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Nanduri SA, Metcalf BJ, Arwady MA, Edens C, Lavin MA, Morgan J, Clegg W, Beron A, Albertson JP, Link-Gelles R, Ogundimu A, Gold J, Jackson D, Chochua S, Stone N, Van Beneden C, Fleming-Dutra K, Beall B. Prolonged and large outbreak of invasive group A Streptococcus disease within a nursing home: repeated intrafacility transmission of a single strain. Clin Microbiol Infect 2018; 25:248.e1-248.e7. [PMID: 29783026 DOI: 10.1016/j.cmi.2018.04.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 04/19/2018] [Accepted: 04/30/2018] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Multiple invasive group A Streptococcus (GAS) infections were reported to public health by a skilled nursing facility (facility A) in Illinois between May 2014 and August 2016. Cases continued despite interventions including antibiotic prophylaxis for all residents and staff. Two other geographically close facilities reported contemporaneous outbreaks of GAS. We investigated potential reasons for ongoing transmission. METHODS We obtained epidemiologic data from chart review of cases and review of facility and public health records from previous investigations into the outbreak. Infection control practices at facility A were observed and evaluated. Whole genome sequencing followed by phylogenetic analysis was performed on available isolates from the three facilities. RESULTS From 2014 to 2016, 19 invasive and 60 noninvasive GAS infections were identified at facility A occurring in three clusters. Infection control evaluations during clusters 2 and 3 identified hand hygiene compliance rates of 14% to 25%, appropriate personal protective equipment use in only 33% of observed instances, and deficient wound-care practices. GAS isolates from residents and staff of all three facilities were subtype emm89.0; on phylogenetic analysis, facility A isolates were monophyletic and distinct. CONCLUSIONS Inadequate infection control and improper wound-care practices likely led to this 28-month-long outbreak of severe infections in a skilled nursing facility. Whole genome sequencing and phylogenetic analysis suggested that intrafacility transmission of a single highly transmissible GAS strain was responsible for the outbreak in facility A. Integration of genomic epidemiology tools with traditional epidemiology and infection control assessments was helpful in investigation of a facility-wide outbreak.
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Affiliation(s)
- S A Nanduri
- National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA; Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, GA, USA.
| | - B J Metcalf
- National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - M A Arwady
- Chicago Department of Public Health, Chicago, IL, USA
| | - C Edens
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, GA, USA; National Center for Emerging and Zoonotic Infectious Diseases, Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - M A Lavin
- Lavin Consulting LLC, San Francisco, CA, USA
| | - J Morgan
- Illinois Department of Public Health, Springfield, IL, USA
| | - W Clegg
- Chicago Department of Public Health, Chicago, IL, USA
| | - A Beron
- Illinois Department of Public Health, Springfield, IL, USA
| | - J P Albertson
- Illinois Department of Public Health, Springfield, IL, USA
| | - R Link-Gelles
- National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - A Ogundimu
- National Center for Emerging and Zoonotic Infectious Diseases, Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - J Gold
- National Center for Emerging and Zoonotic Infectious Diseases, Division of Mycotic Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - D Jackson
- National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - S Chochua
- National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - N Stone
- National Center for Emerging and Zoonotic Infectious Diseases, Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - C Van Beneden
- National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - K Fleming-Dutra
- National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - B Beall
- National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
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