Health bosses have warned they can't rule out an increase in Legionnaires' Disease cases in the Greater Glasgow area over the next two weeks.

Three out of the five people who have caught the disease remain in hospital in Glasgow and are said to be responding well to treatment.

NHS Greater Glasgow and Clyde has identified the town of Renfrew as a link between the five cases of three men and two women, who are aged between 49 and 79.

Two of the five infected people live in the town and the other three have visited or worked there during the disease's two-week incubation period.

As a precaution, 14 water cooling towers within a four-mile radius of the homes of the two people who live in Renfrew have been treated with chemicals that kill the Legionella bacteria.

Samples from water supplies are also being examined but test results will not be known for some time, according to the health board.

Dr Gillian Penrice, NHS Greater Glasgow and Clyde's consultant in public health, said: "I am pleased there have been no further reported cases. However, there is still the possibility some cases may be identified, given the two-week incubation period of the disease.

"We have notified all community GPs and our frontline hospital teams to keep this outbreak uppermost in their minds when dealing with patients displaying symptoms of headache, fever, dry cough, breathing difficulties, stomach pains and diarrhoea."

Legionnaires' disease is an uncommon but serious form of pneumonia, caused by bacteria distributed widely in natural and artificial water supplies.

It is usually caught by breathing in microscopic droplets of contaminated water.

The disease cannot be spread from person to person or by drinking contaminated water.

Legionella bacteria is commonly found in harmlessly low numbers in sources of water such as rivers and lakes, but the bacteria can rapidly multiply and become dangerous if it moves into artificial water supplies, such as air conditioning systems.

Residents in the Renfrew area are urged to continue to drink water and prepare food in the normal way.

An outbreak of the disease in south-west Edinburgh last summer led to the deaths of three men among 101 confirmed and suspected cases.