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Beriberi
Classification and external resources
A sufferer – turn of the 20th century in southeast Asia
ICD-10	E51.1
ICD-9	265.0
DiseasesDB	14107
eMedicine	ped/229 med/221
MeSH	D001602

Beriberi (pronounced /bɛriˈbɛri/) is a nervous system ailment caused by a deficiency of thiamin (vitamin B1) in the diet. Thiamin is involved in the breakdown of energy molecules such as glucose and is also found on the membranes of neurons. Symptoms of beriberi include severe lethargy and fatigue, together with complications affecting the cardiovascular, nervous, muscular, and gastrointestinal systems.

[edit] Etymology

The origin of the word is from a Sinhalese phrase meaning "I cannot, I cannot", the word being doubled for emphasis.^[1]

[edit] Causes

Beriberi is caused by a lack of thiamine (vitamin B₁). Thiamin occurs naturally in unrefined cereals and fresh foods, particularly whole grain bread, fresh meat, legumes, green vegetables, fruit, and milk. Beriberi is therefore common in people whose diet excludes these particular types of nutrition e.g. as a result of famine.

Beriberi may be found in people whose diet consists mainly of polished white rice, which is very low in thiamin because the thiamin-bearing husk has been removed. It can also be seen in chronic alcoholics with an inadequate diet (Wernicke-Korsakoff syndrome), as well as being a rare side effect of gastric bypass surgery. If a baby is mainly fed on the milk of a mother who suffers from thiamin deficiency, then that child may develop beriberi as well.

The disease was often found in Asian countries (especially in the 19th century and before), due to those countries' reliance on white rice as a staple food.

[edit] Symptoms and effects

Its symptoms include weight loss, emotional disturbances, impaired sensory perception (Wernicke's encephalopathy), weakness and pain in the limbs, and periods of irregular heart rate. Edema (swelling of bodily tissues) is common. It may increase the amount of lactic acid and pyruvic acid within the blood. In advanced cases, the disease may cause heart failure and death.

• Wet beriberi affects the heart; it is sometimes fatal, as it causes a combination of heart failure and weakening of the capillary walls, which causes the peripheral tissues to become edematous.

• Dry beriberi causes wasting and partial paralysis resulting from damaged peripheral nerves. It is also referred to as endemic neuritis.

[edit] Treatment

Treatment for beriberi is with thiamin hydrochloride, either in tablet form or injection. A rapid and dramatic recovery within hours can be made when this is administered to patients, and their health can be improved within an hour of starting treatment. In emergency situations where concentrated thiamin supplements are unavailable, feeding the patient with a thiamin-rich diet (e.g. whole grain brown bread) will lead to recovery, though at a much slower rate.

[edit] History

In Asia, where polished white rice was the common staple food of the middle class, beriberi resulting from lack of vitamin B was endemic. In 1884, Takaki Kanehiro, a British-trained Japanese medical doctor of the Japanese Navy, observed that beriberi was endemic among low-ranking crew who often ate nothing but rice, but not among crews of Western navies and officers who consumed a Western-style diet. Kanehiro initially believed that lack of protein was the chief cause of beriberi. With the support of the Japanese Navy, he experimented using crews of two battleships; one crew was fed only white rice, while the other was fed a diet of meat, fish, barley, rice, and beans. The group that ate only white rice documented 161 crew with beriberi and 25 deaths, while the latter group had only 14 cases of beriberi and no deaths. This convinced Kanehiro and the Japanese Navy that diet was the cause of beriberi. This was confirmed in 1897, when Christiaan Eijkman discovered that feeding unpolished rice instead of the polished variety to chickens helped to prevent beriberi in the chickens. The following year, Sir Frederick Hopkins postulated that some foods contained "accessory factors"—in addition to proteins, carbohydrates, fats, et cetera—that were necessary for the functions of the human body.^[2]

In 1901, Gerrit Grijns (May 28, 1865 – November 11, 1944), Dutch physician and assistant to Christiaan Eijkman in Netherlands Indies, correctly interpreted the disease as a deficiency syndrome.^[3] Indeed, it was later shown that beriberi results from the deficiency of thiamin (vitamin B1).

Dr Edward Bright Vedder established (1910–13) an extract of rice bran as a treatment for beriberi.

Eijkman, a Dutch physician and pathologist, demonstrated that beriberi is caused by poor diet. His work led to the discovery of vitamins. Eijkman and Hopkins were awarded the 1929 Nobel Prize for Physiology or Medicine for the discovery.

[edit] See also

• Edward Bright Vedder
• Korsakoff's syndrome – also caused by thiamin deficiency

[edit] References

[edit] Footnotes

[edit] General references

• Angstadt JD, Bodziner RA (2005). "Peripheral polyneuropathy from thiamin deficiency following laparoscopic Roux-en-Y gastric bypass". Obes Surg 15 (6): 890–2. doi:10.1381/0960892054222759. PMID 15978166. 
• Hawk A (2006). "The great disease enemy, Kak'ke (beriberi) and the Imperial Japanese Army". Mil Med 171 (4): 333–9. PMID 16673750. http://findarticles.com/p/articles/mi_qa3912/is_200604/ai_n16350305. 
• Diagnosing Beriberi in Emergency Situations, by Prof Mike Golden, Aberdeen University. (n.d.)
• McIntyre N, Stanley NN (1971). "Cardiac beriberi: two modes of presentation". Br Med J 3 (5774): 567–9. PMID 5571454. 
• Mouly S, Khuong MA, Cabie A, Saimot AG, Coulad JP (1996). "Beri-Beri and thiamin deficiency in HIV infection". AIDS 10 (8): 931–2. doi:10.1097/00002030-199607000-00024. PMID 8828758. 
• Shivalkar B, Engelmann I, Carp L, De Raedt H, Daelemans R (1998). "Shoshin syndrome: two case reports representing opposite ends of the same disease spectrum". Acta Cardiol 53 (4): 195–9. PMID 9842404. 
• Haiti: Mysterious Prison Ailment Traced to U.S. Rice – Jeb Sprague and Eunida Alexandra. Inter Press Service (IPS). 17 January 2007.
• Weise Prinzo Z, de Benoist B (2002). "Meeting the challenges of micronutrient deficiencies in emergency-affected populations". Proc Nutr Soc 61 (2): 251–7. doi:10.1079/PNS2002151. PMID 12133207. 

[edit] External links

• www.wrongdiagnosis.com : beriberi
• Medical Encyclopedia, Medline, National Institutes of Health.
• L Arturo Batres, MD. Beriberi.EMedicine.com