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Increased use of zinc in pigs could be dangerous for humans

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March 1st, 2015


This article is more than 9 years old.

Use of supplement has tripled in ten years

The use of zinc oxide among pig famers has tripled since 2005. The supplement helps pigs fight of some types of bacteria, but not the antibiotic resistant – and also zinc resistant – MRSA bacteria.

“When zinc inhibits the growth of other bacteria, it allows the MRSA bacteria thrive,”  Henrik Westh from the MRSA knowledge centre told Politiken.

An overlooked problem
Hans Jørn Kolmos, a professor of microbiology at the University of Southern Denmark, called zinc use “an overlooked problem”.

“Zinc consumption in pigs is a major problem for people because it cultivates MRSA in pigs, which is transmitted to humans,” he told Politiken.

READ MORE: Twice as many people infected by swine-borne MRSA last year

The zinc oxide is used to prevent diarrhoea in piglets that are removed from their mothers after four weeks. It is legal to mix the supplement with the piglets food for the first 14 days after they are taken away.

More zinc, less antibiotics
Antibiotics had also been used to fight diarrhoea in pigs, but as their use has dropped, the amount of zinc used had increased.

“That is probably why we are in this trap of more and more types of resistant bacteria,” said Kolmos.


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A survey carried out by Megafon for TV2 has found that 71 percent of parents have handed over children to daycare in spite of them being sick.

Moreover, 21 percent of those surveyed admitted to medicating their kids with paracetamol, such as Panodil, before sending them to school.

The FOLA parents’ organisation is shocked by the findings.

“I think it is absolutely crazy. It simply cannot be that a child goes to school sick and plays with lots of other children. Then we are faced with the fact that they will infect the whole institution,” said FOLA chair Signe Nielsen.

Pill pushers
At the Børnehuset daycare institution in Silkeborg a meeting was called where parents were implored not to bring their sick children to school.

At Børnehuset there are fears that parents prefer to pack their kids off with a pill without informing teachers.

“We occasionally have children who that they have had a pill for breakfast,” said headteacher Susanne Bødker. “You might think that it is a Panodil more than a vitamin pill, if it is a child who has just been sick, for example.”

Parents sick and tired
Parents, when confronted, often cite pressure at work as a reason for not being able to stay at home with their children.

Many declare that they simply cannot take another day off, as they are afraid of being fired.

Allan Randrup Thomsen, a professor of virology at KU, has heavily criticised the parents’ actions, describing the current situation as a “vicious circle”.

“It promotes the spread of viruses, and it adds momentum to a cycle where parents are pressured by high levels of sick-leave. If they then choose to send the children to daycare while they are still recovering, they keep the epidemic going in daycares, and this in turn puts a greater burden on the parents.”