There is an outbreak of watery diarrhea due to Shigella occurred in several day care centers in Pondicherry. Which Shigella sp. is most likely involved?: (A) S. boydii, (B) S. flexneri, (C) S. sonnei, (D) S. dysenteriae
Answer is B. S. flexneri- most common in India- Shigella sonnei is the most common in developed countries and generally causes a watery diarrhea.- Shigella dysenteriae causes dysentery characterized by tenesmus and the production of scanty, bloody stools.