Two further cases of Legionnaires’ disease linked to the Renfrew area have been confirmed, taking the total number of cases in the current outbreak to eight.
Health officials said both patients are responding well to treatment at home while all the previously affected people have now fully recovered.
The two most recent cases were confirmed by NHS Greater Glasgow and Clyde (NHSGGC) following a meeting of an outbreak control team earlier today.
All eight cases are said to have had a direct or indirect link to the Renfrew area and investigations into the source of the disease have been focused on the town itself.
The first five patients diagnosed were treated in hospital and have now been discharged. The sixth patient, as with the current two, was treated at home.
The health board - which is not disclosing whether the latest patients are male or female - said its public health protection unit is working with the Health and Safety Executive, Health Protection Scotland, Renfrewshire Council and other local authorities to identify a possible source for the infection.
Legionnaires’ disease is an uncommon but serious form of pneumonia, caused by bacteria distributed widely in natural and artificial water supplies.
The symptoms include headache, fever, dry cough, breathing difficulties, stomach pains and diarrhoea.
Legionella bacteria is spread through aerosols produced from water, such as water cooling towers, air conditioning units and showers.
As a precautionary measure, all active water cooling towers in the area have been treated with chemicals that kill the legionella bacteria and a number of towers have been sampled for the disease.
The bacteria cannot be spread from person to person or contracted by drinking contaminated water. People in the Renfrew area have been advised they can continue to drink water and prepare food in the normal way.
Dr Gillian Penrice, NHSGGC consultant in public health, said: “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.”
Anyone with these symptoms is being urged to contact NHS 24 on 08454 24 24 24 or their own GP.
Earlier this week, a report revealed that dealing with an outbreak of Legionnaires’ disease in Edinburgh last year cost the health service almost three-quarters of a million pounds.
Four people were killed after catching the disease during that outbreak, with 45 people requiring hospital care.