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Volume 5, Number 5—October 1999

Letter

The Cost-Effectiveness of Vaccinating against Lyme Disease

Suggested citation for this article

To the Editor: The recent article by Meltzer and colleagues (1) is an important contribution to a pertinent public health issue: who should receive the newly licensed Lyme disease vaccine. Answering this question is a daunting task, given the scarcity of valid data. Estimates of the spectrum and prevalence of the long-term sequelae of Lyme disease remain controversial (2-4). In generating their cost-effectiveness model, Meltzer et al. examined the cost savings involved in preventing three categories of classic organ-specific Lyme disease sequelae (cardiovascular, neurologic, and arthritic); however, they did not take into account the potential cost savings from preventing cases of a generalized symptom complex known as post-Lyme syndrome, which includes persisting myalgia, arthralgia, headache, fatigue, and neurocognitive deficits. These generalized sequelae, which are recognized by the National Institutes of Health as late sequelae of Lyme disease, have been found to persist for years after antibiotic therapy (5,6). Two population-based retrospective cohort studies (7,8) among Lyme disease patients whose illness was diagnosed in the mid-1980s determined that one third to half had clinically corroborated post-Lyme syndrome symptoms years after the initial onset of disease. Although these studies were conducted 15 years ago, when optimal antibiotic regimen guidelines were still evolving, the estimated cost of averting these often-disabling nonorgan-specific symptoms should also be taken into account in estimated sensitivity analyses of vaccine cost-effectiveness. The cost of treating sequelae is weighted heavily in the cost-effectiveness models presented by Meltzer and colleagues, which adds importance to considering post-Lyme syndrome. Nevertheless, we recognize the difficulty of this modeling, especially in the absence of validated cost-of-treatment data for these generalized symptoms.

A point of correction is that Meltzer et al. erroneously cite one of these studies (7) to infer that the long-term clinical sequelae of Lyme disease lasted a mean of 6.2 years from the onset of disease. In this retrospective study, Shadick et al. evaluated 38 persons with a clinical history of Lyme disease a mean of 6.2 years from the onset of disease regardless of the presence of persisting symptoms; 25 of these patients had no residual symptoms at follow-up. To accurately estimate the duration of clinical sequelae, longitudinal evaluations of representative populations of Lyme disease patients will be required because late manifestations have been demonstrated months to years after diagnosis (9,10).

Dimitri Prybylski
Author affiliation: University of Maryland School of Medicine, Baltimore, Maryland, USA

References

  1. Meltzer MI, Dennis DT, Orloski KA. The cost-effectiveness of vaccinating against Lyme disease. Emerg Infect Dis. 1999;5:3218. DOIPubMed
  2. Ellenbogen C. Lyme disease. Shift in the paradigm? Arch Fam Med. 1997;6:1915. DOIPubMed
  3. Liegner KB. Lyme disease: the sensible pursuit of answers. J Clin Microbiol. 1993;31:19613.PubMed
  4. Sigal LH. Persisting symptoms of Lyme diseasepossible explanations and implications for treatment [editorial]. J Rheumatol. 1994;21:5935.PubMed
  5. National Institute of Allergy and Infectious Diseases. Research on chronic Lyme disease. National Institutes of Health Office of Communications Fact Sheet; May 1997.
  6. National Institute of Allergy and Infectious Diseases. Emerging infectious diseasesNIAID research. National Institutes of Health Fact Sheet; Mar 1998.
  7. Shadick NA, Phillips CB, Logigian EL, Steere AC, Kaplan RF, Berardi VP, The long-term clinical outcomes of the disease. A population-based retrospective cohort study. Ann Intern Med. 1994;121:5607.PubMed
  8. Asch ES, Bujak DI, Weiss M, Peterson MG, Weinstein A. Lyme disease: an infectious and post-infectious syndrome. J Rheumatol. 1994;21:45461.PubMed
  9. Logigian EL, Kaplan RF, Steere AC. Chronic neurologic manifestations of Lyme disease. N Engl J Med. 1990;323:143844.PubMed
  10. Szer IS, Taylor E, Steere AC. The long-term course of Lyme arthritis in children. N Engl J Med. 1991;325:15963.PubMed

Suggested citation; Prybylski D. The Cost-Effectiveness of Vaccinating against Lyme Disease [letter]. Emerg Infect Dis [serial on the Internet]. 1999, Oct [date cited]. Available from http://wwwnc.cdc.gov/eid/article/5/5/99-0521.htm

DOI: 10.3201/eid0505.990521

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