Antonio Barasorda, the veteran cover singer who replaced Domingo as Cyrano on January 26, will also step in tonight and on February 4. Clifton Forbis will replace Domingo as Samson in all five February performances; a replacement for the March 2 performance has not yet been announced.

Domingo will conduct Verdi's Rigoletto as scheduled on five occasions in February. He plans to resume his vocal schedule at the Met in March, singing Cyrano on March 8, 11, and 16.

According to his web site, Domingo has no engagements scheduled outside the Met until the March 4 benefit concert hosted by New Orleans Opera.

Tracheitis is a bacterial infection of the trachea that can follow a cold or other viral respiratory infection. In children, it can lead to an obstruction of the airway, but apparently is not serious in Domingo's case.