Maryn McKenna

Journalist and Author

Flu Infections and MRSA Deaths in Maryland

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Sad news out of Maryland, and a reminder of how devastating MRSA, methicillin-resistant Staphylococcus aureus, can be when it combines with flu infection. According to the Maryland Department of Health and Mental Hygiene, the Washington Post and ProMED, five members of a family have fallen ill and three have died from MRSA pneumonia that took hold in lungs inflamed by flu infection.

The dead are Ruth Blake, 81, and her children Lowell, 58, and Vanessa, 56. Another child, Elaine, also fell ill and was hospitalized, and Ruth Blake’s sister has been hospitalized also. They had all contracted one of the seasonal flu strains circulating this year: H3N2. According to the Post, Ruth Blake was vaccinated against flu this season; her children were not. The assumption is that both flu and MRSA spread from the mother to the children.

[Read more…]

From 1918 Autopsy, A First Glimpse of Sickle Cell — and a Warning

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This is just amazing.

Ninety-two years and a few months ago, a US Army private died at what is now called Fort Riley, Kansas. It was July 1918, and the 21-year-old recruit had been sick for two days with a fever and a headache, an aching chest and a hard, hacking cough that didn’t bring anything up. He was admitted to the base infirmary, where they found his temperature was a scorching 105.4 degrees and his entire right lung was not functioning properly. He was diagnosed with pneumonia.

It was 10 years before Alexander Fleming would find the mold that produced penicillin, the first antibiotic, on a contaminated culture plate in his laboratory, and 25 years before World War II service-members would benefit from the compound. The medical staff at Fort Riley had almost nothing to offer the private except a primitive immunotherapy: serum refined from the blood of earlier victims of streptococcal pneumonia. It did nothing for him. He died on July 20, nine days after being admitted.

Because he was a member of the armed forces, the base hospital followed a directive that dated back to U.S. Surgeon General William Hammond in 1862: They performed an autopsy on his body, and recorded and preserved the results. Their diagnosis had been right: His lung tissue was positive for S. pneumoniae. But the damage done to his body by the infection and his immune system’s response to it was dramatic: The middle and lower lobes of his right lung, and both kidneys and his spleen, were inflamed and necrotic and speckled with hemorrhages.

In accordance with Hammond’s Civil War order, the medical staff wrote up the autopsy findings and preserved snips of the soldier’s tissues in blocks of paraffin, and sent them all to a repository that Hammond had ordered created: the Army Medical Museum, later called the Armed Forces Institute of Pathology, in the northwest corner of Washington, D.C. And there they sat, among many thousands of other records and samples, until a member of the institute’s staff delved into its archives 80 years after the soldier’s death.

[Read more…]

Once again, flu and bacterial co-infection

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With the H1N1 pandemic trending down, it may seem that the question of how much bacterial co-infection affects the outcome of flu is less important than it was. But though the pandemic is subsiding — for ever, for this season, or just until a third wave, who can say — researchers are just now getting enough good data to be able to make solid observations about what happened during the past 10 months.

Case in point: Writing in the journal Public Library of Science (PLoS) ONE, a team of researchers from Australia has pinpointed the incidence of MRSA co-infection during flu in two hospitals in Perth last summer, which was the Australian winter and the height of their flu season. Of 252 patients admitted for H1N1 infection, 3 were identified during treatment as having MRSA pneumonia. They survived, but two other patients who died were found to have MRSA pneumonia during post-mortem exams. [Read more…]

NEJM: Antibiotics for pneumonia in H1N1

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The New England Journal of Medicine has been running an open-access blog on H1N1 flu, and they’ve put up a post on when to give antibiotics to prevent secondary bacterial pneumonia, including MRSA pneumonia, in flu patients.

There’s a table of key clinical points to consider, and these important points are made:

For the child or adult admitted to a hospital intensive care unit in respiratory distress, we believe that empirical initial therapy with broad-spectrum antibiotics to include coverage for MRSA, as well as Streptococcus pneumoniae and other common respiratory pathogens, is appropriate.
For the previously healthy child or adult with influenza who requires admission to a community hospital and has features that suggest a secondary pneumonia (Table 1), we would recommend empirical treatment with a drug such as intravenous second- or third-generation cephalosporin, after an effort has been made to prove the association with influenza and to get adequate lower respiratory tract specimens for Gram’s stain and bacterial culture.
If the Gram’s stain suggests the presence of staphylococci or if there is a rapidly progressive or necrotizing pneumonia, an additional antimicrobial agent to cover MRSA is appropriate. …
We do not believe that initial coverage for MRSA is indicated in all patients who are thought to have secondary bacterial pneumonia.

So, to recap:

  • Development of apparent pneumonia in the presence of flu should be met with antibiotics that will treat drug-sensitive bacteria, along with a test to show which bacteria are causing the illness.
  • If staph is present (or the pneumonia appears very serious), then the antibiotics should be upped to one that can control MRSA.
  • But if the pneumonia is serious enough to send a patient straight to the ICU, then drugs that can quell MRSA should be started right away.

For anyone concerned about pneumonia in the aftermath of H1N1, this is worth bookmarking.

CDC warns of deaths from H1N1 flu + bacterial infections

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Over at CIDRAP, my colleague Lisa Schnirring writes tonight about the CDC’s concern over increasing numbers of deaths from bacterial pneumonia in people who have come down with H1N1 flu.

We’ve talked about this before here. Our concern of course has been MRSA, and there is good evidence that there have been fatal MRSA infections in flu victims. But the primary culprit now is not MRSA but pneumococcus (S. pneumoniae):

Anne Schuchat, MD, director of the CDC’s National Center for Immunization and Respiratory Diseases, told reporters at a press briefing that the CDC is seeing an increasing number of invasive pneumococcal disease cases around the country, but the numbers were particularly high in Denver at a time when pandemic H1N1 activity was peaking in the area.
Over the past 5 years the Denver area averaged 20 pneumococcal disease cases in October, but this year the area recorded 58, and most were in adults between the ages of 20 and 59, many of whom had underlying medical conditions.
Health officials expect to see more pneumococcal disease when seasonal flu circulates, but the infections typically strike people who are older than 65. In past pandemics secondary bacterial pneumonia infections, particularly those involving Streptococcus pneumoniae, frequently contributed to illnesses and deaths.

This is particularly troubling and sad because we have good vaccines for pneumococcus, one for adults and a different one for children. Only, people are not taking them: Uptake is only about 25% in high-risk groups and much lower in the general population, despite urgings from CDC and other health advisory boards.

Perhaps it’s not surprising that people have not heeded advice to get the pneumococcus vaccine as a protection against flu’s worst effects, given that uptake of the flu vaccine itself has been so low. But if you or someone you love is in a high-risk group, it would be a really good idea to rethink that.

It's World Pneumonia Day

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Readers, we talk all the time here about the unexpected and deadly attack of MRSA pneumonia, both on its own and as a sequela of influenza infection. But we should acknowledge that MRSA pneumonia is part of an epidemic of pneumonia, an under-appreciated disease of severe lung inflammation that takes the lives of 2 million children each year around the world.

Today, Nov. 2, has been declared World Pneumonia Day by an enormous coalition of global health organizations that includes UNICEF and Save the Children. (Mis amigos Latinos sabrán que está hoy también Dia de los Muertos. Fitting, no?) From their press release: “Pneumonia takes the lives of more children under 5 than measles, malaria and AIDS combined. The disease takes the life of one child every 15 seconds, and accounts for 20% of all deaths of children under 5 worldwide.”

World Pneumonia Day is being marked by events around the globe (here’s a clickable map) and by the release of a World Health Organization report, the Global Action Plan for Prevention and Control of Pneumonia. The plan has three main goals, aimed at the recourse-poor countries where most pneumonia deaths occur:

  • promote breastfeeding to ensure children’s nutrition and good immune status
  • protect immunity by guaranteeing the distribution in the developing world of the pneumonia vaccines we take for granted in the industrialized world, against Haemophilus influenzae and Strep pneumoniae (pneumococcus)
  • treat children when they need it by making sure that there is adequate, local primary care and — important for our purposes especially — also making sure that antibiotics are used appropriately, but not overused.

The international organization GAVI (formerly known as the Global Alliance for Vaccines and Immunization, now going just by its acronym) has announced plans to immunize 130 million children worldwide against pneumonia and other diseases by 2015.

I want to underline that pneumonia is of interest to us for several reasons: not just because we are concerned for MRSA pneumonia, but also because we are in the midst of the H1N1 pandemic, and as we have talked about before, bacterial infections appear to be playing a role in a significant percentage of the deaths. There is no MRSA vaccine, but there are Hib and pneumo vaccines, which might have prevented some of those deaths. So increasing the administration of pneumonia vaccines could affect the course of this pandemic right now, as well as the fates of children all over the world who have not contracted this flu but will be in danger of bacterial pneumonia in the future.

More evidence of MRSA involvement in H1N1 flu

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When the H1N1 pandemic started at the end of last April, few of the case-patients seemed to have any secondary bacterial infections. This was unusual: In the 3 20th-c pandemics, the only ones for which there are good records, bacterial pneumonias seem to have accounted for a high percentage of illness and death. But H1N1 was unusual in a number of ways, and so health authorities wrote down the lack of bacterial infections as one more quirk of this novel strain.

Comes now the CDC to say that while that may have been the case in the spring, it is not now. In a conference call conducted Monday for doctors, which I covered for CIDRAP, the agency said that out of 77 deaths for which it had excellent autopsy data (a small subset of the deaths so far), 22, or 29%, had some bacterial co-involvement. Among the 22, the leading bacterium was S. pneumoniae (or Pneumococcus), but S. aureus was the second leading cause, with 7 cases, and 5 of those cases were MRSA.

(There is not yet anything online from that call to link to. A transcript is promised, and the CDC reps conducting the call said the data will be out soon in the MMWR. I’ll update when possible.)

In fact, there is an emerging literature on the role of bacterial infections in illness and deaths in this flu, and an emerging consensus that bacterial infections are playing a bigger and more serious role than was thought at first. At the ICAAC meeting two weeks ago (more on that soon), KK Johnson et al of the Women’s and Children’s Hospital of Buffalo, N.Y., along with researchers from two other institutions, described two severe and ultimately fatal infections with H1N1 complicated by community-strain MRSA. The victims were children, a 9-year-old girl and a 15-year-old boy, who arrived at the emergency room several days after being seen for mild flu symptoms. Both children died of necrotizing pneumonia, one 11 days after being hospitalized and one 3 days. Cite (no link available): K.K. Johnson, H. Faden, P. Joshi, J. F. Fasanello, L. J. Hernan, B.P.Fuhrman, R.C.Welliver, J.K. Sharp and J. J. Schentag, “Two Fatal Pediatric Cases of Pandemic H1N1/09 Influenza Complicated by Community-Acquired Methicillin-Resistant Staphylococcus aureus (CA-MRSA),” poster G1-1558a.

Finally, there is one recent paper that is online, and it describes MRSA necrotizing pneumonia plus flu in an adult, not a child. It comes from Hong Kong, from a group that were the first to describe SARS pneumonia and thus have a lot of experience in surfing the early wave sof a pandemic. In this new paper in the Journal of Infection, they describe the death from necrotizing pneumonia of a healthy 42-year-old man who was in the hospital only 48 hours. They believe this is the first H1N1+MRSA death to be recorded in the medical literature, and so they use the opportunity to issue a warning to doctors: If a flu patient arrives with what appears to be secondary pneumonia, drugs that can treat MRSA must be prescribed, or the infection will flourish unchecked and death will result. The cite is: Cheng VCC, et al., Fatal co-infection with swine origin influenza virus A/H1N1 and community-acquired methicillin-resistant Staphylococcus aureus, J Infect (2009), doi:10.1016/j.jinf.2009.08.021.

We’ve been talking since the beginning of this pandemic, and before that, about the unique hazards of MRSA + flu coinfection. (Archive of posts here.) It’s important ot understand that the bacterial pneumonias now being recorded are not only due to MRSA; Pneumococcus is playing a role as well. That is important because, unlike MRSA, we have vaccines against Pneumococcus; in the United States, one vaccine is approved for children and a second related one for adults. With no MRSA vaccine anywhere, and no H1N1 vaccine yet, it is worth considering whether to take a pneumococcal vaccine for additional protection as this pandemic unfolds.

Child deaths from flu + MRSA: CDC confirmation

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Hello again, constant readers. It’s been an exciting few weeks at Casa Superbug. I’ll spare you the details — most of them are both grueling and trivial — but out of the murk, here is a piece of excellent news: SUPERBUG has been edited, revised and sent back to the publisher, who has sent it into production. Yes, it’s actually beginning to become a book. There are many more steps to go, but it it is finally, really on its way.

Meanwhile, there is a ton of MRSA news to catch up on, which I will roll out over the next week or so. First: For those of you who don’t read the CDC’s weekly bulletin (called the MMWR, for Morbidity and Mortality Weekly Report. It’s the best-read magazine you’ve never heard of. It’s free. Go already), there was an important and disturbing report last Friday, reporting the case details of children who have died from H1N1 flu.

As of August 8, the CDC said, 477 people had died in the US from H1N1, and 36 of them were children and teenagers. Out of those 36:

  • 7 were younger than 5
  • 24 had at least one high-risk medical condition, many of them neurological (developmental delay, cerebral palsy) or pulmonary; 12, or one-third, did not
  • 23 had some pathologic analysis done during their illness or after their deaths
  • 10 had bacterial co-infections
  • of those 10, 5 had staph infections
  • 3 of the staph infections were MRSA.

Let’s bring the first and last terms of that equation together: 36 children; 3 known MRSA infections. Though it could be an underestimate (because 13 children had no pathology done), that is a non-trivial 8%.

The report splits the data on the child deaths a number of different ways, and reveals details that are important to note. Six of the bacterial infections (four staph) were in children older than 5 who did not have any underlying conditions; they were healthy, normal kids before developing flu. Of the 7 kids younger than 5, 2 had a bacterial infection; again, neither child had a high-risk condition.

How worrisome are these numbers? It’s hard to say with precision, but they are certainly not good news. The CDC has only been counting child deaths from flu for a few years, and the totals they have come up with are very variable: 153 in 2003-04, 47 in 2004-05, 46 in 2005-06 and 73 in 2006-07. But, important point: Those deaths were during the regular flu season, which goes from roughly October to March. These new deaths occurred between late April and early August, when there is not supposed to be any flu. What this will mean for this fall and winter, when H1N1 will still be around, and may co-circulate with seasonal flu, no one yet can say.

For our purposes, the most important point is that lethal MRSA co-infections are now confirmed to be happening in the setting of H1N1 flu. And, as the CDC paper notes, these infections happened in children who would not have been expected to have a tough course, because they had no underlying high-risk conditions:

This report also highlights the prominence of laboratory-confirmed bacterial coinfections, which were identified in 10 (43%) of the 23 children who had culture or pathology results reported. All six children who were aged ≥5 years, did not have a high-risk medical condition, and had culture or pathology results reported had an invasive bacterial coinfection, suggesting that bacterial infection, in combination with 2009 pandemic influenza A (H1N1) virus infection, can result in severe disease in children who might be otherwise healthy. Clinicians should be aware of the potential for severe bacterial coinfections among children diagnosed with influenza and treat accordingly.

Obviously those of us who are concerned about MRSA and the potential for MRSA pneumonia alongside flu have been worried about this (long archive of posts here). If there is any good news in the sad saga of these deaths, it is that the CDC has confirmed that MRSA pneumonia in H1N1 flu is a real and dangerous possibility.

So if you are concerned about this, first, bookmark the MMWR report, because it will be something to show to a physician if necessary. And second, keep in mind the potential for pneumonia if you have a young child who contracts H1N1. I am not suggesting being alarmist; if H1N1 circulates widely, doctors and ERs will be overwhelmed, and we should try not to add to their case load unless really necessary.

But on the other hand, if a child has chest pain or breathing difficulty, don’t hold back. There are online tools such as this one by Children’s Healthcare of Atlanta that can help a worried parent assess whether and when a child with flu should be taken to the ER. If you click through its steps, you’ll see that breathing difficulties and the possibility of pneumonia are things that it takes seriously, and so should we.

Another death from H1N1 flu + MRSA

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Thanks to a commenter who alerted me to this sad story: A teenager in Austin died of a combination of H1N1 flu and MRSA pneumonia. Constant readers will know that we have been watching for this for a while; MRSA pneumonia is a known and dangerous complication of any flu infection.

For stories for CIDRAP and the Annals of Emergency Medicine, I’ve been talking to ER physicians about their expectations for the fall, when the regular flu season begins and H1N1 is expected to intensify. (A friend’s school already has cases circulating.) It’s fair to say that emergency departments are unsettled about the possibility of severe complications from this flu.