ST JOHNS (AFP) - An illness to rookie wicketkeeper/batsman Devon Thomas has prompted West Indies to make a change to their squad for the first two One-day Internationals against Pakistan. The West Indies Cricket Board announced on Saturday that the 21-year-old Thomas, who has played nine ODIs for the Caribbean side, has been diagnosed with chickenpox and has returned to his homeland of Antigua. Carlton Baugh Jr, the 28-year-old wicketkeeper/batsman from Jamaica, will replace Thomas in the 13-member squad. Baugh made a return to the side for the Test tour of Sri Lanka last November, and kept his place in the side until he was sidelined by a hamstring injury just ahead of the World Cup, which was recently staged in India, Sri Lanka, and Bangladesh. He has however, recovered from the setback, and was part of the home team's training camp at the West Indies High Performance Centre for the last two weeks in Barbados. Baugh has played 33 ODIs for the Caribbean side in a chequered international career, following his debut eight years ago. He is easily one of the most prolific wicketkeeper/batsmen in West Indies domestic competitions, but he has failed to transform that class into the international arena. The first ODIs between West Indies and Pakistan take place on Saturday, April 23 and Monday, April 25 at the Beausejour Cricket Ground in the island of St. Lucia. Revised West Indies squad: Darren Sammy (Captain), Dwayne Bravo (Vice Captain), Carlton Baugh, Devendra Bishoo, Darren Bravo, Kirk Edwards, Anthony Martin, Ravi Rampaul, Kemar Roach, Andre Russell, Marlon Samuels, Lendl Simmons, Devon Smith.