Contrary to previous beliefs, a highly contagious healthcare-associated infection spreads within Intensive Care Units (ICUs) at a rate over three times more than previously presumed, according to fresh research. The Clostridium difficile infection, often referred to as C. diff, is known for causing symptoms ranging from diarrhea and abdominal pain to fever. Alarmingly, about 6% of C. diff cases in the United States transpire lethal outcomes.
Historically, direct patient-to-patient transmission of the disease has seemingly been a rare occurrence. However, a recent study delved deeper, tracing the bacterium’s movement beyond the patient, venturing into the broader hospital environment. This investigation revealed a much higher rate of C. diff transmission, unveiling previously undetected pathways the bacteria traverses within hospitals.
Michael Rubin, an experienced epidemiologist, infectious diseases specialist, and senior author on this study, communicated that ignoring these newly discovered transmission routes potentially subjects patients to needless risks. The detailed findings are available in the JAMA Network Open publication.
The research methodology was broad and meticulous, involving sampling from almost 200 patients across two ICUs, along with thousands of swabs from both hospital room surfaces and healthcare providers’ hands. To accurately trace the path of the bacteria, the team employed whole-genome DNA sequencing, identifying minor genetic differences that served as unique markers to track the bacterial movement within healthcare facilities.
Testing revealed the presence of C. diff bacteria in 10% of patient ICU stays. In the majority of these instances, the detected bacteria shared genetic identities with samples found in another patient or a different patient’s room, suggesting a common source of origin.
This research primarily unveils the extensive movement of C. diff from surface-to-patient and vice versa, a phenomenon far surpassing previously known dissemination extents. The study also shed light on timescale paradoxes where potential transmission events occurred without the two patients ever being in the institution simultaneously, with gaps ranging from hours to weeks.
The explanation for this irregularity lies in the resilience of C. diff. The bacteria can endure for extended periods outside a host body, thereby resisting common antibacterial measures. Consequently, these stealthy survivalists can be inadvertently transferred to various surfaces, where they organically await another susceptible patient.
Although not all varieties of C. diff invoke disease, the extensive spread of benign variants accentuates the likelihood of similar, under-the-radar transmission of harmful strains. The research team hopes that these consequential findings inspire robust measures to curb disease spread within hospitals.
Exercising meticulous hand hygiene, ensuring the use of personal protective equipment like gloves and gowns, are primary safeguards against what Rubin refers to as ‘invisible transmission.’ While it may seem basic, these are the only guarantees for disrupting the potential transmission chain.
The study received support from the National Institute of Allergy and Infectious Diseases, National Institutes of Health, and the Centers for Disease Control and Prevention. Any views expressed solely represent the authors’ perspectives and don’t necessarily echo the views of the National Institutes of Health. Additional funding disclosures have been noted by the participating researchers.
Source: https://www.futurity.org/c-diff-spreads-more-than-thought-3276492/