A GP who misdiagnosed pneumonia as bronchitis five years ago will be investigated after a coroner said the finding of localised crackles on auscultation should have made the diagnosis obvious.

The Townsville GP saw Matthew Anthony Russo when he presented with a history of flu-like symptoms and a worsening productive cough.

The 37-year-old was obese, smoked approximately 25 cigarettes a day and during the consult did not reveal he had recently used methamphetamines.

The GP said Mr Russo told him of streaking blood in his sputum. He also noted a congested throat and “some crackles” in the lower left lung, but no shortness of breath.