The story is plausible for two reasons:
1) Most enlisted military personnel at a time of war up to the 1950's were young sexually-active males. This has long been the case and applies to the military of many countries, not just the USA.
2) In some cities in Japan, prostitution was legalised and the prostitutes had rates of STD infection of up to 95%.
The only video in that Daily Mail article is of Mark McAllister.
According to this article the producers called 911, he went to hospital and was diagnosed with epilepsy. That's corroborated by this page of his employer's web site:
In March of 2011, Mark experienced a seizure while reporting live during Global Toronto’s News Hour. He was diagnosed with ...