WASHINGTON (AP) - The maker of medical scopes that have been linked to two recent "superbug" outbreaks in California has issued new cleaning instructions for the devices amid increasing scrutiny from regulators, lawmakers and medical professionals.

WASHINGTON (AP) The maker of medical scopes that have been linked to two recent "superbug" outbreaks in California has issued new cleaning instructions for the devices amid increasing scrutiny from regulators, lawmakers and medical professionals.

Olympus America sent the new guidelines to U.S. hospitals on Thursday, recommending that customers begin using them as soon as possible. The updated guidelines call for using a smaller cleaning brush and additional flushing steps to remove debris and disinfect the scope's cervices and joints. Olympus plans to send the new brush to hospital customers by May 8.

Olympus scopes were linked to infections of antibiotic-resistant bacteria at two separate Los Angeles hospitals last month. Hospital staff said the infections occurred despite following Olympus' instructions for cleaning the devices, known as duodendoscopes.