Dr. Michael F Johnstone MD

Oesophageal thrush is a yeast infection of the throat. It is also known as oral candidiasis or oropharyngeal candidiasis. A healthy person is unlikely to develop this condition. It affects only those with a weakened immune system such as patients with HIV, cancer, and those on immunosuppressive...

Mono SymptomsInfectious mononucleosis is the technical and formal name of the disease commonly known as "mono". This disease is typically caused by the Epstein-Barr virus (EBV), but it can also be caused by other viruses such as cytomegalovirus. Once a person becomes infected, the symptoms may...

Influenza is a respiratory ailment caused by influenza viruses. Influenza is considered as one of the fatal viruses because it can cause death if not medically and properly addressed. Flu can be very contagious and is very likely to spread from one person to another through coughing, sneezing, or...

What is an Exercise-Induced Migraine?Exercises have been recommended by many doctors and lifestyle therapists as a healthy way of living. Unfortunately these exercises can have side effects such as migraines.Compromising on fitness is not often a preferred option but oft one chosen due to health...

Uncontrollable shivering is characterized by the rapid shifting between muscle relaxation and contraction. It is through these contractions that the body warms itself up when exposed to cold. Shivering is not always accompanied by fever. In some cases, shivering may occur before the onset of...

Lung Cancer is one of the most common and serious forms of cancers in the world. In fact, it is also one of the leading causes of cancer deaths for both men and women. This form of cancer is known to mainly affect older people, primarily those in their seventies. Smoking has been identified as one...