Bordetella pertussis whoop. A coughing spell may last a minute or more, producing cyanosis, apnoea, and seizures. However, when not in a coughing fit, the patient does not experience trouble breathing. This is because "B. pertussis" inhibits the immune response, so very little mucus is generated in the lungs. A prolonged cough may be irritating and sometimes a disabling cough may go undiagnosed in adults for many months. Uncertainties of "B. pertussis" and whooping cough as a zoonotic disease have existed since around 1910, but in the 1930s, the bacteria were found to have lost their virulent power when repeatedly spread on
Unverricht–Lundborg disease ULD, MRIs taken once the disease has progressed show characteristic damage, which may help to correct a misdiagnosis. While ULD is a rare disease, the lack of well defined cases to study and the difficulty in confirming diagnosis provide strong evidence that this disease is likely under diagnosed. Unverricht–Lundborg disease is also known as EPM1, as it is a form of progressive myoclonic epilepsy (PME). Other progressive myoclonic epilepsies include myoclonus epilepsy and ragged red fibers (MERRF syndrome), Lafora disease (EPM2a or EMP2b), Neuronal ceroid lipofuscinosis (NCL) and sialidosis. Progressive myoclonic epilepsies generally constitute only a small percentage of epilepsy