Reports of outbreaks in nursery school, elementary school, elderly person facility increase.
In each family, please note appropriate processing of hand-washing, flight and vomiting thing, enough heating of food.
Infectious gastroenteritis due to norovirus is infectious disease to be a lot prevalent in winter mainly, but outbreak is seen throughout the year.
We understand characteristic of norovirus, and let's prevent infection due to norovirus.
Infectious gastroenteritis is generic name of infection to cause gastroenteritis symptoms such as diarrhea, vomiting with bacteria, virus.
Most of causative pathogens are norovirus.
In addition, there are rotavirus, sapovirus, adenovirus.
In Yokohama-shi, we receive outbreak report of infectious gastroenteritis from "fixed point medical institution" of 94 places of cities every week.
In addition, in average year, outbreaks occur frequently at infants facility (nursery school, kindergarten), school, elderly person facility, hospital.
When we warn not to be usually infected at such a place living a group life, and infected person is confirmed in facility, correspondence for prevention of prompt infection spread is necessary.
<< reference >> Infectious gastroenteritis city outbreak trend fixed point information (Yokohama City Inst. of Health homepage)
Acute gastroenteritis is caused to person of every age, and norovirus is strong virus of infection so that viral load is infected with less than 100 minimal quantity.
It occurs throughout the year, but is prevalent in winter (mainly from November to February) in particular.
Symptoms such as diarrhea, vomiting, fever are almost seen after latency period of 1-2 days when infected with norovirus.
We recover from the onset in 1-2 days, but it is aggravated, and attention is usually necessary for infants and elderly person who are poor at resistance as we may let the trachea clog up with vomitus.
<< reference >> Q&A (Ministry of Health, Labour and Welfare homepage) about norovirus
Norovirus is transmitted by entering at entrance.
We greatly divide into infection, and there are three next routes.
Particularly, secondary infection with infectious disease route occurs a lot 1.
The most effective infection precaution is hand-washing. After the front and restroom of cooking, let's wash hand well. In addition, we always take enough sleep and nutrition, and let's keep physical condition well.
Infection power of norovirus is lost in heating more than 85 degrees Celsius one minute. Food in particular will heat up at central temperature 85-90 degrees Celsius more than 90 seconds.
Infection preventive measures against hand-washing are necessary to have possibilities to continue exhausting virus after the recovery for around one month when we are infected with norovirus if long for one week.
<< reference >> "Method of hand-washing" (PDF)
A large quantity of norovirus is included in vomiting thing, ordure of infected person.
In addition, when norovirus dries, we drift in the air and this is in mouth and may infect.
Therefore, vomiting things process immediately, and please ventilate after the processing during processing enough.
Let's use chlorine-based bleach (ingredient: sodium hypochlorite) for disinfection of norovirus by all means.
(※ attention! Alcohol and reverse soap are not effective.)
<< reference >> "Disposal of vomiting things, disinfection method" (PDF)
<< reference >> ★"(precautions) with sodium hypochlorite"
When person who was already infected does cooking of meal, we touch norovirus for food, and attention is necessary as person who ate it may infect.
This virus does not have effective antiviral agent and vaccine. Symptomatic treatment is usually provided.
Let's perform supply of moisture and nutrition enough that dehydration is caused and is not worn out while diarrhea or vomiting continue. Weak infants and elderly person of resistance in particular require attention.
When symptom is severe, please consult medical institution early.
When there is person with symptom to you and family, let's be careful not to be infected secondarily.
When person cooking food is infected, we add norovirus to food, and person who ate it may be poisoned by food.
Therefore, one that we eat and assist in cooking worker, facility performs health care from on day, and person with poor physical condition such as diarrhea will write down work engagement.
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