The condition of veteran Marxist leader and former West bengal Chief Minister Jyoti Basu has further detoriated. According to medical bulletin issued last night, his condition is very critical. Mr. Basu underwent second course of dialysis yesterday. He has been put under ventilation. A team of doctors is constantly monitoring his health. West Bengal Chief Minister Buddhadeb Bhattarcharya and CPIM pollitburo member Sitaram Yechari visited the hospital to see ailing leader. Mr Basu was admitted to a private hospital in Kolkata on the 1st of this month.<br/><br/><br/>