The Centre for Health Protection confirmed today the year's first case of leptospirosis involving a 12-year-old Fanling boy.

He came down with fever, malaise and a rash on May 13. He was admitted to a private hospital May 20 and transferred to Prince of Wales Hospital May 26. He has recovered and was discharged June 2.

Leptospirosis is an infectious disease caused by bacteria found in the waste of infected animals like rodents, cattle, pigs, horses and dogs. Most human infections occur through skin abrasions, open wounds or mucous membranes, and occasionally through ingestion or inhalation.

Overseas outbreaks are usually related to occupational or recreational water exposure, such as water contaminated with the urine of infected animals.

There were three cases last year, three in 2006 and seven in 2005.