Difference between revisions of "Escherichia coli"

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===Transmission/Exposure Routes===
 
===Transmission/Exposure Routes===
Fecal-oral route, and most illness has been associated with eating undercooked, contaminated ground beef, swimming in or drinking contaminated water, and eating contaminated vegetables; but direct person-to-person contact can also spread infection ([http://www.azdhs.gov/phs/edc/edrp/pdf/escherichiacoliset.pdf www.azdhs.gov])
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Fecal-oral route, and most illness has been associated with eating undercooked, contaminated ground beef, swimming in or drinking contaminated water, and eating contaminated vegetables; but direct person-to-person contact can also spread infection<ref name=AZDHS>[http://www.azdhs.gov/phs/edc/edrp/pdf/escherichiacoliset.pdf Arizona Department of Health Services]</ref>
  
 
===Case Fatality Ratios===
 
===Case Fatality Ratios===
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| Neonatal Meningitis
 
| Neonatal Meningitis
 
| Not Reported
 
| Not Reported
| ([http://emedicine.medscape.com/article/217485-overview#showall Medscape])
+
| <ref name=Medscape>[http://emedicine.medscape.com/article/217485-overview#showall Medscape Page]</ref>
 
|-
 
|-
 
| 3-5%
 
| 3-5%
 
| Developed hemolytic uremic syndrome
 
| Developed hemolytic uremic syndrome
 
| Not Reported
 
| Not Reported
| ([http://www.azdhs.gov/phs/edc/edrp/pdf/escherichiacoliset.pdf www.azdhs.gov])
+
| <ref name=AZDHS></ref>
 
|-
 
|-
 
| <1%
 
| <1%
 
| Not Reported
 
| Not Reported
 
| Overall
 
| Overall
|([http://www.azdhs.gov/phs/edc/edrp/pdf/escherichiacoliset.pdf www.azdhs.gov])
+
|<ref name=AZDHS></ref>
 
|-
 
|-
 
|}
 
|}
  
 
===Incubation Period===
 
===Incubation Period===
The incubation time for ''E. coli'' O157:H7 can be from 2 to 8 days, but it usually ranges from 3 to 4 days ([http://www.azdhs.gov/phs/edc/edrp/pdf/escherichiacoliset.pdf www.azdhs.gov]). 
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The incubation time for ''E. coli'' O157:H7 can be from 2 to 8 days, but it usually ranges from 3 to 4 days<ref name=AZDHS></ref>
  
 
===Burden of Disease===
 
===Burden of Disease===
The incidence of ''E. coli'' O157:H7 and non-O157 infection per 100,000 population in 2008 is 1.12 and 0.45 ([http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5813a2.htm CDC MMWR]).
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The incidence of ''E. coli'' O157:H7 and non-O157 infection per 100,000 population in 2008 is 1.12 and 0.45.<ref name=MMWR>[http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5813a2.htm CDC MMWR Apr 10, 2009]</ref>
 
====Duration of infectiousness and disease====
 
====Duration of infectiousness and disease====
 
====Symptomology====
 
====Symptomology====
Severe stomach cramps, diarrhea, and vomiting are common symptoms of E. coli O157:H7 infections.  Fever can occur but is usually less than 38.5˚C.  Symptoms generally subside within 5-7 days, although more extreme cases do exist. <ref> http://www.cdc.gov/nczved/divisions/dfbmd/diseases/ecoli_o157h7/#symptoms CDC </ref>
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Severe stomach cramps, diarrhea, and vomiting are common symptoms of E. coli O157:H7 infections.  Fever can occur but is usually less than 38.5˚C.  Symptoms generally subside within 5-7 days, although more extreme cases do exist. <ref name=CDC>[http://www.cdc.gov/nczved/divisions/dfbmd/diseases/ecoli_o157h7/#symptoms CDC Page] </ref>
  
 
====Excretion Rates  (see Exposure) ====
 
====Excretion Rates  (see Exposure) ====
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===Microbiology===
 
===Microbiology===
Gram-negative, rod-shaped bacterium that is commonly found in the lower intestine of warm-blooded organisms ([http://en.wikipedia.org/wiki/Escherichia_coli Wikipedia]).
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Gram-negative, rod-shaped bacterium that is commonly found in the lower intestine of warm-blooded organisms.<ref name=Wiki>[http://en.wikipedia.org/wiki/Escherichia_coli Wikipedia Page]</ref>
  
 
===Environmental Survival===
 
===Environmental Survival===
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===References===
 
===References===
<references />
 
 
http://en.wikipedia.org/wiki/Escherichia_coli <br />
 
http://en.wikipedia.org/wiki/Escherichia_coli <br />
 
http://en.wikipedia.org/wiki/Escherichia_coli_O157:H7 <br />
 
http://en.wikipedia.org/wiki/Escherichia_coli_O157:H7 <br />
http://emedicine.medscape.com/article/217485-overview#showall <br />
+
<references />
http://www.azdhs.gov/phs/edc/edrp/pdf/escherichiacoliset.pdf <br />
 
http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5813a2.htm <br />
 
  
 
[[Category:PSDS]][[Category:Bacterium]]
 
[[Category:PSDS]][[Category:Bacterium]]

Revision as of 16:06, 10 July 2012

Escherichia coli

Hosts

Animals and humans

Transmission/Exposure Routes

Fecal-oral route, and most illness has been associated with eating undercooked, contaminated ground beef, swimming in or drinking contaminated water, and eating contaminated vegetables; but direct person-to-person contact can also spread infection[1]

Case Fatality Ratios

Case fatality ratios
Case Fatality Ratio Pathway/conditions Population References
8% Neonatal Meningitis Not Reported [2]
3-5% Developed hemolytic uremic syndrome Not Reported [1]
<1% Not Reported Overall [1]

Incubation Period

The incubation time for E. coli O157:H7 can be from 2 to 8 days, but it usually ranges from 3 to 4 days[1]

Burden of Disease

The incidence of E. coli O157:H7 and non-O157 infection per 100,000 population in 2008 is 1.12 and 0.45.[3]

Duration of infectiousness and disease

Symptomology

Severe stomach cramps, diarrhea, and vomiting are common symptoms of E. coli O157:H7 infections. Fever can occur but is usually less than 38.5˚C. Symptoms generally subside within 5-7 days, although more extreme cases do exist. [4]

Excretion Rates (see Exposure)

Immunity

Microbiology

Gram-negative, rod-shaped bacterium that is commonly found in the lower intestine of warm-blooded organisms.[5]

Environmental Survival

Recommended Dose Response Model

Dose response models for Escherichia coli
Beta-Poisson, α is 0.16, N50 is 2.11E+06
Betapoisson model.jpg


Dose response models for enterohemorrhagic Escherichia coli (EHEC)
Exponential, k is 2.18E-04
Exponential model.png





References

http://en.wikipedia.org/wiki/Escherichia_coli
http://en.wikipedia.org/wiki/Escherichia_coli_O157:H7

  1. 1.0 1.1 1.2 1.3 Arizona Department of Health Services
  2. Medscape Page
  3. CDC MMWR Apr 10, 2009
  4. CDC Page
  5. Wikipedia Page