ( COLON ) – ID:100 DYSENTERIC LIKE ILLNESS  BLLODY DIARROEA  FEVER  ABDOMINAL PAIN WATERY DIARROEA (ENTERTOXIN)  ILEUM SEPTICAEMIA (IMMUNOCOMPROMISED)

29 TREATMENT REHYDRATION  ELECTROLYTES  FLUIDS ANTIBIOTIC :  ERYTHROMYCIN  CIPROFLOXACIN  GENTAMICIN ( SEPTICAEMIA )

30 HALICOBACTER PYLORI

31 HABITAT GASTRIC MUCOSA ( MUCUS LAYER )

32 TREATMENT AMOXACILLIN METRONIDAZOLE + BISMUTH SUBCITRATE FOR 1 - 2 WEEK OR CLARITHROMYCIN + AMOXACILLIN + OMEPRAZOLE FOR 1 WEEK

33 DISEASES CHRONIC ACTIVE GASTRITIS PEPTIC ULCER ASSOCIATED WITH GASTRIC CARCINOMA LYMPHOMA ( MALT )


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