First Description of Shigella sonnei Harboring blaCTX-M-55 Outside Asia

Shigella sonnei harboring bla(CTX-M-55) was isolated outside of Asia for the first time. The bla(CTX-M-55) gene was found to be downstream of ISEcp-1 and located in a similar to 130 kb conjugative plasmid belonging to the I1 incompatibility group. The strain was recovered from a 7-year-old Ecuadorian girl with watery diarrhea who had not travelled abroad. Recent local data describe the emergence of bla(CTX-M-55) and other variants typically found in Asia in the Andean Region, suggesting that increased travel of humans and trade relationships with Asian countries are influencing the current Ecuadorian bacterial resistance situation.