David's New Book

Thursday, May 2, 2019

Antibiotics, Investors, Where we Go from Here

What do investors think about antibiotics companies?  Not much. Paratek, at a price of just $5.42 has a 36% short ratio.  That is, 36% of is tradable shares are being shorted by skeptical investors. Market caps under $200 million do not bold well either. Melinta is selling four antibiotics – they made $96 million in total revenue in 2018. Anyone who doubts that the antibiotic market is broken need only ask the investors.

As I noted in my previous blog, it is unlikely that we will see a significant pull incentive this year. Investors, I’m told, prefer a direct reimbursement above the DRG for expensive new antibiotics as described in the DISARM act of 2018. But hospitals may well balk at being reimbursed for an expensive product they may not use. I’m not sure the investors have asked the hospitals what they think. In the UK, meanwhile, they are still considering the added value of antibiotics to their healthcare system. But, it seems, they have already decided on a value or on the price of a market entry reward, or whatever pull incentive they may or may not apply.  I first heard this number from folks at Wellcome last fall – £50 million. By strange coincidence, in the recent opinion piece by Jeremy Farrar of the Wellcome Trust, he notes that the fair share for the UK of a $1billion reward would be 5% or $50million (that’s even less than £50million).First – I believe a more workable number for a market entry reward is $2 billion, especially if we want to attract large pharma and investors back into the space. Secondly, I’m not sure that a $50 million contribution by the UK would be considered a good thing by investors – that small a number might even be a disincentive. The only way that approach will work is if 20-40 other countries join in – a scenario that seems hardly likely. This approach seems less like leadership and more like something else.

On a possibly brighter note, the WHO recently released a report on the antibiotic resistance crisis. One key conclusion was –

Additional effort, investments and incentives are needed to spur innovation in antimicrobial medicines, diagnostics, vaccines, waste management tools, safe and effective alternatives to antimicrobials and alternative practices, as well as operational and implementation research, in human, animal and plant health. 

In typical WHO fashion, this leaves much to be desired in terms of providing for a significant global pull incentive for antibiotic R&D. 

All of this gets me back to where I was in my last blog. What can we do while we wait for someone to lead with a significant pull incentive?  We lobby the Infectious Diseases Society of America (IDSA) do its job! I’m sorry – but the current situation is simply unacceptable to me as an infectious diseases physician. I just reviewed the IDSA/American Thoracic Society guidelines on treatment of ventilator-associated and hospital-acquired pneumonia. These are remarkably well thought out with a great deal of literature research for the year of their publication -2016.  But much has changed since then.  Would the IDSA/ATS still stand by their statement that “We did not identify any RCTs assessing colistin as empiric therapy for VAP, but a systematic review and meta-regression of observational studies comparing colistin to other antibiotics found no differences in clinical response rates, mortality, or nephrotoxicity [184]?”  (Personally, I have instructed my family to threaten any physician contemplating treating me with colistin/polymyxin with a malpractice suit!)

I worked on guidance from IDSA and the Society for Health Care Epidemiology in the 1990s. The guidance appeared three years after we started our work and was not updated for 10 years. Of course, I like to think our guidance document was so far-sighted that it did not need updating – but that’s just me.  The bureaucratic wheels grind slowly, especially when there are two different organizations trying to get things approved and published. I think the Societies need to find a way to respond to rapidly changing data to update physicians in a real-time way with updated guidance. This would go a long way to alter physician behavior and get our patients the right antibiotics when they need them most.  It would also spur hospitals to have the right antibiotics on their formularies and, in consequence, would provide one step towards improving the antibiotic marketplace. 

Monday, April 15, 2019

Pull Incentives - Don't Hold Your Breath!

Months ago, long before the 2018 election, I was led to believe that Senate candidate Jackie Rosen of Nevada was seriously interested in working to solve the broken antibiotics market.  In the months before the election and since then I have been speaking to the now Senator’s staff about this issue.  I have sent them articles, documents, studies, and links to information on the internet. This week I learned that while the Senator is interested in learning about the problem, she is not ready to lead on the issue.  She has not even seriously approached her colleagues in the Senate or the House on the subject. She is interested in making sure that the NIH has enough funding for antibiotic research. But as we all know, we can fund all the research we want, but without a market, it could be like flushing the money away. 

My own congressional representative, Joe Courtney, has never said he would support pull incentives for antibiotic R&D. He is most interested in reducing drug prices. 

I had planned on a visit to Washington, DC this week to speak to staffers on this issue. But I now realize that this would be a waste of my time and theirs. 

In both these cases, reading between the lines, I feel that the prospect of providing financial support to the greedy pharmaceutical industry is anathematic. It seems like no one in Washington is willing to look beyond an upfront investment in such an incentive in order to realize future cost savings.  This is like supporting prices for vaccines that have shown that they provide a ten-fold return on such an investment. We already accomplish that by reimbursing for many vaccines especially for children – see this National Academies Report. Many studies show that inappropriate antibiotic therapy given usually because of unsuspected resistance costs lives. Having the right antibiotics available to physicians and patients would clearly be a life-saving, and therefore, a cost-saving benefit. Why can’t we make this investment in our future and that of generations to come?

There is a new DISARM bill in the Senate. This bill would provide for reimbursement to hospitals for the use of expensive antibiotics active against resistant infection above and beyond the medicare diagnostic related grouping payment. While this is a step forward, its just a baby step. The problem is that it is reimbursement. Hospitals would still have to actually stock the new and expensive antibiotics in case they should see such a resistant infection, even if their usual incidence of such infections is low. That means they have to pay an upfront cost and may not be reimbursed if they do not use the drug. We also must remember that 70% of US hospitals are under 200 beds and 55% are under 100 beds.  That is, most hospitals in the US are small community hospitals. They will be reluctant to take on these upfront costs. Most people I have spoken with only give this bill a 50/50 chance of passage – and its really a baby step.

If we are not likely to see a significant pull incentive in the US (or anywhere else) this year, a likely outcome, where can we go next? There are two actions we can take that will help. 

The first step is for the Infectious Diseases Society of America and perhaps the American Thoracic Society to provide clear clinical guidance that makes the use of colistin and polymyxin a practice of the past except in cases where there really is absolutely no other choice.  The availability of new antibiotics like ceftazidime-avibactam, ceftolozane-tazobactam, meropenem-vaborbactam and plazomicin should all be prioritized over colistin/polymyxin for the treatment of Gram-negative infections where resistance is suspected or documented. Recent US data from Alan Carr on the use of Dificid for C. difficile diarrhea shows that guidance can make a huge difference in use (above). Compare that to the use of newer antibiotics for the treatment of carbapenem-resistant Gram-negative infections from the same report (below). 

The second action item for us is to be sure that we can begin testing the susceptibility of pathogens to new antibiotics when the drugs come to market.  Currently there is a one to several year delay that results in a delay in these new agents being used for treatment when they should be the drugs of first choice. This delay is mostly because of the way commercial susceptibility testing device companies run their business. This will be the subject of an entire blog in the near future. 

If you were hoping for a significant pull incentive for antibiotic R&D this year, my advice is – don’t hold your breath. We need to turn our attention to insisting on new clinical guidance from the clinical organizations and thought leaders that relegates colisitin/polymyxin to the past.  And we must hold the feet of the susceptibility testing device manufacturers to the fire and eliminate long delays between the launch of new antibiotics onto the marketplace and our ability to test pathogens to see if they are susceptible to treatment with these new agents. (This does not mean you should stop cajoling your representatives to pass pull incentive legislation). 

Friday, March 29, 2019

Non-Traditional Antibacterials

We had our webinar-Clinical development for non-developers Part 3: Non-traditional Approaches yesterday.  I encourage everyone interested in this topic to listen.  I moderated, but the front line participants were 

Sumathi Nambiar
Director, Division of Anti-Infective Products
Office of Antimicrobial Products, CDER, FDA
Mair Powell
Senior Clinical Assessor
Health Products Regulatory Authority (Ireland) 
Ian Friedland
Clinical consultant
Friedland Strategic Consulting, LLC.

You couldn’t have a more authoritative and experienced set of presenters. 

What are “non-traditional” antibacterials? Based on our discussion yesterday, I think its better to think about what the products will do and how they will be developed.  Any protein, antibody, peptide, bacteriophage cocktail or other that can be developed and used as a stand-alone therapy can be studied clinically in a traditional indication such as ventilator-associated pneumonia, urinary tract infection, etc., using a non-inferiority trial design. This is by far the lowest risk way to proceed to demonstrate efficacy.  For these products, CMC and safety studies that will be required are quite different than those required for small molecules. 

For those products that cannot be studied as stand-alone antibacterials, such as inhibitors of virulence, critical but non-essential bacterial functions such as RecA for example, immunomodulators that might target host functions, therapies directed at the microbiome and others are more challenging to develop. One main problem will be coming up with a rationale to justify dose selection. Will you be able to use standard animal models of infection to carry out PK/PD studies to justify dose or not?  If not, you may need to carry out dose ranging trials in the clinic before proceeding to pivotal trials. A second major decision will be to determine whether the drug will be developed as part of a fixed-dose combination with a known antibiotic or whether it will be adjunctive therapy to standard of care. If it will be developed as a fixed-dose combination, you will need a strong rationale showing a dramatic effect of the new drug on its partner’s activity to justify this approach. If it will be developed as adjunctive therapy to standard-of-care, you will ultimately need to carry out superiority trials. In the latter case, the challenge to show superiority will be a significant one and not one to be undertaken lightly. 

In thinking about this, I have come to understand that there is also another issue – one that John Rex has mentioned frequently. That is, the value proposition. Regulatory requirements to achieve market approval are one set of challenges. But a plan to show the value of the new product to patients, physicians, payers and investors is another.  I think of this as a Venn diagram.  Demonstrating the value of the product to this important group of stakeholders is as important as obtaining market approval from the regulators. While non-inferiority trials for these products (when developed as fixed dose combinations) may allow for regulatory approval, they may not be sufficient to fulfil a value proposition.  Positive data from superiority trials are more likely to fulfil a value proposition, but the chance of success in these trials as currently envisioned is low.

Everyone participating in the webinar agreed that this is new territory. We do not have any real experience in developing or using non-stand-alone products like these. From the regulatory point of view, much will have to be decided on a case-by-case basis until we get a better understanding of how to develop these products. The regulators on both sides of the Atlantic are willing and even eager to hear from sponsors delving into this area.  They are open to listening to project proposals and providing advice even at the earliest stages of scientific investigation. I would encourage those of you working in this area to take advantage of this possibility before investing significant resources in product development. 

Dr. Nambiar has provided a number of links in her presentation materials to prior FDA workshops and advisory committee meetings that have examined this and related areas.

A few bottom line items from the webinar, at least for me, are:

Non-traditional products that cannot be stand-alone therapy remain a very high-risk endeavour. 
Any company working in this area should have a portfolio of projects that spread risk across more than one approach.
Have a Target Product Profile that is developed based on medical need and on a value proposition. Use experienced clinicians and scientists here. 
Speak to regulators early on about CMC, safety and efficacy.

Tuesday, March 12, 2019

Regulatory Conundrums

In the absence of any real news on the pull incentive front, I want to turn my attention to the regulatory side of antibiotic development. Before we get started, I want to express my thanks to John Rex who provided useful contributions to this blog.

 As I have been saying for years, for most new antibiotics, regulatory requirements are not a limiting factor. If a new antibiotic has a relatively broad spectrum or is specifically active against a very common pathogen such as Staphylococcus aureus or Neisseria gonorrhea, there are clear and feasible regulatory pathways allowing for development and approval on both sides of the Atlantic and globally. 

The remaining regulatory difficulty comes if you are trying to develop a product that is specific for a relatively uncommon or rare pathogen such as Pseudomonas aeruginosa or Acinetobacter baumannii. I have written about this previously and there have been many FDA meetings and workshops where this issue has been discussed. The conundrum as noted by Dr. Rex, is that patients, clinicians, payers and yes, regulators all want a statistically powered trial. But for these rare infections, it remains unclear that such a trial is feasible. 

Another workshop, this time to discuss the development of products for non-tuberculous mycobacterial infections, will occur on April 8.  The issue for this entire area revolves around the design of clinical trials where the enrollable population is small.  In these instances, enrolling a large, non-inferiority trial may simply be impossible or may take many years. Both FDA and EMA have struggled to provide guidance dealing with this problem. Both continue to reject the use of external or historical controls. These controls have their problems but could significantly cut the number of patients one would have to study in an active trial. 

There are at least two pathogen-specific antibiotics currently in Phase 3 trials. Murepavadin is an anti-pseudomonal drug being developed by Polyphor.  They are carrying out trails in hospital-acquired and ventilator-associated pneumonia. About 15-20% of these infections are caused by Pseudomonas. They plan to enroll about 250 patients in each of two non-inferiority trials. The feasibility of this approach remains to be seen. Entasis is studying a combination of a B-lactamase inhibitor with sulbactam for the treatment of urinary tract infection caused by Acinetobacter. In the latter case, in a phase 2 trial, patients received ExtSul plus imipenem.  Of 80 patients, 8 had imipenem-resistant isolates.  Will they be able to recruit enough of these patients and show enough of a difference in efficacy to gain approval? 

John Rex notes that, on the one hand, we do not want to have so many resistant infections that the Entasis trial enrolls easily.  On the other hand, we want to be able to approve and market drugs such as the one under study by Entasis. This topic is full of paradoxes. 

Many of the more innovative approaches currently being pursued are non-traditional in nature. These include anti-virulence, lysins, immunomodulators, bacteriophage and other targets.  Many of the resulting products will also be specific for certain uncommon pathogens. As John Rex often points out, all these approaches, traditional or not, must show to patients, clinicians and to regulators that the product under study has value to patients with unmet medical needs. Designing acceptable clinical trials that will accomplish this, especially for those products that will provide adjunctive therapy is, to say the least, challenging. 

Further, the FDA and EMA have rather divergent approaches to this topic. EMA, for example, has just published a new addendum for the development of antibacterials. They make it clear that they expect randomized clinical trial data.  Helpfully, EMA notes that the size of the data package will be based on trial feasibility including the required length of time for enrollment.  But this may conflict with criteria that FDA is using to determine trial size and makes one question the kind of statistical information EMA is willing to accept. EMA also notes that it does not consider bacteremia outside of well-documented secondary bacteremia, a clinical indication or even a disease. FDA, however, has accepted bacteremia in recent submissions. 

These apparent conflicting approaches simply signify that neither we as developers nor the regulators have come to any consensus on how to deal with antibacterial drugs targeting infections where the patient population is small.  But in order to move forward with the innovative products that are now being researched, this is a problem we must all work harder to solve. 

I am going to suggest that, as part of any legislation providing for a significant pull incentive, we insist on the inclusion of a mandate for FDA to identify feasible development pathways for products targeting small populations. Many of us thought this was already accomplished with the LPAD guidance from FDA – but in fact the guidance specifically states that there must be “substantial evidence of effectiveness.” This seems to virtually preclude small trial designs that might be feasible.

Obviously, we all have a great deal more work to do to make the global development of antibacterial drugs specific for uncommon or rare infections feasible. 

NOTE - To clarify - both FDA and EMA allow the study of bloodstream infections for products meeting an unmet medical need.  But, the label indication will not include "bacteremia" as I currently understand how this works. 

Monday, February 11, 2019

Antibiotics - Play or Pay?

In my last blog I discussed the potential pull incentive proposed in the UK Plan to tackle antimicrobial resistance.  One of the other proposals in the plan was to implement a play or pay policy for companies actively engaged or not in antibiotic research and development. This idea was touted both by Jim O’Neill in the AMR Review and in his recent GARDP blog. I should point out that this is an old idea first proposed (as far as I know) by Dr. Lou Rice at an ICAAC meeting back in 2004.  The idea was not included in the 2004 white paper from the Infectious Diseases Society of America, Bad Bugs No Drugs (no longer available on the IDSA website).  Dr. Rice’s motivation was, in part, related to the marketing of antibiotics by industry that he felt may have helped to foster abuse and, ultimately, increasing resistance.   Play or pay was designed as an incentive for companies to engage or to continue to be engaged in antibiotic discovery and development and as a disincentive for disengagement. The proposal occurred at a time when many large pharmaceutical companies had abandoned the area. 

As is true for all of these attractive-sounding ideas, the devil is in the details. I have never understood exactly how such a policy could be implemented (but I’m happy to be enlightened).  

First, how do we define “company?”I assume that we are targeting large pharmaceutical companies to encourage them to re-engage in antibiotic R&D. I would define them as those with annual revenues of $10 billion or more. Allergan and Celgene would now be included in this group. But, one might ask, what about mid-cap companies like Regeneron, Valeant and others?  I am assuming that small companies would be exempt from play or pay.

Secondly, we must define “research” and “development” and decide if companies must carry out both activities to qualify. My view is that both preclinical and clinical research should be required. What domains must the research include?  Is a therapeutic vaccine effort sufficient? Is research on preventative vaccines or therapies OK? My own opinion is that vaccine research would be excluded from play or pay.  We need new therapeutics such as small molecules, peptides, proteins, antibodies and other similar approaches. Where does research end and development begin? Research could be defined as anything prior to, say, phase II clinical development. That way, phase I trials would be part of discovery research. If companies were allowed to just claim development activities for new therapies, Pfizer would qualify. But if pre-clinical research into new therapeutic approaches were required, Pfizer might not qualify. 

Third, how much should they play or pay?   Obviously, this incentive/disincentive has to be large enough that it works as such. One way to do this would be to require that 10% of a company’s total R&D budget be dedicated to antibacterial research and development. Many large pharmaceutical companies spend around $5-6 billion on R&D. Roche spent much more in 2017 (around $11 billion).  Therefore, the required spend on antibacterial R&D would be between $500 million and $1.1 billion in this scenario. The difference between their actual spend on antibacterial R&D and the 10% number would be the required payment. 

What would happen to any monies that came into the treasury based on this scheme?These funds could be used to support antibacterial research in academia and small companies and could be used to support significant pull incentives for new and needed antibiotics.

Where would the money come from?  Ahhhh! It is virtually certain that these costs would pass right back to consumers regardless of how any play or pay policy is implemented. And this takes us back to square one.  Do we want pharmaceutical consumers to pay or do we want to spread the payments for required antibacterial R&D and pull incentives among all taxpayers?  I vote for the latter.

Thursday, January 31, 2019

The UK Plan

The United Kingdom recently released a 5-year and a 20-year plan for combatting antimicrobial resistance.  These are both worth a careful read – especially if you are interested in efforts on stewardship and research support. (I sent several emails to colleagues within and outside the UK querying them on details on the UK plan, but have had no replies.  The workings of the UK team seem to be shrouded in secrecy.)

Buried in the forward to the 5-year plan is this –

We are leading the way in testing solutions that will address our global failure to incentivise the development of new antimicrobials and alternative treatments. We will test a new model that will de-link the payments made to companies from the volumes of antibiotics sold, basing the payment on a NICE led assessment of the value of the medicines and supporting good stewardship.

There is a great deal in that paragraph – most of which I find opaque. The idea of testing solutions to incentivize the development of new approaches to anti-infective therapies comes from the AMR Review headed by Lord O’Neill and recently reiterated in a blog post by him. The idea is to develop a global consortium to assemble the funding required for such a pull incentive. In their 5-year plan, the UK seems to be saying that they will “test” a model based on “value” of a new medicine to the health care of the nation. The first question is, how can one test an incentive that will surely not be an incentive since it will be unlikely to provide for global value to healthcare. The second question is, how will they determine “value.” And finally, where will the money come from?  If the money comes from an already underfunded NHS, how much money can this possibly be? 

What is “value” in this case?  Is it determined by things like decreased mortality, decreased length of hospital stay, decreased time of disability, increased quality life years,  . . . ? If it is any of these, how will that be determined since this is not usually a robust part of our modern non-inferiority trials that are used to approve antibacterial products? Would we then turn to historical data – either contemporary observational studies, NHS data mining or data from the preantibiotic era? We await further information from the UK in this regard. 

The UK population is around 66 million, the US is about 350 million and Europe is close to 500 million. Saying nothing about Asia and Africa, this makes the UK represent less than 8% of the population of the developed world. Let’s say, for argument’s sake, that the value of a new antibiotic on a global scale is on the order of $2 billion.  Would the UK share then be $160 million? Regardless of how this is calculated, the plan by the UK seems to assure that the pull incentive they alone would provide would not be enough to pull anyone anywhere.  

From a more positive perspective, perhaps their plan is to provide a method to determine value and come up for a number that would hypothetically be the UK share of some global incentive.  Then, their idea is to lead the world to a value based incentive where the cost would be shared among nations or regions. I think this is what they mean by “test.” 

This would be a valuable endeavor, but would probably not provide a significant pull incentive within 2019, which is the time frame many experts believe is critical to saving our antibacterial infrastructure and hence our pipeline of new products from oblivion. 

We all agree that an incentive that provides companies for a reasonable return on their investment in anti-infective therapeutics is an absolute requirement at this point. Such an incentive should, logically, to one extent or another, decrease the reliance of companies on price and sales volume and will thus also support good stewardship for these new products. Given the current urgency, I strongly believe that our default position for 2019 is to provide a market entry reward (prize if you like) to be awarded for the approval of a high priority antibiotic (as defined by CDC or WHO) on the basis of a contractual agreement with the company involved to guarantee access, manufacturing and distribution and to decide on pricing etc. Other approaches, such as the one being undertaken by the UK, will take too much time, but could inform the market entry reward at a later time. 

Tuesday, January 22, 2019

Musings on Penicillin - Can we Learn From History?

Lately, I’ve been thinking about new approaches to antibacterial therapy. But I keep going back to some old family history. It was 1944.  My father was completing his internship year in New York City. That summer, he took on additional work as a physician for a childrens’ camp in Connecticut. My aunt, who suffered from type I diabetes, came to visit.  Her parents thought the fresh air and activity would help. Soon after arriving, she developed a staphylococcal breast abscess. My father tried treating her with sulfonamides, but her condition deteriorated rapidly.  She was hospitalized in Manhattan delirious with positive blood cultures. The family gathered, arriving from Chicago, thinking she would not survive. My father knew that penicillin was available for use in our troops fighting overseas and he had heard that the army would supply the drug for emergency use through public health offices around the country.  He called the public health commissioner for the City of New York and was able to obtain penicillin for my aunt.  With intravenous penicillin, she recovered rapidly. She lived another 25 years before succumbing to cardiovascular disease complicating her diabetes.

 During the bad old days of the FDA meltdown (starting around 2000, accelerating in 2006 and reversed by 2012), we used to speculate whether penicillin could even be developed and approved today. I think that for intravenous penicillin in 1945 the answer is a resounding yes.  But for oral penicillin – the answer is maybe. For oral penicillin, what clinical indication could one study?  The requirements to study very severe skin and soft tissue infections might preclude the use of an oral drug.  Clinical trials in pneumonia might work, though. For streptococcal pharyngitis, the FDA guidance has been withdrawn. Then, imagine if we did not know about the frequency of hypersensitivity reactions to penicillins (as we might not have known in 1944-5).  After marketing penicillin we realize that about 1 in 7000 treated patients develop a serious allergic reaction and death occurs in 1 in 67,000 to 1 in 70,000 treated patients (Idsoe O, Guthe T, Sillcox RR, de Weck AL. Nature and extent of penicillin side-reactions with particular reference to fatalities from anaphylactic shock. Bull World Health Organ 1968; 38: 159–88 – see this link).  What would happen then? I presume that intravenous penicillin approved for serious infections would remain approved with some warning label. But oral penicillin would probably be restricted to the treatment of pneumonia and approval withdrawn for other indications. 

One question I have asked my friends at FDA is – how was penicillin approved in 1945?  I don’t yet have a clear answer.   Apparently this information is very hard to find – especially in the midst of our current government shutdown.  But I believe that we will find that the approval of penicillin was based on published papers including experiences such as I described above.  In that case, this is, in part, like approving a drug based on external controls where all clinicians can agree that the treatment effect is very large.  I also think that this is a principle we should consider today for new therapies that have obvious dramatic ameliorative effects in otherwise deadly circumstances.  Case examples can be found among patients treated for severe, antibiotic-resistant  sepsis with custom-designed bacteriophage cocktails (e.g. Development and Use of Personalized Bacteriophage-Based Therapeutic Cocktails To Treat a Patient with a Disseminated Resistant Acinetobacter baumannii Infection. Schooley RT, Biswas B, Gill JJ, Hernandez-Morales A, Lancaster J, Lessor L, Barr JJ, Reed SL, Rohwer F, Benler S, Segall AM, Taplitz R, Smith DM, Kerr K, Kumaraswamy M, Nizet V, Lin L, McCauley MD, Strathdee SA, Benson CA, Pope RK, Leroux BM, Picel AC, Mateczun AJ, Cilwa KE, Regeimbal JM, Estrella LA, Wolfe DM, Henry MS, Quinones J, Salka S, Bishop-Lilly KA, Young R, Hamilton T. Antimicrob Agents Chemother. 2017 Sep 22;61(10). pii: e00954-17. doi: 10.1128/AAC.00954-17 – see this link).  This case example is complicated by the use of concomitant antibiotics and the emergence of bacteriophage resistance during therapy.  And these sorts of complicating issues may also undermine our belief that the miraculous clinical improvement seen in this case was due to the bacteriophage therapy.  Treatment today is so much more complicated that it was in 1944-5. Nevertheless, those taking care of the patient in this example remain convinced that bacteriophage therapy was in large part responsible for this patient’s survival just as my father was sure that penicillin cured my aunt. 

Another observation from my musings is that whatever the new therapy is that we contemplate, its clinical effect must be dramatic and measurable in a way that convinces clinicians (and regulators) that it is a valuable addition to our treatment paradigm. This remains our challenge. Would it also be a challenge for penicillin if it were to be developed today as one of the first antibiotics? 

(I apologize if it seems like these considerations are circular and go on forever - but I thought I would share anyway).