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Hand, foot, and mouth disease

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This article is about viral disease. For the chemotherapy-induced condition, see Chemotherapy-induced acral erythema. For the animal disease, see Foot-and-mouth disease. For the card game, see Canasta § Hand and Foot Canasta.

Hand, foot, and mouth disease (HFMD) is a common infection caused by a group of enteroviruses.[10] It typically begins with a fever and feeling generally unwell.[10] This is followed a day or two later by flat discolored spots or bumps that may blister, on the hands, feet and mouth and occasionally buttocks and groin.[1][2][11] Signs and symptoms normally appear 3–6 days after exposure to the virus.[4] The rash generally resolves on its own in about a week.[5]

Hand, foot, and mouth disease
Other namesEnteroviral vesicular stomatitis with exanthem
Small reddish spots and bumps around mouth in HFMD
SpecialtyInfectious disease
SymptomsFever, flat discolored spots or bumps that may blister[1][2]
ComplicationsTemporary loss of nails, viral meningitis[3]
Usual onset3–6 days post exposure[4]
Duration1 week[5]
CausesCoxsackievirus A16, Enterovirus 71[6]
Diagnostic methodBased on symptoms, viral culture[7]
PreventionHandwashing[8]
TreatmentSupportive care[5]
MedicationPain medication such as ibuprofen[9]
FrequencyAs outbreaks[1]

The viruses that cause HFMD are spread through close personal contact, through the air from coughing, and via the feces of an infected person.[8] Contaminated objects can also spread the disease.[8] Coxsackievirus A16 is the most common cause, and enterovirus 71 is the second-most common cause.[6] Other strains of coxsackievirus and enterovirus can also be responsible.[6][12] Some people may carry and pass on the virus despite having no symptoms of disease.[10] Other animals are not involved.[8] Diagnosis can often be made based on symptoms.[7] Occasionally, a throat or stool sample may be tested for the virus.[7]

Most people with hand, foot, and mouth disease get better on their own in 7 to 10 days.[8] Most cases require no specific treatment.[5] No antiviral medication or vaccine is available, but development efforts are underway.[13][14] For fever and for painful mouth sores, over-the-counter pain medications such as ibuprofen may be used, though aspirin should be avoided in children.[9] The illness is usually not serious. Occasionally, intravenous fluids are given to children who are dehydrated.[15] Very rarely, viral meningitis or encephalitis may complicate the disease.[3] Because HFMD is normally mild, some jurisdictions allow children to continue to go to child care and schools as long as they have no fever or uncontrolled drooling with mouth sores, and as long as they feel well enough to participate in classroom activities.[8]

HFMD occurs in all areas of the world.[16] It often occurs in small outbreaks in nursery schools or kindergartens.[1] Large outbreaks have been occurring in Asia since 1997.[16] It usually occurs during the spring, summer and fall months.[16] Typically it occurs in children less than five years old but can occasionally occur in adults.[1][10] HFMD should not be confused with foot-and-mouth disease (also known as hoof-and-mouth disease), which mostly affects livestock.[17]

Signs and symptoms

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Common constitutional signs and symptoms of the HFMD include fever, nausea, vomiting, feeling tired, generalized discomfort, loss of appetite, and irritability in infants and toddlers. Skin lesions frequently develop in the form of a rash of flat discolored spots and bumps which may be followed by vesicular sores with blisters on palms of the hands, soles of the feet, buttocks, and sometimes on the lips.[18] The rash is rarely itchy for children,[4] but can be extremely itchy for adults. Painful facial ulcers, blisters, or lesions may also develop in or around the nose or mouth.[1][19][20] HFMD usually resolves on its own after 7–10 days.[19] Most cases of the disease are relatively harmless, but complications including encephalitis, meningitis, and paralysis that mimics the neurological symptoms of polio can occur.[21]

  •  
    Rash on palms of the hands
  •  
    Rash on hands and feet of a 36-year-old man
  •  
    Rash on the soles of a child's feet

Cause

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The viruses that cause the disease are of the Picornaviridae family. Coxsackievirus A16 is the most common cause of HFMD.[6] Enterovirus 71 (EV-71) is the second-most common cause.[6] Many other strains of coxsackievirus and enterovirus can also be responsible.[6][12]

Transmission

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HFMD is highly contagious and is transmitted by nasopharyngeal secretions such as saliva or nasal mucus, by direct contact, or by fecal–oral transmission. It is possible to be infectious for days to weeks after the symptoms have resolved.[8]

Child care settings are the most common places for HFMD to be contracted because of toilet training, diaper changes, and children's propensity to put their hands into their mouths.[20] HFMD is contracted through nose and throat secretions such as saliva, sputum, nasal mucus and as well as fluid in blisters, and stool.[22]

Diagnosis

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A diagnosis usually can be made by the presenting signs and symptoms alone.[19] If the diagnosis is unclear, a throat swab or stool specimen may be taken to identify the virus by culture.[19] The common incubation period (the time between infection and onset of symptoms) ranges from three to six days.[4] Early detection of HFMD is important in preventing an outbreak in the pediatric population.[23]

Prevention

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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.[19][24]

Protective habits include hand washing and disinfecting surfaces in play areas.[22] Breast-feeding has also shown to decrease rates of severe HFMD, though does not reduce the risk for the infection of the disease.[22]

Vaccine

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A vaccine known as the EV71 vaccine is available to prevent HFMD in China as of December 2015.[25] No vaccine is currently available in the United States.[24]

Treatment

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Medications are usually not needed as hand, foot, and mouth disease is a viral disease that typically resolves on its own. Currently, there is no specific curative treatment for hand, foot and mouth disease.[19] 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 can help decrease body temperature.[citation needed]

A minority of individuals with hand, foot and mouth disease may require hospital admission due to complications such as inflammation of the brain, inflammation of the meninges, or acute flaccid paralysis.[12] Non-neurologic complications such as inflammation of the heart, fluid in the lungs, or bleeding into the lungs may also occur.[12]

Complications

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Complications from the viral infections that cause HFMD are rare, 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 including death than infections caused by Coxsackievirus A16.[19] Viral or aseptic meningitis can occur with HFMD in rare cases and is characterized by fever, headache, stiff neck, or back pain.[12][19] 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 (inflammation of the brain), or flaccid paralysis in rare circumstances.[18][19]

Fingernail and toenail loss have been reported in children 4–8 weeks after having HFMD.[4] The relationship between HFMD and the reported nail loss is unclear; however, it is temporary and nail growth resumes without treatment.[4][26]

Minor complications due to symptoms can occur such as dehydration, due to mouth sores causing discomfort with intake of foods and fluid.[27]

Epidemiology

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Hand, foot and mouth disease most commonly occurs in children under the age of 10[4][19] and more often under the age of 5, but it can also affect adults with varying symptoms.[20] It tends to occur in outbreaks during the spring, summer, and autumn seasons.[6] This is believed to be due to heat and humidity improving spread.[22] HFMD is more common in rural areas than urban areas; however, socioeconomic status and hygiene levels need to be considered.[28] Poor hygiene is a risk factor for HFMD.[29][better source needed]

Outbreaks

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  • In 1997, an outbreak occurred in Sarawak of Malaysia with 600 cases and over 30 children died.[30][31][32][33]
  • In 1998, there was an outbreak in Taiwan, affecting mainly children.[34] There were 405 severe complications, and 78 children died.[35] The total number of cases in that epidemic is estimated to have been 1.5 million.[6]
  • In 2008 an outbreak in China, beginning in March in Fuyang, Anhui, led to 25,000 infections, and 42 deaths, by May 13.[6] Similar outbreaks were reported in Singapore (more than 2,600 cases as of April 20, 2008),[36] Vietnam (2,300 cases, 11 deaths),[37] Mongolia (1,600 cases),[38] and Brunei (1053 cases from June–August 2008)[39]
  • 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.[40] Out of 115,000 reported cases in China from January to April, 773 were severe and 50 were fatal.[41]
  • 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.[42]
  • The World Health Organization reporting between January and 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).[43]
  • 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.[44]
  • 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.[45]
  • In 2012 in Cambodia, 52 of 59 reviewed cases of children reportedly[46] dead (as of July 9, 2012) due to a mysterious disease were diagnosed to be caused by a virulent form of HFMD.[47] Although a significant degree of uncertainty exists with reference to the diagnosis, the 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."[48]
  • HFMD infected 1,520,274 people with up to 431 deaths reported at the end of July in 2012 in China.[49]
  • In 2018, more than 50,000 cases have occurred through a nationwide outbreak in Malaysia with two deaths also reported.[50][51][52]

India 2022

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An outbreak of an illness referred to as tomato fever or tomato flu was identified in the Kollam district on May 6, 2022.[53] The illness is endemic to Kerala, India and gets its name because of the red and round blisters it causes, which look like tomatoes.[53] The disease may be a new variant of the viral HFMD or an effect of chikungunya or dengue fever.[53][54][55] Flu may be a misnomer.[54][56]

The condition mainly affects children under the age of five.[53][57] An article in The Lancet states that the appearance of the blisters is similar to that seen in Mpox, and the illness is not thought to be related to SARS-CoV-2.[53] Symptoms, treatment and prevention are similar to HFMD.[53]

History

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HFMD cases were first described clinically in Canada and New Zealand in 1957.[19] The disease was termed "Hand Foot and Mouth Disease", by Thomas Henry Flewett, after a similar outbreak in 1960.[58][59]

Research

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Novel antiviral agents to prevent and treat infection with the viruses responsible for HFMD are currently under development. Preliminary studies have shown inhibitors of the EV-71 viral capsid to have potent antiviral activity.[13]

References

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  1. ^ a b c d e f 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. PMC 3764954. PMID 24019771.
  2. ^ a b Ooi, MH; Wong, SC; Lewthwaite, P; Cardosa, MJ; Solomon, T (2010). "Clinical features, diagnosis, and management of enterovirus 71" (PDF). Lancet Neurology. 9 (11): 1097–1105. doi:10.1016/S1474-4422(10)70209-X. PMID 20965438. S2CID 17505751.
  3. ^ a b "HFMD Symptoms and Complications". CDC. May 7, 2024. Retrieved July 7, 2024.
  4. ^ a b c d e f g 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): 680163. doi:10.5402/2012/680163. PMC 3302018. PMID 22462009.
  5. ^ a b c d Longo, Dan L. (2012). Harrison's Principles of Internal Medicine (18th ed.). New York: McGraw-Hill. ISBN 978-0-07174889-6.
  6. ^ a b c d e f g h i Repass GL, Palmer WC, Stancampiano FF (September 2014). "Hand, foot, and mouth disease: Identifying and managing an acute viral syndrome". Cleve Clin J Med. 81 (9): 537–43. doi:10.3949/ccjm.81a.13132. PMID 25183845.
  7. ^ a b c "Diagnosis". CDC. August 18, 2015. Archived from the original on May 14, 2016. Retrieved May 15, 2016.
  8. ^ a b c d e f g "Causes & Transmission". CDC. August 18, 2015. Archived from the original on May 14, 2016. Retrieved May 15, 2016.
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  25. ^ Mao, QY; Wang, Y; Bian, L; Xu, M; Liang, Z (May 2016). "EV71 vaccine, a new tool to control outbreaks of hand, foot and mouth disease (HFMD)". Expert Review of Vaccines. 15 (5): 599–606. doi:10.1586/14760584.2016.1138862. PMID 26732723. S2CID 45722352.
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  28. ^ Koh, Wee Ming; Bogich, Tiffany; Siegel, Karen; Jin, Jing; Chong, Elizabeth Y.; Tan, Chong Yew; Chen, Mark IC; Horby, Peter; Cook, Alex R. (October 2016). "The Epidemiology of Hand, Foot and Mouth Disease in Asia: A Systematic Review and Analysis". The Pediatric Infectious Disease Journal. 35 (10): e285–e300. doi:10.1097/INF.0000000000001242. ISSN 0891-3668. PMC 5130063. PMID 27273688.
  29. ^ "Hand-Foot-and-Mouth Disease". WebMD. Retrieved November 28, 2017.
  30. ^ L. G. Chan; Umesh D. Parashar; M. S. Lye; F. G. L. Ong; Sherif R. Zaki; James P. Alexander; K. K. Ho; Linda L. Han; Mark A. Pallansch; Abu Bakar Suleiman; M. Jegathesan; Larry J. Anderson (2000). "Deaths of Children during an Outbreak of Hand, Foot, and Mouth Disease in Sarawak, Malaysia: Clinical and Pathological Characteristics of the Disease". Clinical Infectious Diseases. 31 (3): 678–683. doi:10.1086/314032. PMID 11017815 – via Oxford Academic.
  31. ^ Academy of Medicine (Singapore) (2003). Annals of the Academy of Medicine, Singapore. Academy of Medicine. p. 385. In April 1997, in Sarawak, Malaysia, 600 cases of HFMD were admitted and over 30 children died.
  32. ^ Yoke Fun-Chan; I-Ching Sam; Kai-Li Wee; Sazaly Abu Bakar (2011). "Enterovirus 71 in Malaysia: A decade later" (PDF). Neurology Asia. 16 (1). Archived (PDF) from the original on August 29, 2019. Retrieved August 29, 2019 – via University of Malaya.
  33. ^ Nur Najihah Hasan (2017). "Assessing the Prevalence of Hand, Foot and Mouth Disease (HFMD) Using Geospatial Density and Distribution Techniques" (PDF). Faculty of Geoinformation and Real Estate: 2–3 [18–35]. Archived (PDF) from the original on August 29, 2019. Retrieved August 29, 2019 – via Universiti Teknologi Malaysia.
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  36. ^ 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.
  37. ^ Viet Nam News: HFMD cases prompt tighter health screening at airport Archived February 13, 2009, at the Wayback Machine(accessed May 15, 2008)
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  39. ^ Bandar Seri Begawan (November 7, 2008). "1,053 HFD cases recorded". The Birmingham News. Archived from the original on July 22, 2012. Retrieved May 11, 2012.
  40. ^ "Hand-foot-mouth disease death toll rises to 17 in East China's Shandong Province". China View. April 9, 2009. Archived from the original on April 13, 2009. Retrieved September 29, 2009.
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  44. ^ "Coxsackievirus A6 (CVA6)". California Department of Public Health. 2013. Archived from the original on October 17, 2013. Retrieved October 16, 2013.
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  46. ^ CBS News Staff (2012). "Joint Press Release Between The Ministry of Health Kingdom of Cambodia and the World Health Organization" (PDF). CBS News. Archived (PDF) from the original on October 17, 2013. Retrieved October 16, 2013.
  47. ^ "Mysterious deadly illness in Cambodian children tied to hand, foot and mouth disease". Hand, Foot and Mouth Disease. World Health Organization. 2012. Archived from the original on June 3, 2013. Retrieved June 7, 2022.
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  50. ^ Martin Carvalho; Hemananthani Sivanandam; Rahimy Rahim; Loshana K Shagar (August 16, 2018). "Over 50,000 cases of HFMD recorded, virus strain relatively benign". The Star. Retrieved August 29, 2019. Over 50,000 cases of hand, foot and mouth disease (HFMD) stemming from the Coxsackie virus have been reported since the outbreak of the disease.
  51. ^ Katrina Khairul Azman (July 29, 2018). "A 2-Year-Old Boy In Sarawak Suffering From HFMD Has Died". Says.com. Archived from the original on August 29, 2019. Retrieved August 29, 2019.
  52. ^ "17-month-old boy's death in Penang due to HFMD". The Star. July 30, 2018. Retrieved August 29, 2019.
  53. ^ a b c d e f Chavda VP, Patel K, Apostolopoulos V (August 2022). "Tomato flu outbreak in India". Lancet Respir Med. 11 (1): e1–e2. doi:10.1016/S2213-2600(22)00300-9. PMC 9385198. PMID 35987204.
  54. ^ a b "It's not tomato flu, fever caused by HFMD virus variant: Health Secy Radhakrishnan". The New Indian Express. May 14, 2022. Retrieved June 16, 2022.
  55. ^ "Tomato flu in Kerala: No need to panic, authorities instructed to be vigilant". livemint.com. May 11, 2022. Retrieved June 30, 2022.
  56. ^ "Tomato fever or HFMD virus in Kerala? Know causes, and symptoms of HFMD". Zee News. May 15, 2022. Retrieved June 16, 2022.
  57. ^ Thiagarajan K (August 2022). "Reports of "tomato flu" outbreak in India are not due to new virus, say doctors". BMJ. 378: o2101. doi:10.1136/bmj.o2101. PMID 36028244. S2CID 251814659.
  58. ^ Alsop J, Flewett TH, Foster JR (December 1960). ""Hand-foot-and-mouth disease" in Birmingham in 1959". British Medical Journal. 2 (5214): 1708–11. doi:10.1136/bmj.2.5214.1708. PMC 2098292. PMID 13682692.
  59. ^ Flewett TH, Warin RP, Clarke SK (January 1963). "'Hand, foot, and mouth disease' associated with Coxsackie A5 virus". Journal of Clinical Pathology. 16 (1): 53–5. doi:10.1136/jcp.16.1.53. PMC 480485. PMID 13945538.
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