Study finds new superbug typhoid strain behind Pakistan outbreak Posted on February 21, 2018 by admin An outbreak of typhoid fever in Pakistan is being caused by an extensively drug resistant “superbug” strain, a sign that treatment options for the bacterial disease are running out, researchers from the Wellcome Sanger Institute say Post navigation Typhoid outbreak: Genetic cause of extensive drug-resistance foundFirst child vaccinated with typhoid conjugate vaccine in Africa