LEWISTON — At least 11 residents and four staff members have tested positive for COVID-19 at the Marshwood Center at 33 Roger St.

This is the second outbreak for the nursing home in the past four months. This summer, Marshwood had an outbreak that lasted weeks and ultimately involved 48 people, 31 residents and 17 staff members. Four people died.

A spokeswoman for Genesis Healthcare, the Pennsylvania for-profit company that owns Marshwood, said three staff members tested positive last week. One resident tested positive Tuesday morning, prompting rapid tests for everyone. Those tests uncovered 10 more residents with the virus and one more staff member.

The spokeswoman, Lori Mayer, said those 11 residents are “primarily asymptomatic.”

Marshwood is closed to new admissions and visitors except in end-of-life circumstances.

Several area long-term care facilities have had significant outbreaks in recent months.

Pinnacle Health and Rehab in Canton has had 138 cases, according to the last numbers available from the Maine Center for Disease Control and Prevention. That outbreak started in November.

The Sandy River Center in Farmington, also owned by Genesis, last recorded 63 cases for an outbreak that started in November, according to the Maine CDC. Mayer said a staff member tested positive at Sandy River on Wednesday.

Russell Park Rehabilitation and Living Center in Lewiston also reported an outbreak in November and reached 146 cases just before Thanksgiving. The chief operating officer for North Country Associates, Russell Park’s owner, said staff and residents have recovered and the state is expected to release the facility from outbreak status soon.