City Councilor Erin Murphy has filed a hearing order to look into whether street cleaning equipment used in the area of Melnea Cass Boulevard and Massachusetts Avenue is spreading infectious diseases to other parts of Boston. Murphy said the city uses the same cleaning equipment on Southampton, Atkinson and Topeka streets as it does in other neighborhoods, including the South End, Back Bay, Beacon Hill and Bay Village. This creates the potential for contamination traveling from Mass and Cass to those other neighborhoods, Murphy said. She plans to discuss the hearing request at Wednesday’s City Council meeting. “It’s scary what...