Abstract
Lyme borreliosis is uncommonly seen in Canada. Most cases have occurred in close proximity to small geographical areas where infected ticks have become established. Although few cases are seen, thousands of patients are tested yearly. Unless patients are carefully selected and an appropriately sensitive and specific testing algorithm is applied, large numbers of patients without Lyme borreliosis will be incorrectly diagnosed. The Canadian Public Health Laboratory Network has developed the present guidelines to assist physicians in assessing patients for Lyme borreliosis, and to help guide the choice and interpretation of laboratory testing.
Highlights
Lyme borreliosis is uncommonly seen in Canada
Lyme borreliosis (Lyme disease) is a tick-borne spirochetal infection caused by Borrelia burgdorferi
Lyme disease is most often recognized by the development of a characteristic skin rash called erythema migrans (EM) at the site of the tick bite [7,8]
Summary
The Canadian Public Health Laboratory Network has developed the present guidelines to assist physicians in assessing patients for Lyme borreliosis, and to help guide the choice and interpretation of laboratory testing. Le Réseau des laboratoires de santé publique du Canada a préparé les présentes directives pour aider les médecins à diagnostiquer la borréliose de Lyme chez leurs patients et pour orienter le choix et l’interprétation des analyses de laboratoire. Lyme disease is most often recognized by the development of a characteristic skin rash called erythema migrans (EM) at the site of the tick bite [7,8]. A small proportion of individuals may not develop EM, or may fail to recognize or report the skin rash In such patients, the disease may progress to its disseminated form. Objective evidence of arthritis occurs in 60% of patients in North America and within approximately six months after exposure
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