Lisa Argilla, a vet at Wellington Zoo, said they suspected it had suffered multiple organ failure.
Best was also an alcoholic who died in 2005 aged 59, after suffering multiple organ failure.
He witnessed fellow volunteers collapse in agony as they suffered multiple organ failure.
Lisa Argilla, the veterinary science manager at the zoo, said Friday that they suspect the penguin suffered multiple organ failure.
All three died after suffering severe respiratory symptoms, including acute respiratory distress syndrome and eventually septic shock and multiple organ failure.
He was taken to hospital accompanied by police but died eight days later from multiple organ failure as a result of the severe burns.
Belfast-born Best, a football legend for Northern Ireland and Manchester United, died in November 2005 of multiple organ failure after a long battle against alcoholism.
Most prominently, teenager Jesse Gelsinger died from multiple organ failure a few days after receiving a massive dose of virus-based gene therapy in a trial at the University of Pennsylvania.
Jarque's death comes two years after that of Sevilla and Spain defender Antonio Puerta, who suffered multiple organ failure in hospital, three days after a cardiac arrest during a league match against Getafe.
All ended up seriously ill, with multiple organ failure, soon after being injected with the drug at a special testing unit at Northwick Park Hospital in London, run by a company called Parexel.
There was a young woman with multiple organ failure from a devastating case of pneumonia, a man in his mid-sixties with a ruptured colon that had caused a rampaging infection and a heart attack.
"As the penguin arrived nearly 3kg (6.6lb) underweight, it had absolutely no reserves and subsequently we suspect that this led to multiple organ failure, following the kidney failure diagnosed on its arrival, " Ms Argilla said.
Walter Park, who had a heart attack last October and had multiple organ failure during a seven-week hospital stay at UCSF, says that after returning home he was "weak as a kitten" and spent months trying to rebuild muscle strength and stamina.
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