Thank you, honourable Chair, as well as the members of the committee.
First, I'd like to start off by congratulating you on your foresight in dedicating at least four meetings to this incredibly important topic.
I'm actually going to start with something of an anecdote. In 2012, there was an incredibly interesting paper published by a team of U.S. and Canadian researchers. They tested antimicrobial resistance in 93 bacterial isolates that were obtained in some of the most isolated areas in the Lechuguilla Cave system in New Mexico. This cave system had been closed off to the outside world for four million years before its discovery in 1986, and it was kept free of human contact in the decades thereafter.
Despite the fact that there was no reasonable way in which one would anticipate modern antimicrobial use to be affecting the floor of the cave, when they tested the samples against 26 modern antibiotics, they found that there was at least some degree of resistance, and in some cases, up to 100% of isolates were resistant to the majority of these antibiotics. It turns out that for bacteria, resistance is a weapon of war they've been using in an interspecies war that's been going on for millions of years, and we've really only been in the game for the last hundred.
In the middle of the 20th century, we had, through breakneck speed, developed multiple new classes and multiple new agents of antibiotics, particularly between 1940 and 1970. Within two to four years of antibiotic introduction, we were starting to see reports of drug-resistant isolates popping up again and again. It didn't seem like a problem at the time because we were keeping ahead of the curve, but things have slowed down substantially in the last 55 years.
Clearly, developing new antimicrobial therapies is absolutely key. However, we also need to be able to shepherd the ones that we already have. We need measures that slow down the emergence of new resistance mechanisms, and we need measures in place to prevent the transmission from one patient to another. These are the fields of antimicrobial stewardship, and infection prevention and control.
Stewardship, or ASP, is predicated on consistent evidence that usage is linked to the development of resistance. ASP activities address resistance by promoting judicious use of antimicrobials and a shorter duration of therapy, and by de-escalating or otherwise optimizing the spectrum of activity.
ASP is a growing field, and there are several critical gaps in our understanding of best ASP practices. I have to say that—much as with infection control, which is my speciality—ASP studies tend to be small and methodologically heterogeneous to the point that, in the December 2024 WHO priorities for antimicrobial resistance research, the number one ranked priority was related to ASP.
Infection prevention and control aims to reduce the transmission of various infectious diseases, including antimicrobial-resistant ones, from one patient to another in various health care and congregate living settings. The IPAC approach to AMR includes broadly acting measures, like hand hygiene and environmental cleaning, as well as specific measures, such as identification and contact precautions for patients who are colonized.
Similar to ASP literature, our literature, unfortunately, is fairly small and of heterogeneous quality. Key knowledge gaps lie, for example, in the very detailed space of best practices for multimodal interventions. This is also reflected in WHO's research priorities.
Interventions in ASP and IPAC are very complex, very granular, and they're often quite specific to time, place and patient population. For example, an ASP recommendation on the appropriate choice of antibiotic for a skin infection would be very different in a busy emergency room in Vancouver from what it would be in a family medicine clinic in the Saguenay. An organism-specific IPAC surveillance procedure would be very different in a bone marrow transplant inpatient unit from what it would be in a pediatrician's office.
Furthermore, ASP and IPAC both need to take into account disparate considerations that aren't really part of our clinical training. Those are things like group psychology, adult learning, budgetary considerations and logistics. ASP teams and infection control professionals have had to build these skills through a lifetime of experience within their organizations. They've developed true subject matter expertise in these, but again, there is a gap in being able to share best practices from one organization to the next.
This is widest in crucial sectors, such as community hospitals, long-term care facilities and outpatient clinics. ASP and IPAC subject matter experts in these sectors tend to be disconnected from the funding and methodological support that is available to practitioners in larger academic hospitals.
This is where, in addition to many of the excellent suggestions you've heard over the last hour and a half, I want to make a very specific suggestion to this committee—look to possibilities to promote scientifically sound research coming from this grassroots level.
One readily achievable idea would be a carve-out of CIHR funding for small-cap grants of $100,000 or less for people who are not in academic centres to work on best practices in antimicrobial stewardship and infection control.
A more ambitious idea would be creating networks and linkages—