George Budd and His Contribution to the Early History of Amyloid Disease
2021; Lippincott Williams & Wilkins; Volume: 20; Issue: S1 Linguagem: Inglês
10.1002/cld.1187
ISSN2046-2484
Autores Tópico(s)Renal Diseases and Glomerulopathies
ResumoContent available: Audio Recording Edward Richard Howard Amyloidosis is a general term for the extracellular infiltration of insoluble fibrils1, 2 (Fig. 1) of a variety of proteins that are produced in the bone marrow and found in the circulation as constituents of plasma. The wide spectrum of clinical phenotypes that result from this infiltration depends on the location and extent of the accumulation of the amyloid material.4, 6, 7 As with a majority of diseases, the etiology of amyloidosis remained something of a mystery in the 18th and 19th centuries. Early investigations were focused on patients who presented with gross hepatomegaly. The post-mortem macroscopic appearances of the enlarged livers were variously described as pituitous (mucoid), waxy, lardaceous (i.e., greasy, oily, bacony, or bacon-like) or scrofulous.8, 9 Srofulous amyloid was associated with chronic tuberculous infection of the cervical lymph glands, otherwise known as Scrofula. This term, which was familiar to the Hippocratic school, was subsequently encountered in 16th century medical literature from Salerno, Italy, as the diminutive of scrofa, which is Latin for a breeding sow. Apparently, the propensity to lymphadenopathy among scrofae was recorded by Aristotle10 some 23 centuries before the German Nobel Laureate, Heinrich Hermann Robert Koch (Fig. 2A), discovered his eponymous tubercle bacillus,11 which he demonstrated in scrofulous lymph nodes. Pre-Koch, however, scrofula simply denoted " … an inflammatory tumor…", commonly in the neck,12 of unknown transmissibility and an uncertain connection with tuberculosis in other parts of the body.13 The more colorful historic name for tuberculous lymphadenopathy of the neck, "The King's Evil," began in the reigns of Clovis of France (481-511) and Edward the Confessor in England (1042-1066) and derived from the belief that that these Royal Houses had a supernatural gift to cure scrofula by touching the sufferers. The formal practice in which the monarch touched the diseased subject. – as vividly described by Shakespeare in Macbeth (Act IV Scene 3), which included awarding the medallion touch-piece as a talisman for the supplicant – began with Louis IX of France (1226-1270) and Edward III in England (1327-1377).14 There was a prolonged debate in earlier times as to whether the extracellular deposition of material responsible for the hepatomegaly was a carbohydrate or a protein derivative. Although initial reports were mostly concerned with its hepatic infiltration, renal involvement was eventually documented, and was then followed by descriptions in other organs by Sir Samuel Wilks Bt** Baronet. (Fig. 2B),15 collaborator and biographer of his "Three Great" contemporaries at Guy's Hospital, Thomas Addison, Richard Bright and Thomas Hodgkin. Arguably, one of the most eminent physicians of the Victorian era, Wilks (1824-1911) – whom The Times once called ''the most philosophical of English physicians…', and "who thought that the most wonderful thing in the world is a woman's nervous system."16 – was a Fellow of the Royal Society, onetime President of the Pathological Society, President of the Neurological Society, Member of the Senate of the University of London and of the General Medicine Council, President of the Royal College of Physicians (1896-1899) and Physician Extraordinary to Queen Victoria. The term amyloid was suggested, nay decreed, in 1854 by the great German pathologist and outspoken reform-minded political activist, Rudolph Ludwig Karl Virchow (Fig. 2C, 1821-1902), whose alleged choice of weapons in response to Prussian Chancellor Otto Eduard Leopold von Bismark's challenge to a duel, was a Trichinella-infected pork sausage for one and a non-tainted sausage for the other, masked and randomly assigned. Virchow's proposal was declined by his would-be combatant, and a duel did not materialize. (This is the stuff that myths are made of, and here the colorful legend is almost certainly apocryphal). Virchow was a champion of the Theodor Schwann's and Matthias Schleiden's Cell Theory – omnis cellula e cellula ("all cells come from cells") – and his eponyms include cells in the bone and the cornea, a law about the origin of cells, a metastatic cancerous supraclavicular node, and the triad of factors that predispose to vascular thrombosis. Yet he rejected the Germ Theory of Disease and Darwin's Theory of Evolution. It is generally considered that Virchow believed that the color change of macroscopic human tissue from brown to violaceous blue-black after the application of iodine and sulphuric acid indicated either cellulose or starch.17 Thus, when he observed that small round deposits in the nervous system reacted to the sequential application of iodine and sulphuric acid with this color change, he named the deposits "corpora amylacea", derived from the Latin word amylum–amylon, , in Greek. – meaning starch or fine meal. But, nowadays, it is almost impossible to know now exactly whether Virchow thought that the material in question that stained blue-black in the human brain, was cellulose-like or starch-like because nomenclature and chemical connotations have changed since Schleiden's and Virchow's time, and a precise literal translation into English of passages in German are impossible.18 The word amyloid was originally used by the botanist Matthias Schleiden in 1838 to describe the amylaceous, or starch-like, constituent of plants19 that turned out to be cellulose. Johann Heinrich Meckel von Hemsbach (Fig. 2D), the last scientist in the renowned Meckel dynasty (Fig. 3),20 and Virchow's successor as Prosector at Charité Hospital in Berlin and predecessor as Chair of Pathological Anatomy at the University of Berlin, preferred the designation cholesterin. Von Hemsbach's terminology only adds to the confusion that results from the proliferation of amyloid aliases in the literature, which we have already briefly noted (and will expound further), that comprise lardaceous, bacony, waxy, pituitous, starch, cellulose, and scrofulous. The current essay will commence with a brief review of selected publications from the 18th and 19th centuries in which were reported clinical cases of hepatomegaly secondary to an infiltration, and the attempts to define the nature of the infiltrating material. These early reports will be followed by a description of the work of George Budd (Fig. 4), who gave perhaps the clearest descriptions and analysis of the condition in the first half of the 19th century, in successive editions21-23 of his comprehensive textbook of liver disease (Fig. 5). Section III, that dealt with "Scrofulous enlargement of the liver, and other kindred states," increased from 10 pages in the 1845 1st edition,21 to 25 pages by 1857 when the 3rd edition23 was published. Summaries of the clinical histories and presentations of Budd's cases are included below with references to his accurate analyses of the proteinaceous and not fatty nature of the infiltration, in which assays he was assisted by a certain Mr. Beale. George Budd's older brother William – the esteemed pioneer epidemiologist who had discovered the water-borne transmission of typhoid fever that he also distinguished from typhus – and a nephew, the notoriously sociopathic George Turnavine Budd, nemesis of Arthur Conan Doyle, creator of Sherlock Holmes – were also involved in the amyloid story. Jeremiah Wainewright (1673-?1722), a physician and Member of the College of Physicians in London gave perhaps the first detailed description of amyloid infiltration of the liver in his 1722 treatise on the liver24 (Fig. 6). He wrote: "The liver as it is a glandulous body, is a proper seat for schirrous tumours, which here, as in other parts of the body, are hard tumours, resisting any impression made upon them; and when exquisite, are without pain, tho'at their beginning, before they are confirmed, they will have pain. These tumours frequently arise from the matter of them, being insensibly, and in process of time, accumulated in the liver; tho' they are likewise the consequences of inflammations, where the thinner parts of the circulating humours being evaporated, the remaining thicker matter became the original cause of a scirrhous tumour; and this, it may be, in the very glands of the Liver." Wainewright went on to describe a case reported by Francis Glisson (Fig. 7), a physician and Professor of Physics at Cambridge University (1597-1677). The patient died after suffering with strumous (scrofulous or tuberculous), cervical glands for several years and post-mortem examination revealed a liver enlarged by "swellings of a clay-coloured pituitous (mucoid) substance." To the renowned anatomist, physician and historian of French Medicine, Baron Antoine Portal (1742-1832) Knight of the Empire and post-revolutionary physician of kings†† Resulting from his close relationship with Emperor Louis XVIII, not only was Portal named le premier médecin du roi but additionally l'Académie Nationale de Médecine was created, of which he was the lifelong president.25 (Fig. 8), the substance was reminiscent of bacon and therefore became designated lardaceous. It is believed, however, that Wainewright's account may be the first clear report of a case of amyloid liver associated with long standing cervical tuberculosis. Although Wainewright undoubtedly deserves his due for having been the first to describe amyloid liver, it seems likely that in 1639 Nicolaus Fontanus (Nicolaes Fonteyn, Nicolao Fontano), a Dutch physician and poet living in Amsterdam, was the first to describe systemic amyloidosis in the autopsy of a young man (with ascites, jaundice, epistaxis and a liver abscess), epitomized by amyloid spleen,26 known then as white stone-containing or Sago spleen (sagomilz), because the white nodules in the spleen were reminiscent of sago seeds or pearls, the starchy food that is extracted from the spongy pith of various tropical palms, especially those of Metroxylon sagu, and is a staple foodstuff in New Guinea and the Moluccas. Thomas Bartholin, discoverer of the lymphatic system, likened the sound of incising a wood hard amyloid spleen like cutting through spongy timbers.27 Abercrombie (Fig. 2e), an Edinburgh physician (1780-1844), was "First Physician to his Majesty in Scotland (William 1V)" and a close friend and medical advisor to Sir Walter Scott. He described the case of a boy aged 11 years who presented with severe tuberculous enlargement of cervical nodes and who died 1 year later with a severe chest infection. Post-mortem examination confirmed tuberculous infection of the lungs and enlarged lymph nodes in the chest and abdomen. The liver was pale and severely enlarged to fill the whole of the upper half of the abdomen. Abercrombie wrote – "I think this is most frequently observed in young persons of a scrofulous habit, but is occasionally met with at a more advanced age." He also referred to cases of "pale degeneration of the liver" with a uniform dull yellow colour "closely resembling the colour of impure bees' wax….., they are chiefly observed when the patient has died of some other affection."28 While Abercrombie in Edinburgh was musing on the nature of pale bulky livers, Robert Carswell, Professor of Pathological Anatomy in University College in London, was wrestling with the nature of the pallid hepatomegaly that he observed chiefly in women who had died of the progressive wasting disease that was pulmonary tuberculosis.29 The prevailing prejudice among pathologists to explain lardaceous disease, was that there was superadded fatty material rather than fatty transformation of the involved organs. But, somehow, the consistency of the affected organ to the probing finger seemed unlike fat.29 Baron Karl Freiherr von Rokitansky (1804-1878), pathologist and philosopher (Fig. 2F), was the Professor of Pathological Anatomy in Vienna. In agreement with his French near-contemporary Antoine Portal,30 the renowned Bohemian Viennese pathologist referred to amyloid of the liver as a lardaceous (like bacon‡‡ In characteristic outspoken fashion, Virchow rejected the term "lardaceous," on gastronomic grounds, because he felt that those who favored it could not be true epicures of good bacon.31 ) infiltration and confirmed its relationship with tuberculosis (scrofula), rickets, syphilis, and medication with mercury.32, 33 He described an affected liver, Die speckige leber, as being considerably enlarged, of a doughy consistency – that Carswell had remarked upon29 – and colored a grayish-white or greyish red. He noted that the spleen is commonly affected and described concomitant renal disease as Bright's disease (acute or chronic nephritis). In his highly regarded book, On Diseases of the Liver,21-23 George Budd (1808-1882) began his section on Scrofulous enlargement of the liver, and other kindred states, with the two earlier reports by Abercrombie28 and Portal,30 respectively, of children who had died with extensive tuberculosis and severe hepatomegaly Accordingly, this section of Budd's books commences with a statement that enlargement of the liver may occur in association with scrofulous disease of the glands or of the bones, i.e., chronic tuberculous infection, and that the enlargement resembles fatty infiltration in many respects but differs from it in the character of the matter deposited. Budd notes that Portal gave a detailed description of a post-mortem of an 8-year old boy who had died of chronic tuberculous disease with a "liver of prodigious size," which had a whitish appearance. Sections of the liver exposed to heat, boiling water, or alcohol were "hardened like albumen."30 A third, personal case, a child referred by George Budd's younger brother William, had suffered for several years with tuberculosis of the hip and an "immensely enlarged liver." Post-mortem examination showed a pale red colour "mottled by white lines and spots having much the look of bacon rind." Budd commented that the patient had no fever and no jaundice. A fourth case, also referred by William Budd, was a woman aged thirty who had a long history of tuberculous disease of the metatarsals of both feet and one ankle joint, and who died from the mechanical effects of massive enlargement of the liver that filled the abdomen and part of the chest and was described at post-mortem as having the appearance of yellow wax. Chemical analysis of the liver confirmed that the liver was infiltrated with an albuminous material. Three further cases can be summarised as follows:- Case 5 – A male 21 years of age died after a long history of tuberculous bone infection of the left arm, the great toe, the 7th rib, and left lung. His liver was "enormously enlarged" and showed a "waxy appearance" at post-mortem examination caused by the deposit of a large amount of whitish material shown on analysis to be albuminous. A similar substance was observed in the kidneys. Case 6 – A male 15 years of age died after a 4-year history of tuberculous infection of the right hip, "enormous enlargement of the liver and spleen," and renal failure. At post-mortem the liver was infiltrated with a greyish material which was albuminous on analysis. Similar material was present in the kidneys. Budd summarised the hepatic features of the last four personal cases in a very clear manner. All were associated with tuberculosis. The infiltration of the liver by an albuminous substance was whitish and although tough it was not hard, and the cut surface had the appearance of "compact bacon." Microscopically the foreign material was between and not within the liver cells which continued to function and jaundice‖‖ Which Budd encountered on occasion, and it had been observed by others. was not a feature of the disease. Case 7 – A male 40 years of age died after a 4-year history of severe infection of the left kidney and a perinephric abscess. His liver was "enormously enlarged" and post-mortem examination revealed changes of "precisely the same kind as in the preceding cases." There was no evidence of tuberculous infection in this case, only chronic infection in the left kidney. Budd concludes this section of his book with a review of other possible causes of severe hepatic enlargement. He highlights the similarity of the features of scrofulous enlargement with those found in enlarged livers of patients with syphilitic bone disease, particularly those who had been treated with mercury. In summary, Budd described very clearly the progressive enlargement of the liver associated with chronic infection with tuberculosis, syphilis, or renal infection. He attributed the absence of liver tenderness and pain to the slow pace of hepatic enlargement; he also noted the infrequency of fever and the variable presentation with jaundice and ascites. Budd described the gross and microscopic features of the hepatic infiltration with an albuminous substance now known as amyloid, and he stated that the patients died from a similar infiltration of the kidneys. In 1861, Frerichs (1819-1885), Director and Professor of Medicine (Fig. 9) at the Charité Hospital in Berlin, who gave the first description of familial hepatolenticular degeneration (now known as Wilson disease), summarized the early knowledge and understanding of amyloidosis in a comprehensive chapter headed Waxy, Lardaceous or Amyloid Degeneration of the Liver in the second volume of his book A Clinical Treatise on Diseases of the Liver34 (Fig. 9), in the frontispiece of which were line drawings of hepatocytes in various stages of waxy or amyloid degeneration (Fig. 10). In the preface, Frerichs apologizes that the second volume of this treatise on liver diseases appeared later than intended, which he attributed to his move from Breslau to Berlin. Furthermore, he expresses the hope that when he has more leisure than his new position in Berlin affords, he will furnish remarks on the general pathology and treatment of the liver. In the chapter on amyloid of the liver, Frerichs credited Georg Ernst Stahl (1659-1734), the scientifically controversial and antagonistic German chemist and physician, and Herman Boerhaave (1668-1738), a Dutch botanist, chemist, Christian humanist and physician – best remembered for his eponymous description of rupture of the esophagus caused by violent vomiting – with early descriptions of hepatic amyloid and suggestions that the cause of the condition was thickened blood leading to infarction and engorgement of the liver. Like Budd, he also credited Antoine Portal, with an early case report, and with the classification of amyloid into "albuminous, gelatinous and mucus varieties." Frerichs stated that Rokitansky gave "the first clear account of the essential features of lardaceous degeneration32, 33 that Budd22 had described as "Scrofulous Enlargement of the Liver," and that Friedreich and Kekulé had reported in 185935 that amyloid consisted of deposits of albuminoid proteinaceous material and neither fat nor carbohydrate nor cellulose, as had been previously suggested. Budd, however, had already arrived at the same conclusion in 185222 when he deduced after chemical analyses in three cases that "The foreign matter, to which the liver owes its large size is albuminous, and, when not stained by bile is whitish and somewhat glistening." Moreover, Budd noted that "The matter infiltrating the liver when treated with a solution of iodine, it acquires, like starch, an intense reddish-yellow color, turning on the addition of sulphuric acid, to a beautiful violet and blue," and he endorsed Virchow's point of view concerning nomenclature, namely that the so-called lardaceous or waxy condition of the liver be recognized as "amyloid degeneration." However, neither the amyloid appellation nor the interpretation of the violet/blue reaction with iodine and sulphuric acid nor the demise of the term lardaceous, were universally accepted lightly, and especially not by Samuel Wilks Bt (Fig. 2B), who led a rear-guard lardaceous or bacony counterattack. William Howship Dickinson (Fig. 11) (1832-1913), physician at St. George's Hospital and the Hospital for Sick Children at Great Ormond Street, London, focused his attention on what he alluded to as Waxy, Amyloid or Depurative, i.e., connected with suppuration, Disease affecting the kidneys,34, 37 which he described with great clarity in print, and in person at a meeting of The Pathological Society of London in 1869 when he appealed for the creation of a committee of pathologists to decide upon the most suitable name for the condition and to recognize that the substance deposited in organs was proteinaceous material derived from the blood.38 The Committee on Lardaceous Disease duly met, debated, reported and upheld the term Lardaceous,39 against which decision Dickinson subsequently railed,40 and despite the finding that "the waxy liver is unusually poor in oil."41 Virchow's label17, 42 eventually prevailed, such was his standing among pathologists. The violet blue-black staining reaction of starch with iodine and sulphuric acid that was discovered by Jean Jaques Colin and Henri-François Gaultier de Claubry in Gay-Lussac's laboratory in Paris,43 used by Schleiden to detect starches in plants18 and interpreted by Virchow as detecting a starch-like (or was it cellulose-like?) substance, i.e., amyloid, initially in the human brain17 and later in the liver and other organs afflicted with scrofulous enlargement, turned out to be highly complex and exquisitely dependent on experimental conditions, such as the concentration of the sulphuric acid. Anyway, interpretation of the results with respect to the composition and nature of the target tissues was far from unequivocal.'44 The introduction of the metachromatic aniline dyes with their tantalizing property of metachromasia, turned out to be a boon to the discipline of histopathology and to the field of amyloid studies, and for the textile and fashion enterprises. Metachromasia, refers to the phenomenon in which certain tissue constituents reacting with a single dye show different colors from that of the dye solution; apparently, the binding of dye molecules by certain substances in the tissues, so-called chromotropes, brings dye molecules close enough together to form dimeric and polymeric aggregates that have different light absorption spectra from the parent monomeric dye molecules.45 In 1856, in a failed attempt to synthesize quinine for the treatment of malaria, 18-year-old William Henry Perkin, in an apartment of his London East End home,46 serendipitously synthesized the world's first aniline dye that he called aniline purple (on account of its intense purple color), which was later changed to mauve (Mauvine) after the name of French flower, Following the runaway commercial success of Mauveine, a veritable rainbow of aniline dyes followed produced from cheap synthetic aniline by the emerging massive German dye industry, which the Allies broke down after the Second World War because of the use of slave labor in Auschwitz and other Nazi concentration camps. Meanwhile, in 1875, three eminent European pathologists, André-Victor Cornil in Paris, Richard Heschl in Vienna, and Rudolf Jürgens in Berlin, almost simultaneously published novel staining methods for amyloid, using the new aniline dyes: methyl violet, violet ink (aniline violet), and iodine violet (a compound of methyl iodine and aniline, known as dahlia), respectively.45 The publication in 1874 by J. André, of the use of aniline red and aniline blue to stain the outer segments of retinal rods yellow or green, respectively47 that predicted the breakthrough revolutionary durable and non-destructive amyloid staining, was seemingly overlooked. Notwithstanding. the stunning success of the new staining methods for amyloid sounded the death knell for the time-honored iodine-sulphuric acid technique. However, before the advent of structural techniques (illustrated in Fig. 1A and C) to identify and characterize amyloid, one last, even more colorful development occurred in the amyloid story that endures to this day, namely Congo Red staining.48 In 1883, an obscure young chemist working in the dyestuff chemical laboratory of Friedrich Bayer in Elberfeld, Germany, Paul Böttiger, discovered a brilliant red dye that could stain textiles directly without the usual need for a separate permanent fixative to the fabric. Yet Bayer was disinterested; so Böttiger eventually sold his patent elsewhere. The Berlin manufacturer, Actiengesellschaft für Anilinfarbenfabrikation (AGFA), began selling the dye in 1885. Their exotic tradermark, Congo red was seemingly inspired by a newsworthy current geopolitical diplomatic trade conference in Berlin concerning the Congo River basin. The term "Congo" in the trademark was solely a marketing ploy, there being no Central African connection. As with the myriad aniline dyes, Congo red was used as soon as 1886 to stain tissue,48 but it was only in 1922 that the avidity for amyloid fibrils was appreciated (Fig. 1B, above right), and especially the characteristic apple-green birefringence under polarized light (Fig. 1B, below right). Congo red remains the dye of choice for amyloid diagnosis. Cook and others have published detailed histories of George Budd's remarkable family (Fig. 12) and its academic achievements.49-53 Budd was born in England in 1808, in the southwest County of Devon, in North Tawton, a town that dates from Roman times, at or near the site of an ancient Celtic Druidic sanctuary. George's father, Samuel (1772-1841), was a local surgeon and general practitioner, whose family of 9 sons and one daughter were all home-schooled. George and four of his brothers studied at Cambridge University, where all were Wranglers, an arcane term that indicates having obtained first-class honors in the Mathematics Tripos bachelor examination. In addition, six of George's siblings also became physicians. George was a remarkably gifted mathematician and achieved "Third Wrangler" status (third position) in the Cambridge mathematical tripos examination in 1831. This achievement can be measured against the attainments of people like William Bragg (3rd), Bertrand Russell (7th), and John Maynard Keynes (12th). Bachelor examinations at Cambridge University took the name Tripos, allegedly from the three-legged stool on which a candidate sat for cross-examination and to deliver a satirical speech at the degree ceremony. George's younger brother William, who was born in 1811, and who studied in Paris, London, and Edinburgh, is perhaps the most widely recognized member of the family for his outstanding work on typhoid fever and cholera and for his fundamental work in improving sewers and water supplies. Many people have recognized him as the founder of public health and preventive medicine. George Budd is now recognized as perhaps the leading hepatologist of the 19th century, and he is chiefly remembered for the first description of what he described as an "extremely rare" adhesive inflammation and obstruction of the hepatic veins in a man of 52 years of age, which he attributed to the drinking of large quantities of gin.22 In 1898, Hans Chiari (1851-1916), an Austrian pathologist and colleague of Rokitansky in Vienna, published the first comprehensive patient series of the condition,54 which later became known by the eponym Budd-Chiari syndrome. Notably both George, who studied in Paris and at the Middlesex Hospital, London, and William, were elected as Fellows of the Royal Society in 1836 and 1871, respectively. Both were appointed as visiting physicians to the floating Dreadnought Seaman's Hospital (Fig. 13), at Greenwich on the River Thames, between 1837 and 1840. George resigned after his appointment as Professor of Medicine at the recently opened King's College Hospital in Portugal Street,¶¶ Where the London School of Economics (LSE) was subsequently located. Holborn, and William also resigned after a severe illness with the Rickettsial infection typhus. He transferred to the Bristol Royal Infirmary. The two brothers continued to correspond on clinical matters, and William would send complex patients to George for diagnosis and treatment. George Budd's work in Greenwich included a detailed study of cholera in collaboration with the polymath, Mr. George Busk,§§ In Great Britain, surgeons are traditionally known by the title "Mister" and not "Doctor", even though they are medically qualified practitioners. – surgeon, parasitologist, zoologist, and paleontologist.55 Most important, Budd explored the reasons for a rise in the incidence of scurvy during the 19th century, almost a 100 years after results of James Lind's conclusive prospective randomized trial on HMS Salisbury showed the anti-scorbutic benefits of fresh citrus fruit. Budd's study resulted in clear rules for the prevention of the disease, resulting in a document (Fig. 14) that was circulated to all ship owners and captains of merchant ships. His interests were very wide ranging. Not only did he publish his clinical experience in two major books – On diseases of the liver21-23 and On the organic diseases and functional disorders of the stomach56 but also a series of remarkable papers in the London Medical Gazette, which gave much evidence for the presence of "obligatory" micronutrient substances in normal diet the absence of which would lead to well defined deficiency diseases.57, 58 These papers were published at a time when studies of the physiology of nutrition were mostly concerned with detailed nutritional aspects of proteins, carbohydrates and fats and Budd's revolutionary observations on other possible important substances in normal diets were virtually ignored. More than 50 years before their recognition as vitamins A, C, and D, Budd concluded from his studies on patients with corneal ulceration, scurvy, and rickets that their etiology might be related to the dietary deficie
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