Curtis Donskey’s group recently published a multicentre randomised trial in 16 US hospitals to evaluate the impact of an enhanced cleaning programme (including fluoruescent markers, environmental cultures, and feedback to cleaners) on the transmission of C. difficile. The intervention resulted in an increase in the removal of fluorescent markers, a reduction in environmental contamination with C. difficile, but no reduction in healthcare-associated CDI!
Well I was looking for a Friday afternoon sort of post and you know when you wait a while and two come at once?.. So firstly, some may recall that I have previously highlighted the utility of a sensitive nose in detecting a variety of things in a previous post. In a study just posted online first in the Journal of Hospital Infection, a springer spaniel was trained to detect C. difficile in the environment with a fair degree of success, especially for detecting rooms in which C. difficile was not present. Continue reading
A fantastic NEJM study by Mark Wilcox et al. brings monoclonal antibodies* to the party in preventing recurrent C. difficile infection. In this hugely impressive RCT (well, two squashed together actually), patients who received bezlotoxumab (a monoclonal antibody against C. difficile toxin B) were significantly less likely to suffer recurrent CDI (17% for bezlotoxumab vs 27% for placebo).
A few weeks ago in LID this marvellous paper, clearly demonstrated the reduction of fluoroquinolone-resistant but not fluoroquinolone-susceptible C. diff infections (CDI) in English hospitals, coined as “the English C. diff miracle”. The CDI decline coincided with the reduction of fluoroquinolone use, but also with a period in which “horizontal” infection control measures, such as hand hygiene, were improved. As the latter would be equally effective in preventing transmission of resistant and susceptible strains, the fluoroquinolone reduction was considered causative for the observed reduction. A very simple model tells us that that is not necessarily the case. Continue reading
A new Lancet ID study suggests that restriction of fluoroquinolone usage has been the main driver of the national reduction in C. difficile infection in England. This paper is challenging in terms of some of the accepted approaches to controlling the transmission of C. difficile: if it’s all about reducing fluoroquinolones (and antimicrobials in general) and nothing to do with these measures, then why invest so much time and energy in isolation of symptomatic cases, cleaning and disinfection etc?
What an excellent start of 2017. A great study from the USA today in Lancet: In a pragmatic cluster-randomized crossover study they tested 4 patient room cleaning strategies on the effectiveness to reduce acquisition with relevant bacteria for the incoming patients. The conclusion states that “enhanced terminal room disinfection decreases the risk of pathogen acquisition.” Yet, this paper is so “data-dense” that you must read the methods (and supplements) to get the picture. In one shot: Not for C. diff, may be for MRSA and yes for VRE. Continue reading
A fascinating new JAMA Internal Medicine study suggests that being admitted to a room when the prior occupant had taken antibiotics increases the risk of the subsequent occupant of the same room developing C. difficile infection (CDI). Quite a few convincing epi studies have showed that admission to a room when the prior occupant was known to have a number of key pathogens (including C. difficile) increased the chance of acquisition for the subsequent occupant. But this study extends the ‘prior room occupancy’ concept into a new dimension!