Trescothick is one of England's senior players

"I had to leave India because I picked up a bug and it hit me hard. I could not shrug it off and it left me fatigued," he said.

"I am keen to get back playing and am making myself available for Somerset.

"Hopefully from playing with my county I will get myself back into the England frame in the summer."

When Trescothick flew home he initially said personal reasons were behind his decision to leave the tour.

He now says spending time away from his family was part of the reason, and insisted illness was the main factor behind his departure on the eve of the Test series.

Touring Pakistan and India are probably the hardest you can do, because it is not easy to take your family away to that part of the world England opener Marcus Trescothick

"The main reason was that I picked up a bug when I was out there," said Trescothick, who said he was still suffering from the virus as recently as three weeks ago.

"The second part of Bombay really hit me hard; I wasn't sleeping and couldn't shake it off.

"We moved to Baroda, and it didn't get any better; I wasn't eating or drinking, and it really took its toll.

"It got to the point when I said I was pretty fatigued and struggling to concentrate on my cricket ahead of a big Test match.

"I spoke to the people that needed to know and decided it was the right thing to come home."

At the time of his departure, England coach Duncan Fletcher said: "Marcus Trescothick is flying home to Heathrow tonight for a family reason, and I hope his privacy is respected in this matter."

On Tuesday, Trescothick admitted that spending long periods away from his family was becoming an issue.

"We play so much; we spend 300 nights a year out of our own house either travelling the world or at hotels preparing for games in England," he said.

"There are times when you have to understand that you need to have a rest.