Twenty-five detainees have been quarantined at the immigration detention facility in Aurora due to an outbreak of scabies, Immigration and Customs Enforcement confirmed Monday evening.

Six people contracted the contagious skin condition, and 19 others were exposed to it, said ICE spokesperson Alethea Smock in a statement, as first reported by a Denver Westword journalist. The cases were confirmed Wednesday.

ICE officials attributed the outbreak at the Aurora center, run by the private prison company The GEO Group, to the influx of migrants coming into the country through the U.S. southern border.

“Each ICE detainee receives a medical examination upon arrival at the facility to check for potential signs of illness,” Smock wrote. “However, ICE has no way of knowing what diseases or viruses a person may have been exposed before they enter the facility.”

GEO spokesman Brian Miller said in a statement that the detainees contracted the infection before arriving at the Aurora detention facility.

Detainees will be treated with an ointment before being released from quarantine, which the facility expects to receive Tuesday, according to ICE.

The delay in receiving the treatment was due to lack of availability at local pharmacies, Miller told The Denver Post on Tuesday. The facility was supposed to receive the treatment Sunday, but a shipping provider error led to another delay.

The detainees will continue to be evaluated weekly in accordance with policy, Miller said.

ICE officials commended medical personnel at the center, run by the private prison company The GEO Group, for containing the outbreak from spreading further and taking swift action, per guidelines set by the Centers for Disease Control and Prevention and the ICE Health Services Corps.

ICE and The GEO Group have previously been criticized for alleged medical abuses and neglect, some of which critics say is caused by a lack of enough medical providers for the number of detainees being housed at the immigration detention center.

In October, the Aurora City Council passed an ordinance requiring all detention facilities in the city to notify the fire department of any outbreaks after a string of mumps and chicken pox outbreaks at the ICE facility earlier this year. The Aurora Fire Department confirmed that ICE detention officials notified the agency of the outbreak last week.

The mumps and chicken pox outbreaks early this year triggered a hunger strike by detainees in March and led to calls for congressional oversight.

The Tri-County Health Department and the Colorado Department of Public Health and Environment worked with ICE and the GEO Group to provide recommendations on preventing the spread of mumps and chicken pox during those outbreaks. However, scabies is not a disease outbreak that the detention center is required to report to public health departments, according to a spokesperson for Tri-County Health.

The health department can assist if The GEO group or ICE request it, but they had not asked for help as of Monday, said Tri-County Health Department spokesperson Gary Sky.