CASES of whooping cough in the north west have seen a sharp increase during the past 12 months.

The number of infections reported to the Health Protection Agency (HPA) has risen from 65 in 2010 to 107 in 2011.

The figures reflect a national upward trend in levels of the illness, which more than doubled from 421 cases last year to 1040 in 2011, according to figures published last week.

Whooping cough, also known as pertussis, affects all ages but can be a serious illness in the very young.

During the past few months, the HPA has reported an increase in cases in people aged between 15 and 40.

Dr Mary Ramsay, head of immunisation at the HPA, said: “We usually see a rise in cases of whooping cough every three to four years as the disease peaks in cycles, with 2008 being the last peak year.

“The uptake of the vaccine which protects against whooping cough is very good but it is a highly infectious disease so when there is a case it can spread quickly.

“Parents should ensure their children are up-to-date with their vaccinations so that they are protected at the earliest opportunity.

“The pre-school booster is also important, not only to boost protection in that child but also to help prevent them passing the infection on to vulnerable babies, as those under four months cannot be fully protected by the vaccine.”

The main symptoms of whooping cough is severe coughing fits which in babies and children, are accompanied by a ‘whoop’ sound as the child gasps for breath.

Very young children have the highest risk of complications and death.

Vaccination is the most important measure in preventing the disease and children are offered vaccines at aged two, three and four months as part of the routine child vaccination programme.

Dr Sam Ghebrehewet, the HPA’s immunisation leader for the north west, added: “We are advising everyone to be aware of the signs and symptoms for whooping cough as it can affect people of all ages and can cause serious illness.

“What could be thought of initially as a common cold with similar symptoms, can become more severe and persist for several weeks.”