II. History

  1. Famous role in public health history
  2. London Physician John Snow (1813-1858)
    1. Linked Cholera outbreak to Broad Street Pump in 1854
    2. Proved Cholera to be a Waterborne Illness
    3. Snow was also a proponent of anesthesia in childbirth
    4. Knighted by Queen Victoria on birth of seventh child

III. Pathophysiology

  1. Incubation: 4 hours to 5 days (average 2-3 days)
  2. Causes Toxigenic, Secretory Diarrhea
    1. Enterotoxin adheres to intestinal epithelial cell
    2. Fluid loss occurs in Small Bowel
    3. Large Intestine is overwhelmed by large fluid volume
    4. Unable to reabsorb majority of fluid losses
  3. Organism survival
    1. Not viable in pure water (stable in salt water)
    2. Survives up to 24 hours in sewerage
    3. Survives in impure water with organics for 6 weeks
    4. Withstands freezing for 3-4 days
    5. Readily killed by drying, heat, or disinfectants

IV. Transmission

  1. Fecal contamination of food or water
    1. Waterborne Illness
    2. Foodborne Illness
  2. Heavily soiled hands or utensils
  3. Biological Weapon
    1. Infective aerosol dose: 10-500 organisms

V. Symptoms

  1. Asymptomatic to severe sudden onset
    1. Only 1 symptomatic patient for every 400 infected
  2. Vomiting
  3. Headache
  4. Intestinal cramping
  5. Low grade fever or afebrile
  6. Painless voluminous Diarrhea
    1. Rice water stools
  7. Fluid losses: 5-10 liters per day

VI. Signs

  1. Dehydration
  2. Hypovolemia to shock

VII. Course

  1. Death may occur due to severe dehydration if untreated
  2. Usual duration: 1 week

VIII. Labs

  1. Stool microscopy
    1. No or minimal Fecal Occult Blood
    2. No or minimal Fecal Leukocytes
    3. Darting, motile short curved Gram Negative Rods
  2. Darkfield microscopy
  3. Phase contrast microscopy

IX. Management: Fluid and electrolyte replacement

X. Management: Antibiotics

  1. Indication
    1. May shorten the duration of Diarrhea
    2. Reduces bacterial shedding
  2. Adult Preparations
    1. Tetracycline 500 mg four times daily for 3 days
    2. Doxycycline 300 mg x1 dose or 100 mg bid for 3 days
    3. Azithromycin 500 mg orally daily for 3 days (or 1 g for 1 dose)
    4. Erythromycin 250 mg orally three times daily for 3 days
  3. Child Preparations
    1. Azithromycin 10 mg/kg/day orally daily for 3 days
    2. Erythromycin 40 mg/kg/day divided qid for 3 days
  4. References
    1. Gilbert (2013) Sanford Guide

XI. Prevention

  1. Water Disinfection
    1. Dry heat at 117 degrees C (steam or boiling)
    2. Short exposure to disinfectants
    3. Water chlorination
  2. Good Hygiene
  3. Licensed killed Cholera Vaccine
    1. Efficacy: 50% protection lasts only 6 months
    2. Vaccine schedule
      1. Initial Doses: 0 and 4 weeks
      2. Booster Doses: every 6 months

Images: Related links to external sites (from Google)

Ontology: Cholera (C0008354)

Definition (MEDLINEPLUS)

Cholera is a bacterial infection that causes diarrhea. The cholera bacterium is usually found in water or food contaminated by feces (poop). Cholera is rare in the US. You may get it if you travel to parts of the world with inadequate water treatment and poor sanitation, and lack of sewage treatment. Outbreaks can also happen after disasters. The disease is not likely to spread directly from one person to another.

Often the infection is mild or without symptoms, but sometimes it can be severe. Severe symptoms include profuse watery diarrhea, vomiting, and leg cramps. In severe cases, rapid loss of body fluids leads to dehydration and shock. Without treatment, death can occur within hours.

Doctors diagnose cholera with a stool sample or rectal swab. Treatment includes replacing fluid and salts and sometimes antibiotics.

Anyone who thinks they may have cholera should seek medical attention immediately. Dehydration can be rapid so fluid replacement is essential.

Centers for Disease Control and Prevention

Definition (MSH) An acute diarrheal disease endemic in India and Southeast Asia whose causative agent is VIBRIO CHOLERAE. This condition can lead to severe dehydration in a matter of hours unless quickly treated.
Definition (CSP) acute diarrheal disease endemic in India and southeast Asia whose causative agent is Vibrio cholerae; can lead to severe dehydration in a matter of hours unless quickly treated.
Concepts Disease or Syndrome (T047)
MSH D002771
ICD9 001.9, 001.0, 001
ICD10 A00 , A00.9, A00.0
SnomedCT 154269008, 186087007, 187267007, 186089005, 63650001, 61972007, 186088002
English Choleras, Cholera due to Vibrio cholerae, ASIATIC CHOLERA, CHOLERA, EPIDEMIC CHOLERA, VIBRIO CHOLERA INFECTION, Cholera, NOS, Cholera - O1 group V cholerae, Cholera - O1 group Vibrio cholerae, Cholera - Vibrio cholerae, Cholera NOS, Cholera, unspecified, [X]Cholera, unspecified, cholera (diagnosis), cholera, E-116 CHOLERA, (Cholera) or (Vibrio cholerae) (disorder), cholera due to Vibrio cholerae, cholera due to Vibrio cholerae (diagnosis), Vibrio cholera gastroenteritis, Vibrio cholerae gastroenteritis, Unspecified cholera, [X]Cholera, unspecified (disorder), Cholera d/t vib cholerae, Cholera NOS (disorder), Classical cholera, Cholera [Disease/Finding], asiatic cholera, choleras, epidemic cholera, Vibrio cholerae infection, Cholera (disorder), cholera; classical, classical; cholera, Vibrio cholerae 01; cholera, Vibrio cholerae, Cholera - Vibrio cholerae (disorder), Cholera due to Vibrio cholerae (disorder), (Cholera) or (Vibrio cholerae), Cholera
Dutch niet-gespecificeerde cholera, cholera door Vibrio cholerae, Vibrio cholerae-gastro-enteritis, cholera, niet-gespecificeerd, Vibrio cholerae gastro-enteritis, Vibrio cholerae 01; cholera, cholera; klassiek, klassiek; cholera, Cholera, niet gespecificeerd, cholera, Cholera
French Gastro-entérite à Vibrio cholera, Gastroentérite à Vibrio cholerae, Choléra, non précisé, Choléra non précisé, Choléra à Vibrio cholerae, Choléra
German Cholera, unspezifisch, unspezifische Cholera, Cholera, verursacht durch Vibrio cholerae, Vibrio cholera-Gastroenteritis, Vibrio cholerae-Gastroenteritis, Cholera, nicht naeher bezeichnet, Cholera
Italian Gastroenterite da Vibrio cholerae, Colera, non specificato, Colera non specificato, Colera da Vibrio cholerae, Colera
Portuguese Cólera NE, Gastrenterite por Vibrio cholerae, Cólera por Vibrio cholerae, Cólera
Spanish Cólera no especificado, Cólera por Vibrio cholerae, Gastroenteritis por Vibrio cholerae, Gastroenteritis por Vibrio cholera, Cholera, Vibrio cholerae, (Cholera) or (Vibrio cholerae), [X]cólera, no especificado, [X]cólera, no especificado (trastorno), cólera (trastorno), cólera - Vibrio cholerae (trastorno), cólera - Vibrio cholerae, cólera por Vibrio cholerae (trastorno), cólera por Vibrio cholerae, cólera, SAI (trastorno), cólera, SAI, cólera, Colera, Cólera
Japanese コレラ、詳細不明, コレラ菌胃腸炎, コレラ, 詳細不明のコレラ, コレラ菌によるコレラ, コレラショウサイフメイ, ショウサイフメイノコレラ, コレラキンニヨルコレラ, コレラキンイチョウエン, コレラ
Swedish Kolera
Czech cholera, Cholera vyvolaná Vibrio cholerae, Cholera, Blíže neurčená cholera, Cholera, blíže neurčená, Gastroenteritida vyvolaná Vibrio cholerae
Finnish Kolera
Russian KHOLERA, ХОЛЕРА
Korean 상세불명의 콜레라, 콜레라
Polish Zakażenie Vibrio cholerae, Cholera
Hungarian nem meghatározott cholera, Vibrio cholerae okozta cholera, Vibrio cholerae gastroenteritis, cholera k.m.n., cholera, Vibrio cholerae által okozott gastroenteritis

Ontology: Vibrio cholerae (C0042629)

Definition (NCI) Any bacterial organism that can be assigned to the species Vibrio cholerae.
Definition (NCI) A species of facultatively anaerobic, Gram negative, curved rod shaped bacteria assigned to the phylum Proteobacteria. This species is motile, oxidase and lipase positive, can use a wide variety of sugars as carbon sources, does not require salt for growth, and produces cholera toxin. V. cholerae is the causative agent of cholera.
Definition (CSP) etiologic agent of human Asiatic cholera; some strains produce a milder, cholera-like disease.
Definition (MSH) The etiologic agent of CHOLERA.
Concepts Bacterium (T007)
MSH D014734
SnomedCT 75953000
English Vibrio comma, VIBRIO CHOLERAE, V. cholerae, Vibrio cholerae Pacini 1854, VIBRIO COMMA, cholerae vibrio, cholera vibrio, vibrio cholera, vibrio cholerae, v. cholerae, Bacillo virgola del Koch, Bacillus cholerae, Bacillus cholerae-asiaticae, Kommabacillus, Liquidivibrio cholerae, Microspira comma, Pacinia cholerae-asiaticae, Spirillum cholerae, Spirillum cholerae-asiaticae, Vibrio cholera, Vibrio cholerae-asiaticae, Vibrio cholerae (organism), Vibrio cholerae
French Vibrion cholérique, Vibrio comma, Vibrio cholerae
Swedish Vibrio cholerae
Czech Vibrio cholerae
Finnish Vibrio cholerae
Italian Vibrio comma, Vibrio cholerae
Russian KHOLERNYE VIBRIONY, KHOLERY VOZBUDITEL', VIBRIO ALBENSIS, VIBRIO COMMA, VIBRIO ELTOR, VIBRIO PROTEUS, ХОЛЕРНЫЕ ВИБРИОНЫ, ХОЛЕРЫ ВОЗБУДИТЕЛЬ
Japanese コレラ菌, ビブリオ・コレレ, コンマ菌, ビブリオコレラ
Croatian VIBRIO CHOLERAE
Polish Vibrio cholerae, Przecinkowce cholery
Spanish Vibrio cholerae (organismo), vibrión colérico, Vibrio cholerae, Vibrio comma
German Vibrio cholerae, Vibrio comma
Dutch Cholerabacil, Cholerabacterie, Vibrio cholerae, Vibrio comma
Portuguese Vibrio cholerae, Vibrio comma