|
|
| (18 intermediate revisions by the same user not shown) |
| Line 1: |
Line 1: |
| __NOTOC__
| | #REDIRECT [[Norovirus outbreak resident survival guide]] |
| {{WikiDoc CMG}}; {{AE}} {{TS}}
| |
| ==Definition==
| |
| [[Norovirus]] is one of the extremely [[contagious]] viruses leading to 50% of the [[gastroenteritis]] outbreaks worldwide.<ref name="pmid19084472">{{cite journal| author=Patel MM, Hall AJ, Vinjé J, Parashar UD| title=Noroviruses: a comprehensive review. | journal=J Clin Virol | year= 2009 | volume= 44 | issue= 1 | pages= 1-8 | pmid=19084472 | doi=10.1016/j.jcv.2008.10.009 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=19084472 }} </ref> An outbreak of norovirus is defined as an occurrence of 2 or more similar illnesses resulting from a common exposure that is either suspected or laboratory-confirmed to be caused by norovirus.<ref name="www.cdc.gov">{{Cite web | last = | first = | title = CDC - Norovirus - Reporting and Surveillance for Norovirus | url = http://www.cdc.gov/norovirus/php/reporting.html | publisher = | date = | accessdate = 10 February 2014 }}</ref> | |
| ==Causes==
| |
| ===Life Threatening Causes===
| |
| Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated. Severe dehydration can be a life threatening without medical attention.
| |
| ===Common Causes===
| |
| * [[Norovirus infection]]
| |
| | |
| ==Approach to Norovirus Outbreak==
| |
| Shown below is an algorithm summarizing the approach to [[norovirus]] infection outbreak.
| |
| {{familytree/start |summary=PE diagnosis Algorithm.}}
| |
| {{familytree | | | | | | | A01 | | | | | | | | | | | | | | | | | | | | | | | | |A01=<div style="float: left; text-align: left; height: 18em; width: 20em; padding:1em;">'''Characterize the symptoms'''<br>
| |
| ----
| |
| ❑ Non bloody [[diarrhea]]<br>❑ [[Vomiting]]<br>❑ [[Nausea]]<br>❑ [[Abdominal cramps]]<br>❑ [[Low grade fever]]<br>❑ Body aches <br>❑ [[Necrotising enterocolitis]] (in [[neonates]])<br>❑ Chronic diarrhea (in [[immunosuppressed]])<br> ❑ [[Irritable bowel syndrome]]</div>}}
| |
| {{familytree | | | | | | | |!| | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | C01 | | | | | | | | | | | | | | | | | | | | | | | | |C01='''Collect samples'''}}
| |
| {{familytree | | | | | | | |!| | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | |,|-|-|-|+|-|-|-|.| | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | B01 | | B02 | | B03 | | | | | | | | | | | | | | | | | | | | |B01=<div style="float: left; text-align: left; height: 25em; width: 20em; padding:1em;">
| |
| ❑ '''Whole [[stool]] sample'''<br>
| |
| '''Collection:'''<br>
| |
| : ❑ Within 48 to 72 hrs after onset<br>
| |
| : ❑ From at least 5 ill patients<br>
| |
| : ❑ 10-50 ml of whole stool sample in a stool cup is preferred.<br>
| |
| '''Storage:'''<br>
| |
| : ❑ If testing done < 3 weeks
| |
| :: ❑ Refrigerate samples at 39 F<br>
| |
| : ❑ If testing done > 3 weeks<br>
| |
| :: ❑ Refrigerate samples at - 4 F<br>
| |
| '''Transportation:'''<br>
| |
| : ❑ Bagged, sealed and transported on ice packs in an insulated and waterproof container.</div>|B02=
| |
| <div style="float: left; text-align: left; height: 20em; width: 20em; padding:1em;">
| |
| ❑ '''Vomitus sample''' <br>
| |
| : ❑ Collected, stored and transported in same ways as mentioned above for stool sample.
| |
| </div>|B03=<div style="float: left; text-align: left; height: 20em; width: 20em; padding:1em;">❑ '''Environmental samples:'''<br>
| |
| : ❑ Water sample <br>
| |
| : ❑ Shellfish samples <br>
| |
| : ❑ Environmental surface swabs<br>
| |
| (Pursued in consultation with CDC)
| |
| </div>}}
| |
| {{familytree | | | |`|-|-|-|+|-|-|-|'| | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | |!| | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | D01 | | | | | | | | | | | | | | | | | | | | | | | | |D01=<div style="float: left; text-align: left; height: 8em; width: 20em; padding:1em;"> '''Diagnostic tests''':<br>
| |
| ----
| |
| ❑ [[Enzyme immunoassays]]<br>
| |
| ❑ [[Reverse transcription-polymerase chain reaction]]<br>
| |
| ❑ [[Geno-typing]]</div>}}
| |
| {{familytree | | | | |,|-|-|^|-|-|.| | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | |!| | | | | |!| | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | E01 | | | | E02 | | | | | | | | | | | | | | | | | | | | | |E01='''[[Norovirus]]''' '''positive'''|E02='''[[Norovirus]]''' '''negative'''}}
| |
| {{familytree | | | | |!| | | | | |!| | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | F01 | | | | F02 | | | | | | | | | | | | | | | | | | | | | | F01=<div style="float: left; text-align: left; height: 5em; width: 15em; padding:1em;">❑ '''Take measures to prevent and control outbreak''' (see below)<br>❑ Treat [[acute gastroenteritis]]</div>|F02=<div style="float: left; text-align: left; height: 2em; width: 15em; padding:1em;">❑ Treat as [[Acute diarrhea resident survival guide|acute gastroenteritis]]</div>}}
| |
| {{familytree/end}}
| |
| | |
| ==Prevention and Control of Norovirus Outbreak==
| |
| Shown below is an algorithm summarizing the approach to prevention and control of a [[norovirus]] infection outbreak.
| |
| {{familytree/start |summary=PE diagnosis Algorithm.}}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | }}
| |
| {{familytree/end}}
| |
| | |
| | |
| ==Initial Management of Acute Gastroenteritis==
| |
| Shown below is an algorithm summarizing the approach to initial management of acute gastroenteritis irrespective of the causes.
| |
| {{familytree/start |summary=PE diagnosis Algorithm.}}
| |
| {{familytree | | | | | | | C01 | | |C01 = '''Assess volume status'''<br>
| |
| <table class="wikitable">
| |
| <tr class="v-firstrow"><th>'''General condition'''</th><th>Normal</th><th>Irritable/less active*</th><th>Lethargic/comatose<sup>§</sup></th></tr>
| |
| <tr><td>'''Eyes'''</td><td>Normal</td><td>Sunken</td><td> - </td></tr>
| |
| <tr><td>'''Mucosa'''</td><td>Normal</td><td>Dry</td><td> - </td></tr>
| |
| <tr><td>'''Thirst'''</td><td>Normal</td><td>Thirsty</td><td>Unable to drink<sup>§</sup></td></tr>
| |
| <tr><td>'''Radial pulse'''</td><td>Normal</td><td>Low volume*</td><td>Absent/ uncountable<sup>§</sup></td></tr>
| |
| <tr><td>'''Skin turgor'''</td><td>Normal</td><td>Reduced</td><td> - </td></tr>
| |
| </table>
| |
| † Some dehydration = At least two signs, including at least one key sign (*) are present. <BR>
| |
| ‡ Severe dehydration = Signs of “some dehydration” plus at least one key sign (§) are present.
| |
| }}
| |
| {{familytree | | | |,|-|-|-|+|-|-|-|.| |}}
| |
| {{familytree | | | D01 | | D02 | | D03 | D01 = '''No dehydration''' | D02 = '''Some dehydration''' | D03 = '''Severe dehydration'''}}
| |
| {{familytree | | | |!| | | |!| | | |!| |}}
| |
| {{familytree | | | E01 | | E02 | | E03 | E01 =<div style="float: left; text-align: left; height: 25em; width: 15em; padding:1em;"> '''Start altered diet'''
| |
| ❑ Stop lactose products <br> ❑ Avoid [[alcohol]] and high osmolar supplements <br> ❑ Drink 8-10 large glasses of clear fluids (Fruit juices, soft drinks etc) <br> ❑ Eat frequent small meals (Rice, potato, banana, pastas etc) <br>
| |
| ----
| |
| Can start [[oral rehydration therapy]] (ORT) for replacement of stool losses </div> | E02 = <div style="float: left; text-align: left; height: 25em; width: 15em; padding:1em;">❑ Start [[ORT]] at a volume of 50-100 mL/kg <br> ❑ Start altered diet <br> ❑ Reassess status every 4 hr </div>| E03 = <div style="float: left; text-align: left; height: 25em; width: 15em; padding:1em;">❑ Start IV fluids: Ringer lactate at 30ml/kg in the first 1/2hr and 70ml/kg for the next 2 1/2 hr, if unavailable use normal saline <br> ❑ [[CBC]]<br> ❑ [[Electrolytes]] <br> ❑ Assess status every 15 mins until strong pulse felt and then every 1 hr </div>}}
| |
| {{familytree | | | | | | | | | | | |!| |}}
| |
| {{familytree | | | | | | | | | | | F01 | | F01 = <div style="float: left; text-align: left; height: 25em; width: 15em; padding:1em;"> '''Patient stable and able to drink'''<br>❑ Start ORT at a volume of 100 mL/kg over 4 hour <br> ❑ Calculate the continuing stool and emesis losses every hour for additional maintenance ORT therapy<br> ❑ Reassess status every 4 hr</div>}}
| |
| {{familytree/end}}
| |
| | |
| ==Do's==
| |
| * Settings prone to outbreaks:<br>
| |
| ❑ Health care settings<br>❑ Restraunts<br>❑ Cruise ships<br>❑ Schools and other institutional settings
| |
| | |
| ==References==
| |