The multidisciplinary team included NICU nurses, physicians, nurse practitioners and, perhaps most important of all, environmental services personnel. “We met with the environmental services staff, and we explained to them that this is a critical situation in the neonatal ICU. And this cannot spread more.”
The COVID-19 pandemic presented daunting challenges to hospital departments all too familiar with daunting challenges: neonatal intensive care units (NICUs). However, COVID-19 isn’t the only pathogen in town, as IPs and other health care professionals can attest. One of those health care professionals is Bhagy Navalkele, MD, an assistant professor at the University of Mississippi Medical Center who specializes in infectious diseases.
The study1 Navalkele co-wrote and presented yesterday at the annual conference of the Society for Healthcare Epidemiology of America (SHEA) explains how staff at the medical center’s NICU sprang into action to contain an outbreak of human parainfluenza type 3 (HPIV3). It is a common respiratory tract illness in infants and young children.
Bhagy Navalkele, MD
“Early diagnosis and isolation of respiratory tract viral infections is important to prevent an outbreak,” the study states. “Successful control of outbreak in NICU requires prompt implementation of IP measures with focus on symptom screening, cohorting, and disinfection practices.”
One infant was identified as having hospital onset HPIV3 on April 30, 2019. In May 2019, 3 other infants in the NICU were diagnosed. An investigation into the outbreak began on May 3, 2019. “Enhanced infection prevention (IP) measures were immediately implemented,” the study states. “All positive cases were cohorted to a single pod of the NICU and placed in contact with droplet isolation precautions.”
Navalkele tells Infection Control Today®that when the frontline health care professionals realized that they dealt with a cluster, they contacted the infection prevention department. “When we stepped in with our role as infection prevention specialists, we kind of make it a little bit more organized and structured,” she says. “We provide them definitions. We provide them a complete plan on all aspects which might have been missed.”
For instance, the IPs established a symptom screening system for all babies in the NICU, as well as all staff going in and out of the department. “All those added measures—and data mining when the outbreak ends—is performed by infection prevention.”
But the precautions didn’t end there. Other departments got involved.
“Dedicated staffing and equipment were assigned,” the study states. “Environmental cleaning and disinfection with hospital-approved disinfectant wipes was performed daily. Visitors were restricted in the NICU. All employees entering NICU underwent daily symptom screening for respiratory tract illness. All NICU babies were screened daily for respiratory tract illness with prompt isolation and RPP testing on positive screen.”
The multidisciplinary team included NICU nurses, physicians, nurse practitioners and, perhaps most important of all, environmental services (EVS) personnel. “We met with the environmental services staff, and we explained to them that this is a critical situation in the neonatal ICU. And this cannot spread more.”
EVS came through. “They helped us with cleaning, the disinfection,” Navalkele tells ICT®. “Clearing was occurring very meticulously, almost every few hours. All the surfaces were getting cleaned and the equipment was getting cleaned.”
The hospital’s laboratory also needed to get involved. “Lab was notified. We said, ‘Hey, we’re going to test all these babies for parainfluenza type 3 so that we can identify it immediately. They made sure that they had an adequate supply of testing kits. And they helped us transport those specimens to the health department” as well as the Centers for Disease Control and Prevention (CDC).
The CDC tested the HPIV3 positive test specimens using whole genome testing. In this way, investigators confirmed 7 cases of hospital onset HPIV3; 6 from the NICU and 1 from the newborn nursery. Investigators determined that the case in the newborn nursery was unrelated to the NICU cases; that the nursery baby had been infected by a sick visitor. Five of the NICU infants had lower respiratory tract illnesses, and 1 had an upper respiratory tract illness.
“Average time from admission to diagnosis was 71 days (range: 24 -112 days). None had severe illnesses requiring intubation and all had full recovery,” the study states. “No CO HPIV3 cases were reported from NICU during the investigation. Maximum likelihood phylogenetic tree of HPIV3 WGS (figure 1) showed that sequences from the 6 HO cases clustered together separately from the 3 CO controls suggesting single source of transmission and 3 CO cases were not related to the HO cases or source of the outbreak.”
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