A comprehensive and impressive cluster randomised crossover study published in Lancet ID examines whether it makes sense to use single rooms (as compared with multi-bed bays) to apply contact precautions for patients known to be carrying ESBL-Enterobacteriaceae. I need to be careful what I say, because fellow bloggers Marc and Andreas are co-authors. However, the gist seems to be: don’t bother with single rooms for ESBL-E carriers – but many hospitals don’t have capacity to do that anyway, so this may not be a practice-changing finding in many parts of the world!
A fascinating study from a European research group has unravelled the molecular epidemiology of a large European collection of carbapenem-resistant Klebsiella pneumoniae clinical isolates. Most carbapenem resistance was due to an acquired carbapenemases, transmission clusters were common within and between hospitals, carbapenemase-producing isolates are more likely to spread in hospitals, and 21 SNPs is the magic number for defining CPE person-to-person transmission using WGS.
I made a flying visit to HIS today in Liverpool to have a debate with Prof Mark Wilcox on whether or not antibiotics are the most important factor in healthcare-associated C. difficile infection. Mark was arguing for the motion, and I was arguing against it. And the result…well you’ll have to read to the bottom!
I recently posted on the WHO CPE guidelines. A couple of people have alerted me to two other recently published guidelines, one from ECDC, and the other from Australian Commission on Safety and Quality in Healthcare. So, we now have a wealth of guidelines to prevent and control CPE. But how to they compare?
In a remarkable quirk of academic publishing, two virtually identical studies by separate research groups in the UK (one in London, and one in Cambridge) published a week apart have come to the same conclusion: that we are missing a sizable portion of MRSA transmission by focussing solely on wards in a single hospital. A referral-network level view is required for an accurate picture of MRSA transmission. (You may have seen some press about the Cambridge article, e.g. on the BBC here.)
I came to ECCMID 2017 with a very specific question: do we need to think beyond ‘same-bug-same-gene’ horizontal transmission from a practical IPC view point in order to address the threat of IPC? The answer, unfortuantely, is yes!
I posted a blog a couple of years ago (was it really that long!) on a fascinating study suggesting that only 1/5 of S. aureus in hospital patients is hospital-acquired. My key conclusion from that study was that the number of potential sources for S. aureus that the team investigated was inadequate to draw any firm conclusions (they didn’t include staff, surfaces, or visitors). I concluded that ‘the next frontier of transmission mapping must be a more comprehensive evaluation of other potential sources…’. The authors must have been reading, because this study from the same group was published recently in Lancet ID, which is a more comprehensive evaluation of other potential sources.
A little while ago I blogged about the excellent study from Nottingham that demonstrated significant VRE and MRSA contamination on socks used to prevent falls in the hospitalised elderly. This has been followed by another paper suggesting that shoe coverings undurprisingly become contaminated. So, what? How does this really impact on transmission? A new study from Curtis Donskey’s group has looked at hand contamination in patients directly relating to floor contamination. Continue reading
The use of PPE and the protection of HCWs against highly infectious diseases was (and is) a topic of major importance, around the globe. The recent Cochrane review by Verbeek et al. was probably hoping to offer this “vital” information.
Unfortunately, they found no studies on the effects of goggles, face shields, long-sleeved gloves or taping on the risk of contamination. All they found was very low quality evidence, with high risk of bias and uncertain estimates of effect, that:
- More breathable types of PPE offer more comfort without increasing the risk of contamination
- Double gloving and CDC doffing guidance appear to decrease the risk of contamination, and
- Active more than passive training in PPE use may reduce PPE and doffing errors.
Their conclusions are obvious: we need high-quality studies of the materials, their use and protective effects, safe ways of doffing, and the most adequate training to achieve safe use of PPE for HCWs in the presence of highly infectious diseases or those (even less infectious) that may cause severe harm to HCWs.
But what to do until than? My personal opinion is that we should only use PPE, we are used to and know how to use. First-time users, even if supplied with the best available products, will inevitably fail to remove the PPE without error. Consequently, institutions should have a stable selection of PPE, and in the case of preventing highly infectious diseases, a selected group of HCWs with continuous active training, as it is too late to start when the next epidemic is hitting our healthcare centers.
Ana M. Correia and colleagues (N Engl J Med 374;5 February 4, 2016) present a convincing case of person-to-person transmission of Legionnaires’ disease between son and mother. Seen the epidemiology of the two cases and the results of whole-genome sequencing, the only part of the short report I do not understand is the “probable” in the title. I wouldn’t know what else to include in order to call it “proven”.
Consequently, the question is whether this “new” transmission route has implication for infection control in the hospital setting. The mother had very close contact over an extended amount of hours with her severely coughing son, in a small and badly ventilated room. In opposite to HCWs who in this situation generally would wear a mask, she obviously used no personal protective equipment. Finally, while described as formerly healthy, no further details are given about the conditions possibly increasing the susceptibility of the 74-year old to Legionella.
Thus, while person-of-person transmission seems proven in the present case, I believe that the circumstances are unique and don’t require to change the present infection control measures taken in patients with Legionnaires disease.