Hand, foot and mouth disease
|Hand, foot and mouth disease|
|Classification and external resources|
Typical lesions around the mouth of an 11-month-old boy
Hand, foot and mouth disease (HFMD) is a human syndrome caused by intestinal viruses of the picornaviridae family. The most common strains causing HFMD are coxsackie A virus A16 and enterovirus 71 (EV-71), but may be caused by various strains of coxsackievirus or enterovirus.
HFMD is a common and highly contagious viral infection that typically causes a mild, self-limited febrile illness followed by a maculopapular rash that may involve the skin of the hands, feet, and oral cavity. HFMD is fairly common and typically affects infants and children, but may affect immunocompetent adults on occasion. The viruses that cause HFMD are spread through direct contact with the mucus, saliva, or feces of an infected person. HFMD typically occurs in small epidemics in nursery schools or kindergartens, usually during the summer and autumn months. The usual incubation period is 3–6 days.
HFMD should not be confused with foot-and-mouth disease (also known as hoof-and-mouth disease), a distinct viral disease known to affect sheep, cattle, and swine (both diseases are caused by members of the picornaviridae family) but is not transmitted between animals and humans.
Signs and symptoms
Early prodromal symptoms are likely to be fever often followed by a sore throat. Loss of appetite and general malaise may also occur. Between one and two days after the onset of fever, painful sores (lesions) may appear in the mouth, throat, or both. A rash (vesicle) may become evident on the hands, feet, mouth, tongue, inside of the cheeks, and occasionally the buttocks (but generally, the rash on the buttocks will be caused by the diarrhea). HFMD usually resolves on its own after 7-10 days.
- Sore throat
- Painful perioral, intraoral, nasal, or facial lesions, ulcers or blisters
- Maculopapular rash, followed by vesicular sores with blisters on palms of hand, soles of feet, buttocks, and sometimes on the lips. The rash is rarely itchy for children, but can be extremely itchy for adults
- Sores or blisters may be present on the buttocks of small children and infants
- Irritability in infants and toddlers
- Loss of appetite
The diagnosis of Hand, Foot and Mouth Disease can usually be made on clinical grounds by a physician. If the diagnosis is unclear, a throat swab or stool specimen may be taken to identify the virus by culture. The common incubation period (the time between infection and onset of symptoms) ranges from three to six days.
Many physicians do not prescribe medications for this illness since hand, foot and mouth disease is a self-limiting viral disease that must run its course. Currently, there is no specific curative treatment for hand, foot and mouth disease; disease management typically focuses on achieving symptomatic relief. Pain from the sores may be eased with the use of analgesic medications. Infection in older children, adolescents, and adults is typically mild and lasts approximately 1 week, but may occasionally run a longer course. Fever reducers and lukewarm baths can help decrease body temperature.
A minority of individuals with hand, foot and mouth disease may require hospital admission due to uncommon neurological complications such as (encephalitis, meningitis, or acute flaccid paralysis) or due to non-neurologic complications such as myocarditis, pulmonary edema, or pulmonary hemorrhage.
Complications from the viral infections that cause HFMD are uncommon, but require immediate medical treatment if present. HFMD infections caused by Enterovirus 71 tend to be more severe and are more likely to have neurologic or cardiac complications than infections caused by Coxsackievirus A16. Viral or aseptic meningitis can occur with HFMD in rare cases and is characterized by fever, headache, stiff neck, or back pain. The condition is usually mild and clears without treatment; however, hospitalization for a short time may be needed. Other serious complications of HFMD include encephalitis (swelling of the brain), or flaccid paralysis in rare circumstances.
Fingernail and toenail loss have been reported in children 4-8 weeks after having hand, foot, and mouth disease (HFMD). The relationship between HFMD and the reported nail loss is unclear and causality has not been established. Nail loss reported after HFMD was temporary and nail growth resumed without medical treatment.
No vaccine currently exists to protect individuals from infection by the viruses that cause HFMD, but such vaccines are being developed. HFMD is highly contagious and is transmitted by oropharyngeal secretions such as saliva or nasal mucus, by direct contact, or by fecal-oral transmission. Preventive measures include avoiding direct contact with infected individuals (including keeping infected children home from school), proper cleaning of shared utensils, disinfecting contaminated surfaces, and proper hand hygiene. These measures have been shown to be effective in decreasing the transmission of the viruses responsible for HFMD.
Hand, foot and mouth disease cases were first described in New Zealand in 1957.
- In 1997, 31 children died in an outbreak in the Malaysian state of Sarawak.
- In 1998, there was an outbreak in Taiwan, affecting mainly children. There were 405 severe complications, and 78 children died. The total number of cases in that epidemic is estimated to have been 1.5 million.
- In 2008 an outbreak in China, beginning in March in Fuyang, Anhui, led to 25,000 infections, and 42 deaths, by May 13. Similar outbreaks were reported in Singapore (more than 2,600 cases as of April 20, 2008), Vietnam (2,300 cases, 11 deaths), Mongolia (1,600 cases), and Brunei (1053 cases from June–August 2008)
- In 2009 17 children died in an outbreak during March and April 2009 in China's eastern Shandong Province, and 18 children died in the neighboring Henan Province. Out of 115,000 reported cases in China from January to April, 773 were severe and 50 were fatal.
- In 2010 in China, an outbreak occurred in southern China's Guangxi Autonomous Region as well as Guangdong, Henan, Hebei and Shandong provinces. Until March 70,756 children were infected and 40 died from the disease. By June, the peak season for the disease, 537 had died.
- In 2011 Vietnam, by 04.09 the disease was reported to have claimed 98 lives, 75% of whom were children under 3 years old. Although there was no official declaration of an outbreak, over 42,000 cases were reported. Over 10,000 new cases were recorded in the second half of August alone.
- The World Health Organization reporting between January to October 2011 (1,340,259) states the number of cases in China had dropped by approx 300,000 from 2010 (1,654,866) cases, with new cases peaking in June. There were 437 deaths, down from 2010 (537 deaths).
- In December 2011, the California Department of Public Health identified a strong form of the virus, coxsackievirus A6 (CVA6), where nail loss in children is common.
- In 2012 in Alabama, United States there was an outbreak of an unusual type of the disease. It occurred in a season when it is not usually seen and affected teenagers and older adults. There were some hospitalizations due to the disease but no reported deaths.
- In 2012 in Cambodia, 52 of 59 reviewed cases of children reportedly dead (as of July 9, 2012) due to a mysterious disease were diagnosed to be caused by a virulent form of HFMD. Although a significant degree of uncertainty exists with reference to the diagnosis, WHO report states, "Based on the latest laboratory results, a significant proportion of the samples tested positive for enterovirus 71 (EV-71), which causes hand foot and mouth disease (HFMD). The EV-71 virus has been known to generally cause severe complications amongst some patients."
- Hand, foot and mouth disease infected 1,520,274 people with 431 deaths reported up to end of July in 2012 in China.
- Shang, L; Xu, M; Yin, Z (February 2013). "Antiviral drug discovery for the treatment of enterovirus 71 infections". Antiviral Research 97 (2): 183–194. doi:10.1016/j.antiviral.2012.12.005. PMID 23261847.
- Suhaimi, Nur Dianah (April 20, 2008). "HFMD: 1,000 cases a week is unusual, says doc". Singapore: The Sunday Times (Straits Times). pp. 1–2.
- Li, Y; Zhu, R; Qian, Y; Deng, J (2012). "The characteristics of blood glucose and WBC counts in peripheral blood of cases of hand foot and mouth disease in China: a systematic review". PLoS One 7 (1): e29003. doi:10.1371/journal.pone.0029003. PMID 22235257.
- Ooi, MH; Wong, SC; Lewthwaite, P; Cardosa, MJ; Solomon, T (2010). "Clinical features, diagnosis, and management of enterovirus 71". Lancet Neurology 9 (11): 1097–1105. doi:10.1016/S1474-4422(10)70209-X. PMID 20965438.
- Kaminska, K; Martinetti, G; Lucchini, R; Kaya, G; Mainetti, C (2013). "Coxsackievirus A6 and Hand, Foot, and Mouth Disease: Three Case Reports of Familial Child-to-Immunocompetent Adult Transmission and a Literature Review". Case Reports in Dermatology 5 (2): 203–209. doi:10.1159/000354533. PMID 24019771.
- Hoy, NY; Leung, AK; Metelitsa, AI; Adams, S (2012). "New concepts in median nail dystrophy, onychomycosis, and hand, foot and mouth disease nail pathology". ISRN Dermatology 2012 (680163). doi:10.5402/2012/680163. PMID 22462009.
- Sarma, N (March-April 2013). "Hand, foot and mouth disease: current scenario and Indian perspective". Indian Journal of Dermatology, Venereology, and Leprology 79 (2): 165–175. doi:10.4103/0378-6323.107631. PMID 23442455.
- "Hand, Foot and Mouth Disease: Signs & Symptoms". mayoclinic.com. The Mayo Clinic. Retrieved May 5, 2008.
- "HAND". babymd.net. Baby MD. Retrieved April 7, 2012.
- "Hand, Foot and Mouth Disease". Complications. Centers for Disease Control and Prevention. 2011. Retrieved 14 October 2013.
- "Hand, Foot and Mouth Disease". Prevention and Treatment. Centers for Disease Control and Prevention. 2013. Retrieved 18 October 2013.
- See also reports from Sarawak Health Department http://www.sarawak.health.gov.my/hfmd.htm#INFO13
- Centers for Disease Control and Prevention (CDC) (1998). "Deaths among children during an outbreak of hand, foot, and mouth disease--Taiwan, Republic of China, April–July 1998". MMWR Morb. Mortal. Wkly. Rep. 47 (30): 629–32. PMID 9704628.
- Ho M, Chen ER, Hsu KH, et al. (1999). "An epidemic of enterovirus 71 infection in Taiwan. Taiwan Enterovirus Epidemic Working Group". N. Engl. J. Med. 341 (13): 929–35. doi:10.1056/NEJM199909233411301. PMID 10498487.
- "China reports 537 deaths from hand-foot-mouth disease this year". english.news.cn. 2010. Retrieved 16 October 2013.
- Mass intestinal virus infection kills 19 children – XinHuaNet.com (Retrieved on May 2, 2008.)
- Mass intestinal virus infection in east China up to 2,477, kills 21 – XinHuaNet.com (Retrieved on May 2, 2008.)
- China on alert as virus spreads
- Spreading virus kills 28 children (Retrieved on May 7, 2008.)
- "China virus toll continues rise". BBC News. May 5, 2008. Retrieved May 4, 2010.
- China on alert over deadly child virus (Retrieved on May 3, 2008.)
- Viet Nam News: HFMD cases prompt tighter health screening at airport (accessed May 15, 2008)
- EV-71 Virus Continues Dramatic Rise (accessed May 23, 2008)
- Bandar Seri Begawan (07 November 2008). "1,053 HFD cases recorded". The Birmingham News. Retrieved May 11, 2012.
- "Hand-foot-mouth disease death toll rises to 17 in East China's Shandong Province". China View. April 9, 2009. Retrieved September 29, 2009.
- "Health Ministry: Hand-foot-mouth disease claims 50 lives this year". China View. 10 April 2009. Retrieved 29 September 2009.
- "Childhood Virus Kills 70 In Vietnam". NPR. July 29, 2011. Retrieved September 11, 2011.
- "China reports 537 deaths from hand-foot-mouth disease this year". People's Daily Online. 2010. Retrieved 16 October 2013.
- "Coxsackievirus A6 (CVA6)". California Department of Public Health. 2013. Retrieved 16 October 2013.
- Hannah Wolfson (February 13, 2012). "Outbreak of hand, foot and mouth disease severe in Alabama". The Birmingham News. Retrieved May 11, 2012.
- CBS News Staff (2012). "Joint Press Release Between The Ministry of Health Kingdom of Cambodia and the World Health Organization". CBS News. Retrieved 16 October 2013.
- "Mysterious deadly illness in Cambodian children tied to hand, foot and mouth disease". Hand, Foot and Mouth Disease. World Health Organization. 2012. Retrieved 16 October 2013.
- "Global Alert and Response (GAR)". Undiagnosed illness in Cambodia-update. World Health Organization. 2012. Retrieved 16 October 2013.
- "Emerging disease surveillance and response". Hand, Foot and Mouth Disease. World Health Organization. 2013. Retrieved 16 October 2013.
Media related to Hand, foot and mouth disease at Wikimedia Commons News related to Highly contagious Hand, foot and mouth disease killing China's children at Wikinews