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Fortunately , the number of citizenry who sign an infection from consuming foods pollute with Listeria monocytogenes is relatively humble . However , this pathogen is one of the main causes of mortality due to food poisoning .
It is clear that without enough food hygienics in the food production mountain range , Listeria represent a risk to wellness . But , even with gamy hygiene measure , Listeria is known for its ability to survive in environmental niches in which other microorganism could not .
Where To Look For Listeria And How To Avoid It?
Listeria monocytogenes is able to ‘ subside ’ on surfaces and equipment , and remain there for long periods of clip , cause recurrent hybridization - pollution . The five most common areas where we can find it are the soil , the drain , food for thought processing equipment , the freezer / cooling organisation and the air conditioning system . Considering how unmanageable it can be to eradicate it , it is best to pay maximum attention to forestall it .
Soil
Listeria monocytogenes is present around us , mainly in the soil . This means that its proliferation in the processing plant is carried out most of the time through footgear . An authoritative requirement to avoid it is to make indisputable that the footwear is neat in those areas of the plant that are susceptible , such as places where unpacked foods are handle . This can be achieved by changing the footwear in a hygiene hatch or change room . The use of credit card cover for skid is less advisable , as they can accumulate dirt or even fall apart .
evenly as important as shoe hygiene , it is to keep the land teetotal at all time . Listeria , like most bacteria , needs water to grow and endure .
In the event of a fall of mathematical product on the base , do not utilize exuberant quantity of pee to rinse it . It is much better to clean the spillage with a clash and a shaping tray and only utilise water ( and if necessary , cleaning and disinfect agent ) to remove the last remain product from the soil .
The Drains
One of the places where we can most safely get the Listeria , if it is present in the adroitness , is in the drains . They provide the sodding circumstance for the bacterium to enter and grow since all the dirty water passes through the drains , including the water from the cleaning summons . To this , we must add that there are many facility whose drains do not have a suitable hygienic design and also are not properly located , at the lowest point and with all surround floor surfaces incline towards the drain .
The Equipment
In summation to dirt and drainage , it is important to ensure that Listeria monocytogenes does not find places to settle and grow in intellectual nourishment processing equipment . Here come back into spiel the hygienic pattern of such equipment : with surface are fluid and design for prosperous cleanup ( no cracks , no sharp slant ) .
The places where there will most likely be a risk of contamination with the bacteria without being perceived are those that need manual cleaning , those that have cracks and , often , those that have stagnant water .
The closer the unpacked product is to those spots with frequent standing water , the greater the possible risk of introducing Listeria Monocytogenes into the production flow . It is necessary to keep stand water by from the open product always , at least two meters away . If it is not potential to defend this rule , consider redesign the equipment or relocating the water source .
The Freezer/Cooling system
Another area where the Listeria can hide is in the Deepfreeze or in the cool down system . This equipment has national desiccation plates , which are mechanically defrosted on a regular basis to avoid the extravagant accrual of ice rink on the plate . Next , to these denture , there is a devotee , which forces the displacement of the air to cool the fence area .
In the prevention of Listeria monocytogenes , it is all important to keep the vaporization plates clean and disinfected at all fourth dimension . As we have go through , Listeria Monocytogenes can survive at very low temperatures and even grow at temperatures as low as -5˚C. For this grounds , it is necessary to ensure that the evaporation plate and fans of all infrigidation and freezing organisation are regularly cleaned and disinfected .
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