Written answers

Tuesday, 23 May 2017

Department of Health

Disease Management

Photo of Peadar TóibínPeadar Tóibín (Meath West, Sinn Fein)
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481. To ask the Minister for Health his plans to produce a funded care path for persons who are suffering from Lyme disease (details supplied). [24310/17]

Photo of Simon HarrisSimon Harris (Wicklow, Fine Gael)
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Lyme disease (also known as Lyme borreliosis) is an infection caused by a spiral-shaped bacterium called Borrelia burgdorferi. It is transmitted to humans by bites from ticks infected with the bacteria. The Health Protection Surveillance Centre (HPSC) of the HSE has extensive information concerning Lyme disease on its website www.hpsc.ie/a-z/vectorborne/lymedisease/.

Lyme disease is diagnosed by medical history and physical examination. The infection is confirmed by blood tests which look for antibodies produced by an infected person's body in response to the infection. These normally take several weeks to develop and may not be present in the early stages of the disease. The standard approach to Lyme diagnostics is a two-stage approach and involves using a sensitive enzyme immunoassay (EIA) as an initial, screening step. Screening EIAs can be insufficiently specific, giving false-positive reactions in the presence of other similar bacteria, and certain other viral infections, including glandular fever. In addition, blood samples from patients with autoimmune disorders and other inflammatory conditions can also lead to false-positive results. Samples giving positive or equivocal results in screening tests are further investigated in a second-stage immunoblot (Western blot) tests. Use of immunoblot testing greatly increases specificity. Using this two stage approach will give a great degree of certainty around the diagnosis of Lyme.

All clinical (and other) laboratories in Ireland must undergo continuous quality assurance to ensure that the quality of the diagnostics they provide is maintained at the highest international level for human diagnostics. Some laboratories abroad do not use antibody tests like the EIA (screening ELISA test) and Western Blot and instead will use other types of tests, for example, testing for levels of a specific white blood cell (CD-57) or lymphocyte transformation tests (tests to measure how specific cells in a person's immune system respond when exposed to antigens against Borrelia burgdorferi - the bacterium responsible for Lyme disease). These types of tests are not currently recommended by international groups such as the CDC, Infectious Diseases Society of America (IDSA) or BIA for a number of reasons:

I. There is not enough scientific evidence that they are suitable tests to diagnose Lyme disease;

II. There is no standard method to perform and interpret these kind of tests; and

III. Positive results in these kinds of tests may be due to other illnesses or conditions and not just Borrelia infection.

Lyme disease can be very successfully treated using common antibiotics. These antibiotics are effective at clearing the rash and helping to prevent the development of complications. Antibiotics are generally given for up to three weeks. If complications develop, intravenous antibiotics may be considered.

In Ireland, treatment by most clinicians is based on that laid out in evidence-based guidelines for the management of patients with Lyme disease, human granulocytic anaplasmosis (formerly known as human granulocytic ehrlichiosis), and babesiosis published by the Infectious Diseases Society of America (IDSA) in 2006. This pharmacological regime can be summarised thus:

- Doxycycline, amoxicillin or cefuroxime for the treatment of adults with early localised or early disseminated Lyme disease associated with erythema migrans, in the absence of specific neurologic manifestations (ceftriaxone in early Lyme disease for adults with acute neurologic disease manifested by meningitis or radiculopathy);

- Doxycycline, amoxicillin, or cefuroxime for adults with Lyme arthritis but without clinical evidence of neurologic disease;

- For late neurological disease in adults - intravenous ceftriaxone, cefotaxime or Penicillin G.

There is significant support and information for health professionals on the HPSC website. These supports include a fact sheet on tick borne diseases, including Lyme Disease. This fact sheet gives information on clinical features, the disease, transmission routes, prevention measures, diagnosis, and management and treatment. There is also an erythema migrans (EM) diagnostic tool to aid health professionals in the diagnosis of EM, which is frequently the earliest clinical manifestation of Lyme borreliosis.

As testing and treatment for Lyme borreliosis is widely available in Ireland there is no requirement for people to travel to other EU Member States to access these services.

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