Question category: Tropical medicine
A back packer has just returned from India and presents to his GP with a sore throat. He initially felt like he had a cold and then noticed a very severe sore throat and difficultly swallowing. He feels pyrexial and unwell. On examination there appears to be a pseudomembrane over his pharynx and he has enlarged cervical lymph nodes giving him a “bull neck” appearance. Given the most likely diagnosis, what treatment should be initiated?