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Wednesday, November 5, 2014

Infective Bagpipes: The Hidden Peril.




Prompted by a case, I wrote a short essay as a contribution to my "Continuing Professional Development" (a professional scheme which may be thought of as serving much the same purpose as the whip when steeplechasing a horse).  I thought it might be worth sharing (what's not to like about a bagpipe story?) and so I threw in a few explanations of terms and present it thus:





Earlier today while working through the day’s respiratory specimens, I came across the clinical information supplied by the physician: “Chest infection, patient plays the bagpipes”. Not being an activity I had ever considered might lead to infection; I thought it was worth a quick search of the literature.

The results suggested a small but extant risk of contracting a fungal lung infection from a badly cleaned pipe bag. The scientific literature is sparse on the subject (there not being much research grant money flowing around the bagpipe scene) but the odd occurrence did seem to be newsworthy, prompting such as:

A Warning To Clean Bagpipes from the New York times 18 March 2013: An excellent article detailing the case of a 77 year old Glaswegian bagpipe player diagnosed with pneumonia. the cause of which was only identified after culturing Rhodoturula and Fusarium from the pipe bag. Until the question of bagpipes arose, medical staff would have had no reason to suspect a predisposition to fungal infection, only investigating further after the near fatal failure of antibacterial therapy. In our laboratory we would also not routinely culture for fungi unless requested or some predisposing factor is apparent such as immune deficiency or instrumentation.

A previous case from 1978 discussed in The Lancet  involved a 60 year old piper admitted to The Royal Prince Alfred Hospital with acute myeloblastic leukaemia. Following treatment, material from the lungs of the patient was found to be infected with Cryptococcus neoformans, an identical strain to which was again cultured from his pipe bag. There seems to have been a degree of controversy at the time over the question as to whether he contracted C.neoformans from the bagpipes, or whether he caught it elsewhere as a consequence of the leukaemia and transferred it subsequently to the instrument. My own conjecture is that when someone is looking for a comforting distraction in the event of contracting a fungal pneumonia on top of acute myeloblastic leukaemia, I can’t see them reaching for the bagpipes. It seems akin to jogging for relief of a broken ankle. A possibility might be that the player did indeed transfer C.neoformans to the matrix of his pipe bag after a short, transient period of carriage. The yeast thrived therein, only by chance being able to infect the player opportunistically when his immune system was damaged by the leukaemia.

The construction and care of bagpipes has changed over the years. The traditional cow/sheepskin bag required more regular maintenance than their more modern synthetic relatives. Synthetic bags tend to be made from a fabric such as gortex which is breathable to allow moisture from saliva to evaporate, but which may provide a matrix in which fungi could thrive. The extra maintenance of the older type bag is thought by pipers to have made these sorts of infections less likely, due to the antimicrobial properties of the honey and herbs used to cure the material. Personally, I would have thought this unlikely. The main antimicrobial property of honey, when used historically in the dressing of infected wounds, comes from its sugar concentration reducing water activity. In the small amounts used in curing material, in a moist environment the honey is more likely act as a source of food than an antimicrobial agent.

Added to this, the bagpipes are, it would seem a temperamental instrument, as a consequence of which their owners are reluctant to strip and clean them when they are working well, in case this disturbs their equilibrium.

This is a rare route of infection, however the message would appear to be to clean your bagpipes regularly because there is a chance they could do to your lungs what they do to my ears.

                                                                AA