"To our knowledge, this is the first time the mobile phone microscope had been used in the field to diagnose intestinal parasitic infections, " said Isaac Bogoch, an internal medicine specialist at Toronto General Hospital.

CNN: STORY HIGHLIGHTS

Researcher Dr Isaac Bogoch, who specialises in internal medicine and infectious diseases at Toronto General Hospital, told the BBC he had read about smartphone microscopes being trialled in a laboratory and decided to "recreate it in a real world setting".

BBC: Worms detected by converted iPhone microscope

Tickets for the shows in Oakland, San Jose, Toronto and Chicago will go on sale to the general public April 8 and will also be available at Rollingstone.com.

CNN: Rolling Stones announce new tour