A recently concluded study has indicated that hospitals may play a significant part in the community spread of antibiotic-resistant bacteria. The study hints at the possibility that family members living with patients recently discharged from hospital settings may face an elevated risk of acquiring antibiotic-resistant infections, even when the patient was not diagnosed with the infection during their hospital stay. These insights pave the way for understanding the dynamics of how superbugs, or antibiotic-resistant pathogens, spread within communities. The research was published in ‘Infection Control & Hospital Epidemiology,’ a journal maintained by the Society for Healthcare Epidemiology of America (SHEA).
The study further notes that if recently discharged patients were diagnosed with Methicillin-resistant Staphylococcus aureus infection (MRSA) – often deemed a ‘superbug’ due to its resistance to many common antibiotics – their familial cohabitants faced an even higher risk of contracting the infection. Moreover, the duration of the patient’s stay at the hospital, regardless of MRSA diagnosis, played a pivotal role in determining the risks to family members.
Aaron Miller, Ph.D., lead researcher and research assistant professor of internal medicine-infectious diseases at the University of Iowa, explained that patients could be colonized with MRSA during their stay in the hospital. These patients might subsequently transmit MRSA to members of their household, even if they show no symptoms. This finds hospitals inadvertently playing a part in facilitating the spread of MRSA into the broader community through discharged asymptomatic MRSA carriers.
The study has prompted the recommendation of bolstering infection control rituals within hospitals, including rigorous testing for MRSA colonization, especially during discharge, even if no symptoms are manifested. This encourages vigilance against MRSA colonization and infections among hospital patients and their household contacts, to promptly identify and manage transmission.
SHEA President, Thomas Talbot, M.D., who was not involved with this study, stressed on the crucial role of core infection practices in preventing the spread of resistant bacteria. This includes hand hygiene, thorough environmental cleaning, and interventions to reduce Staphylococcal colonization.
The study monitored insurance claims data from over 158 million enrollees with at least two family members on the same plan. From this pool, the study observed 424,512 MRSA cases among 343,524 insured people and identified instances potentially indicative of MRSA transmission to a family member post the hospitalization of a relative. In total, the researchers registered 8,064 such potential transmissions of MRSA following the hospital stay of a family member who did not carry a MRSA diagnosis.
However, Miller warns against overestimating the risk related to hospital stays. Although the study identified a significant risk factor for MRSA transmission within households and communities, the overall risk remains relatively low. The research has opened a vein of understanding into the complexities of MRSA transmission and the strategies that could possibly be implemented to mitigate its spread.