Clostridium difficile infection historical perspective
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [2]
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Notable outbreaks
On June 4, 2004, two outbreaks of a highly virulent strain of this bacterium were reported in Montreal, Quebec and Calgary, Alberta, in Canada. Sources put the death count as low as 36 and as high as 89, with approximately 1,400 cases in 2003 and within the first few months of 2004. C. difficile infections continued to be a problem in the Quebec health care system in late 2004. As of March 2005, it had spread into the Toronto, Ontario area, hospitalizing 10 people. One died while the others were being discharged.
A similar outbreak took place at Stoke Mandeville Hospital in the United Kingdom between 2003 and 2005. The local epidemiology of C. difficile may offer clues on how its spread may relate to the amount of time a patient spends in hospital and/or a rehabilitation center. It also samples institutions' ability to detect increased rates, and their capacity to respond with more aggressive hand washing campaigns, quarantine methods, and availability of yoghurt to patients at risk for infection.
It has been suggested that both the Canadian and English outbreaks were related to the seemingly more virulent 027 strain of bacterium. This strain has also been implicated in an epidemic at two Dutch hospitals (Harderwijk and Amersfoort, both 2005). A theory for explaining the increased virulence of 027 is that it is a hyperproducer of both toxin A and B, and that certain antibiotics may actually stimulate the bacteria to hyperproduce.
On December 2, 2005, The New England Journal of Medicine, in an article spearheaded by Drs. Vivian Loo, Louise Poirier, and Mark Miller, reported the emergence of a new, highly toxic strain of C. difficile, resistant to fluoroquinolone antibiotics, such as Cipro (ciprofloxacin) and Levaquin (levofloxacin), said to be causing geographically dispersed outbreaks in North America.[1] The Centers for Disease Control in Atlanta has also warned of the emergence of an epidemic strain with increased virulence, antibiotic resistance, or both.[2]
As one analyzes the pool of patients with the spores, many who are asymptomatic will pass the organism to individuals who are immunocompromised and hence, susceptible to increasing rates of diarrhea and poor outcome. It seems notable that the clusters described above represent a challenge to epidemiologists trying to understand how the illness spreads via the convergence of information technology with clinical surveillance.
On October 1, 2006, the bacteria was said to have killed at least 49 people at hospitals in Leicester, England over eight months, according to a National Health Service investigation. Another 29 similar cases were investigated by coroners.[3] A UK Department of Health memo leaked shortly afterwards revealed significant concern in government about the bacterium, described as being "endemic throughout the health service"[4]
On October 27, 2006, the bacteria was attributed to 9 deaths in Quebec, Canada.[5]
On November 18th, 2006, the bacteria was reported to have been responsible for 12 deaths in Quebec, Canada. This 12th reported death was only two days after the St. Hyacinthe's Honoré Mercier announced that the outbreak was under control. 31 patients were diagnosed with Clostridium difficile and four (as of Sat. Nov 18th) were still under observation. Cleaning crews took measures in an attempt to clear the outbreak.[6]
On February 27, 2007, a new outbreak was identified at Trillium Health Centre in Mississauga Ontario, where 14 people were diagnosed with the bacteria. The bacteria was the same strain as the one in Quebec. Officials have not been able to determine if C. difficile was responsible for deaths of four patients over the prior two months.[7]
In October 2007, Maidstone and Tunbridge Wells NHS Trust was heavily criticized by the Healthcare Commission regarding its handling of a major outbreak of C. difficile in its hospitals in Kent from April 2004 to September 2006. In its report, the Commission estimated that about 90 patients "definitely or probably" died as a result of the infection. [8][9]
References
- ↑ Loo V, Poirier L, Miller M, Oughton M, Libman M, Michaud S, Bourgault A, Nguyen T, Frenette C, Kelly M, Vibien A, Brassard P, Fenn S, Dewar K, Hudson T, Horn R, René P, Monczak Y, Dascal A (2005). "A predominantly clonal multi-institutional outbreak of Clostridium difficile-associated diarrhea with high morbidity and mortality". N Engl J Med. 353 (23): 2442–9. PMID 16322602.
- ↑ McDonald L (2005). "Clostridium difficile: responding to a new threat from an old enemy" (PDF). Infect Control Hosp Epidemiol. 26 (8): 672–5. PMID 16156321.
- ↑ Trust confirms 49 superbug deaths - BBC News
- ↑ Nigel Hawkes (11th January 2007). "Leaked memo reveals that targets to beat MRSA will not be met". The Times. Retrieved 2007-01-11. Check date values in:
|date=(help) - ↑ "C. difficile blamed for 9 death in hospital near Montreal". cNews. 11th January 200. Retrieved 2007-01-11. Check date values in:
|date=(help) - ↑ 12th person dies of C. difficile at Quebec hospital - CBC News
- ↑ [1]
- ↑ Healthcare Commission press release: Healthcare watchdog finds significant failings in infection control at Maidstone and Tunbridge Wells NHS Trust, 11 October 2007
- ↑ Daily Telegraph, Health Secretary intervenes in superbug row, 11 October 2007