But giving a course of broad spectrum antibiotics at the start «just in case» is wrong, for what may happen is that a bacterial infection might mix with organisms that are resistant to the antibiotic, complicating the illness still further, possibly endangering life, and adding to the burgeoning problem of antimicrobial resistance. (politics.co.uk)
Infections with influenza pH1N1 virus vary from asymptomatic to serious complicated illnesses. (sciencedaily.com)
Pets with the more serious illness could require hospitalization, additional diagnostic tests to look for complicating illnesses and more substantial medical therapy. (texvetpets.org)