Food Handling Course License B Part 3 of 12 — Transcript
Full transcript
- 0:04let's look at hazards
- 0:06we have biological chemical and physical
- 0:10biological are the living ones chemicals
- 0:13and
- 0:13physical are non-living so these do not
- 0:15grow these grow if given the right
- 0:17conditions
- 0:18starting with them we have parasites
- 0:21viruses
- 0:22bacteria and fungi chemicals we have
- 0:25detergents
- 0:26pesticides lubricants allergens
- 0:28antibiotics
- 0:30bacterial and fungal toxins and what are
- 0:33all these
- 0:36some sometimes ask me why are we talking
- 0:38about antibiotics
- 0:40we're not chemists here or a pharmacy
- 0:43but
- 0:44if you consider that some of the food we
- 0:47eat
- 0:49was a living creature a few hours ago or
- 0:52a few moments ago
- 0:54and this creature was living in a farm
- 0:57and the farmer
- 0:58doesn't intend for his
- 1:02harvest to die before its time so they
- 1:05give them antibiotics when they're sick
- 1:07or they give them antibiotics
- 1:09as a preventive measure now
- 1:14if if the let's say it's a cow what are
- 1:17you talking about
- 1:18if the car was given an injection with
- 1:21antibiotics
- 1:22in its shoulder and
- 1:26not enough time was allowed for this
- 1:28antibiotic to flow in the rest of the
- 1:31body
- 1:31and not be concentrated in this part of
- 1:34the muscle
- 1:35then if this animal is slaughtered that
- 1:38muscle will contain a lot of antibiotic
- 1:40in it
- 1:42you cook it probably and the antibiotic
- 1:45will still be there
- 1:46and effective and it will affect your
- 1:48intestinal bacterial fauna
- 1:51and it will not be very helpful
- 1:54to your system so imagine all the meat
- 1:57you eat
- 1:58has that condition your system will be
- 2:01really bombarded with antibiotics
- 2:03on and off and if you happen to have
- 2:07to have a certain type of bacteria in
- 2:10your system
- 2:11who can learn how to deal with
- 2:12antibiotics it will start to create
- 2:16antibiotic resistant bacteria which is
- 2:20reality what's happening right now um
- 2:25some might some might remember depends
- 2:27on your age
- 2:28some might remember here in malta that
- 2:30you we used to go to a pharmacy and ask
- 2:33for
- 2:34a box of antibiotics and you will
- 2:37have no questions asked you will be just
- 2:40given
- 2:40a box of antibiotics one gram each
- 2:43tablet
- 2:45you will take whatever you think you
- 2:47need to take
- 2:48and then when you start to feel better
- 2:50you stop taking it
- 2:52what you've what just happened there
- 2:56is that you just made your bacteria
- 2:58inside
- 2:59your body learn how to deal with the
- 3:01antibiotic because you haven't killed
- 3:03them because you didn't finish the whole
- 3:05course
- 3:06so in fact antibiotic resistance
- 3:10was on a very quick rise until
- 3:14a decision was taken to stop
- 3:17over the counter sales and only by
- 3:20prescription sales were allowed
- 3:22nowadays if you go to a pharmacy and ask
- 3:25for an antibiotic
- 3:26even an eye drops which has antibiotic
- 3:29in them
- 3:29they would ask you for a doctor's
- 3:32prescription
- 3:34although it's we might look at it as a
- 3:37hindrance in our lives but actually it's
- 3:39for the better good
- 3:43so that is antibiotics
- 3:46about and and food toxins from bacteria
- 3:50and fungi these are really fungal
- 3:52toxins these are really strong
- 3:56toxins um to get you into perspective
- 4:01and generically speaking if we had to
- 4:04have about 750 ml
- 4:06of bacterial toxin we could
- 4:11and this is about this much
- 4:15750 ml
- 4:19we could infect the whole planet
- 4:23that is how strong these toxins are the
- 4:26whole planet i'm talking about
- 4:287 billion or so people so it's a lot of
- 4:31people that can get infected with
- 4:33such a small quantity of fluid
- 4:39physical these are agents of
- 4:44damage in our mouth damaging our
- 4:46digestive system
- 4:47they break our teeth they cut our mouths
- 4:51gums can get stuck in our throats and
- 4:54choke us as well
- 4:55glass wood metal hard plastic and any
- 4:58other foreign matter that can do the
- 4:59same job
- 5:03let's look at bacteria actually let's
- 5:05look at biological
- 5:06we'll focus on bacteria very soon
- 5:10are all bacteria bad some people might
- 5:13say jump to it and say yes yes
- 5:15they are all bad yeah bacteria
- 5:18but in reality we use bacteria and food
- 5:21production
- 5:22for example when we have milk and we
- 5:24want to make it into yogurt
- 5:26we get these type of bacteria called
- 5:28lactobacillus
- 5:29we put them in the right conditions
- 5:31inside the milk we allow them the
- 5:33time necessary and they will turn
- 5:38milk into yogurt and actually those
- 5:41types of bacteria
- 5:43we need them in our digestive system
- 5:45they help us
- 5:47they help us be healthier but then there
- 5:50are also bacteria which are bad for us
- 5:52and these in english we call them
- 5:54pathogenic pathogenic means they make us
- 5:57go sick
- 6:00viruses are the smallest kind of ant of
- 6:04of microbes we're going to talk about
- 6:05they are really really small
- 6:08and you need and they need a host
- 6:11to grow in so they can't grow on a piece
- 6:13of chicken at that piece of chicken they
- 6:15need
- 6:16a living chicken so that they can grow
- 6:18and multiply inside
- 6:20bacteria much bigger but you can
- 6:23still can't see them with your eyes you
- 6:25need a microscope
- 6:27these live independently if i put them
- 6:30on a chicken breast
- 6:31they can grow very very happily and
- 6:34become millions in a few hours
- 6:38parasites these vary in size some of
- 6:42them are
- 6:43smallest bacteria the others are some of
- 6:45them are
- 6:46much bigger we'll see more specifics
- 6:50about them
- 6:52and fungi these are the family of the
- 6:55mushrooms
- 6:56and molds were more concerned about
- 6:59the poisons they produced bacteria is
- 7:03the number one killer
- 7:04out of all these categories
- 7:08consider this a hundred percent of the
- 7:12people that go to hospital in malta
- 7:16interesting figures here we have 26
- 7:18percent
- 7:19from restaurants another 26 percent from
- 7:22households
- 7:25as you can see in equal quantities
- 7:28people go to hospital because bacteria
- 7:32and viruses do not really know where
- 7:35they are
- 7:36and if you give them the right
- 7:39conditions
- 7:40they will infect you relevant if you're
- 7:41a business or a household so we have to
- 7:44take
- 7:44care and all of this applies both
- 7:47in a household and restaurant or any
- 7:50other food preparation environment
- 7:52there is also a 29 of
- 7:56unknown they have no idea where they got
- 7:59the infection from
- 8:02and in truth it's much
- 8:06it's very difficult to identify where
- 8:09an infection comes from because
- 8:13if we had to consider that
- 8:17bacteria take time to show symptoms
- 8:21so if we always consider that if i'm
- 8:24feeling
- 8:25funny now it must be what i've just ate
- 8:28this morning or
- 8:29last evening then we would be
- 8:33judging wrongly
- 8:36some bacteria take even five days and
- 8:39ten days to show their symptoms because
- 8:42they incubate inside our bodies
- 8:44so let's take the five-day scenario if
- 8:47you had to map
- 8:48what you have eaten in the these past
- 8:50five days
- 8:51i i'm almost sure that you won't
- 8:55really remember everything that you have
- 8:59eaten in these five days so let alone
- 9:02knowing which one of those meals or
- 9:04which ingredient in those meals
- 9:06really infected you
- 9:09so it's a very justified
- 9:12figure to not know where an infection
- 9:15came from
- 9:18i had cases in the past where people
- 9:20would claim that
- 9:21it's this and it's the other that made
- 9:23them sick and
- 9:25when i ask obviously they have no logic
- 9:28behind
- 9:28their conclusions and let's just say
- 9:31because it's like that
- 9:32but in reality it's not okay do not do
- 9:34this mistake
- 9:36the only way we can be sure what made us
- 9:38sick is by having a sample of every meal
- 9:41you've had we test them in a lab we test
- 9:46you in a lab and we say okay what we
- 9:48found in the food and what we found
- 9:50inside you
- 9:50are the same pathogen and most probably
- 9:54that is the food that made you sick but
- 9:56unless you do this
- 9:57sampling from each from each meal you
- 10:00eat
- 10:01there is al almost no way to know
- 10:04viruses many millions and millions of
- 10:07types of viruses live on this planet
- 10:11the most concerned the the ones that
- 10:14we're most concerned about
- 10:16in the food industry are these mentioned
- 10:18here
- 10:19norovirus is what we commonly call the
- 10:21gastric flu
- 10:23rotavirus is also common but more
- 10:27more common in children rather than
- 10:29adults
- 10:30and then there's hepatitis a and e now
- 10:34hepatitis there's more than one type
- 10:37actually there's a b c e
- 10:40a b c d e so five types
- 10:44a and e are the only ones that can
- 10:46infect you via food
- 10:48the other types of viruses can affect
- 10:51another person with
- 10:52bodily fluids mainly blood sweat
- 10:56spit sexual fluids those are the
- 10:58pathways for the infection
- 11:00to take place on this on the picture
- 11:03here
- 11:04you can see a figure of a human this is
- 11:06the liver
- 11:07and this is an illustration of the virus
- 11:10what happens is when we eat food that's
- 11:12been
- 11:14infected with hepatitis the virus will
- 11:16travel to the liver
- 11:17will remain there for
- 11:2114 days more or less of incubation
- 11:25eventually the skin starts to turn
- 11:27yellow the
- 11:28the eyes start to turn yellow pee starts
- 11:31to turn
- 11:31reddish you get a fever you feel weak
- 11:35and you will know that you are infected
- 11:37uh it's called
- 11:38jaundice in english the condition
- 11:42this is an actual photo with a very
- 11:45powerful microscope
- 11:47of viruses noroviruses
- 11:51is really really contagious
- 11:54when you have a norovirus outbreak in a
- 11:57place
- 11:58especially if it's a confined space like
- 12:01a
- 12:02cruise ship if you get an infection of
- 12:04norovirus
- 12:06in a cruise ship because it's really
- 12:08contagious
- 12:10it will be a bit chaotic because a lot
- 12:13of people will get it
- 12:15the symptoms will be
- 12:18not not long but it will be very intense
- 12:22you probably the person will end up in
- 12:24the toilet sitting down
- 12:25and holding a bucket because the body
- 12:28will start releasing through wheels
- 12:30from every orifice and
- 12:34it was very very contagious even when
- 12:36we're taking care of someone who is sick
- 12:39when the person is vomiting they will
- 12:41create
- 12:42microscopic droplets of vomit you will
- 12:45breed
- 12:45them in you won't even notice because
- 12:47they're so small and you get infected
- 12:50so do take care when you're taking care
- 12:53of someone else
- 12:54because it can be contagious even if you
- 12:57do not
- 12:58literally touch anything because viruses
- 13:00cannot be airborne without even knowing
- 13:03now this is 1990 2012
- 13:07here and this is about viruses consider
- 13:10this part as no statistical
- 13:14data was available this is when malta
- 13:17entered eu
- 13:18we started collecting data about viruses
- 13:21and
- 13:22as we can see this is 350 here so
- 13:25that top mark is about 175 ish
- 13:30a lot of people there in 2000 2006
- 13:35and seven numbers tends to dip
- 13:38without no reason for 2009 then they
- 13:41come up again
- 13:42uh thereafter so as you can see viruses
- 13:45are like a
- 13:48they migrate and they come back you know
- 13:50some
- 13:51when they're there's a presence they
- 13:53will bloom
- 13:54and uh infect a lot of people and if
- 13:57there's no presence they will literally
- 13:59disappear
- 14:00without no no further notice
- 14:05parasites these are
- 14:08three very common types the top one
- 14:10there is jarda the bottom one is up the
- 14:12amoeba
- 14:13and this is the tapeworm these two
- 14:16live in water and they are microscopic
- 14:19you can't see them
- 14:20so if i have a jug of water here and i
- 14:25make
- 14:25put it against the light i can't expect
- 14:28to see amoebas or jardis flowing in
- 14:30there because they're microscopic
- 14:33this one grows up to 10 meters inside
- 14:37the body
- 14:38so although it's huge 10 meters
- 14:42you won't you won't see it walking
- 14:43around or crawling on the floor like a
- 14:46snake
- 14:46because it grows inside the intestine of
- 14:49the person who is infected
- 14:52with the jarda you will get diarrhea and
- 14:55cramps and the fever
- 14:57with the amoeba you will also see blood
- 14:59with the feces
- 15:00and which means the amoeba will kill you
- 15:04faster than the other one
- 15:06because it will help you lose
- 15:09more fluids quicker
- 15:13the tapeworm the the life cycle of the
- 15:16tapeworm is different
- 15:18normally if let's imagine
- 15:21let's imagine i am i am the person who
- 15:24was infected
- 15:25and i do not know it yet the tapeworm
- 15:28will start to eat from whatever i'm
- 15:30eating
- 15:31and it start to grow inside me inside my
- 15:34intestines until it basically reaches
- 15:36the end of the tunnel
- 15:38i will eventually start to become really
- 15:40itchy on my backside
- 15:42so issue that i won't be washing my
- 15:45hands
- 15:46that often and i'm an employee in the
- 15:49food sector
- 15:50so i would be touching food now imagine
- 15:53i'm doing salads
- 15:54and i'm not washing my hands that often
- 15:57i have probably some eggs from the
- 16:00tapeworm underneath my fingernails which
- 16:02i'm
- 16:03dropping on the food the next person
- 16:05who's gonna eat
- 16:06that salad because the salad is not
- 16:07going to get cooked will
- 16:09get tapeworm and the cycle repeats
- 16:12itself with other people
- 16:14however and luckily for us in malta
- 16:18parasitic data about tapeworm i couldn't
- 16:21find and neither do
- 16:22me buckases but there were a few gerda
- 16:25cases
- 16:26uh but the numbers are really small the
- 16:28highest peak there is about
- 16:3111 11 people so
- 16:34not really a very big statistic but
- 16:39still multi-step water is really safe
- 16:44to drink although it tastes funny it's
- 16:46really safe to drink
- 16:47because it has been treated with by
- 16:49reverses moses and also
- 16:51it has been added with preservatives in
- 16:54it
- 16:56yet people did get an infection probably
- 16:58by drinking either collected rain water
- 17:01on from underground water which was not
- 17:04well
- 17:05well preserved
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