A 53 year-old-man is fighting for his life infected with Legionnaires' disease.

The Yuen Long man developed fever, cough and shortness of breath on July 29. He was admitted to Tuen Mun Hospital on August 3 and is now in critical condition.

The Centre for Health Protection confirmed the case today, bringing the year's total Legionnaires cases to four.

He has no recent travel history and his family member has no symptoms.