The Shiv Sena has expressed concern over the deteriorating political health of the Bharatiya Janata Party (BJP) in the wake of the recent crisis in the party and said it seemed to be down with swine flu.

"Wonder what is wrong with the BJP these days. It is either afflicted by the deadly swine flu or some other such disease," Shiv Sena chief Bal Thackeray, who is also the editor of the party mouthpiece Saamna said in an editorial on Monday.