Environmental Medicine in Clinical Practice [Paperback]

In the blue corner, representing the "blimps", and supported by a veritable bombast of professors and Royal Colleges, we find the British Society for Allergy and Clinical Immunology (BSACI). In the pink corner, appearing for the "nuts", with fewer professors but fairly pawing the ground in eagerness, appears the British Society for Allergy, Environmental and Nutritional Medicine (BSAENM). The second group used to describe themselves as "clinical ecologists", which I think was a better description since it clarified their brief; they are as much concerned with toxicity as with immunology. Environmental Medicine in Clinical Practice is the acceptable face of clinical ecology, and contains a lot more hard science than you might expect.

As a career immunologist/allergist, I had watched bemused as the first clinical ecologists, led in the UK by Richard Mackarness, started to catch the media limelight with their tales of miracle cures in migraine and depression after simple dietary eliminations. Food intolerance is nothing new, and apart from the range o f conditions being treated, I wondered what was so newsworthy and why these upstarts were stealing our thunder. Clinical ecologists, as far as I could see, knew nothing about immunology, had never heard of us, and seemed to think that they had discovered allergy for themselves. And what about desensitisation?

We knew about injection therapy for pollen allergy, and we knew that skin-testing with protein allergens can sometimes provoke systemic symptoms. But the clinical ecologists were trying to tell us that if you injected exactly the right dose of allergen, you could also switch symptoms off! Sometimes within minutes! They called it "neutralisation". Obvious poppycock; these people were clearly mad.

I had to start changing my tune when in 1978 The Lancet published the first report, by Finn and Cohen, of double-blind food-challenge studies. These and subsequent reports proved beyond doubt that specific food intolerance can indeed cause quite unexpected symptoms. But "neutralisation" was something else, and I remained an implacable sceptic until I read W J Rea's paper (Arch Otolaryngol 1984; 110: 248-52) reporting a double-blind trial of this treatment. I had met Rea and respected him, and the study he reported was watertight. This paper, I thought, could mean only two possible things. Either Rea is lying, or neutralisation works. Soon other double-blind trials were published and I started trying the new, incredible method. For diagnosing allergies it was pretty useless, but used as a treatment method it doubled my ability to change ill people into well people. But few others joined me in crossing the floor. Conventional allergists, by and large, drew up in battle formation to discredit us, and were joined by one or two psychiatrists.

Why psychiatrists? Because we clinical ecologists invade their territory. Not that we aspire to take over the major psychoses, but we do have observations about the many medically unexplained symptoms that tend to be labelled as somatisation or hypochondria. Environmental Medicine in Clinical Practice gives a list of symptoms and syndromes that have been reliably provoked by double-blind challenge with specific foods. It includes nausea, lethargy, irritability, headaches, enuresis, and numerous other "medically unexplained" conditions. Less compellingly, but still strikingly, chapter 16 lists symptoms that frequently resolve as soon as nutrition is optimised and intolerances and allergies controlled; it includes aggressive and unreasonable behaviours, bulimia, anorexia, irritability, and mood swings. I describe these as less compelling because the challenges reported were not double-blind, but the parents, teachers, and in some cases police officers involved in caring for these patients have no doubts.

What else do the two camps disagree about? Food addiction, gut dysbiosis (the "candida hypothesis"), novel methods of desensitisation, the dangers of ambient chemical pollutants and of pharmacotherapy, the importance of micronutrients, and the causes of hyperactivity. This book adduces evidence for all it's views, much of it unashamedly based on the oldest clinical science of all, watching patients. The balance of the book is uncontroversial; allergists of either denomination could have written the chapters on aeroallergens, mechanisms, pollution, and economic aspects, showing that despite the differences, there is also much agreement between the two camps.

Any niggles about the book? Well, I don't like the terms "masked allergy" and "Type B Allergy". The first is used to describe the addiction-like state in which the damaging substance makes the sufferer feel better for a while, and the second for intolerance states mediated by unknown pathways. Both conditions exist, often together, but these names generate more heat than light.

That said, the book is timely, well written, well argued, well referenced, attractive, and cheap. The official line put out by traditionalists that "there is no evidence" for clinical ecology will not do; there is evidence, and these authors have presented it.(Extracted from ,THE LANCET l Vol 351, January 17, 1998 - reprinted with permission)