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Actinomycetoma in SE Asia: the first case from Laos and a review of the literature
© Rattanavong et al.; licensee BioMed Central Ltd. 2012
Received: 15 August 2012
Accepted: 10 December 2012
Published: 12 December 2012
Mycetoma is a chronic, localized, slowly progressing infection of the cutaneous and subcutaneous tissues caused either by fungi (eumycetoma or implantation mycosis) or by aerobic actinomycetes (actinomycetoma). It is acquired by traumatic implantation, most commonly in the tropics and subtropics, especially in rural agricultural communities. Although well recognized elsewhere in Asia, it has not been reported from the Lao People’s Democratic Republic (Laos).
A 30 year-old female elementary school teacher and rice farmer from northeast Laos was admitted to Mahosot Hospital, Vientiane, with a massive growth on her left foot, without a history of trauma. The swelling had progressed slowly but painlessly over 5 years and multiple draining sinuses had developed. Ten days before admission the foot had increased considerably in size and became very painful, with multiple sinuses and discharge, preventing her from walking. Gram stain and bacterial culture of tissue biopsies revealed a branching filamentous Gram-positive bacterium that was subsequently identified as Actinomadura madurae by 16S rRNA gene amplification and sequencing. She was treated with long-term co-trimoxazole and multiple 3-week cycles of amikacin with a good therapeutic response.
We report the first patient with actinomycetoma from Laos. The disease should be considered in the differential diagnosis of chronic skin and bone infections in patients from rural SE Asia.
KeywordsMycetoma Madura foot Actinomadura madurae Lao PDR Laos Southeast Asia
Mycetoma, commonly known as Madura foot, is a chronic, localized, slowly progressive, granulomatous infection of the deep dermis and subcutaneous tissue caused either by fungi (eumycetoma or implantation mycosis) or by aerobic actinomycetes (actinomycetoma) . It was first described in India by Gill in 1842 and the term mycetoma was first used by Carter in 1860 [1, 2]. Mycetoma occurs unevenly worldwide but is endemic in tropical and sub-tropical regions, particularly between latitudes 15° S and 30° N, known as the ‘Mycetoma belt’. The belt includes Sudan, Somalia, Senegal, India, Yemen, Mexico, Venezuela, Colombia and Argentina. In Sudan, 1231 cases were reported within a 2.5-year period and it was found to be the third commonest cause of amputation [3, 4]. Cases imported from endemic areas are occasionally seen in temperate countries .
More than 20 species of bacteria and fungi have been identified as aetiologic agents of mycetoma: approximately 60% of cases are due to bacteria and 40% are caused by fungi. The predominant cause varies geographically, probably because of environmental factors . In India, Mexico and Brazil, actinomycetoma is the most common but in Sudan most cases are implantation mycoses. The agents most often responsible for causing actinomycetoma are Actinomadura madurae, Actinomadura pelletieri, Nocardia brasiliensis and Streptomyces somaliensis. Madurella mycetomatis, M. grisea and Pseudallescheria boydii are the most common causes of implantation mycoses [7–11]. Actinomycetoma tends to progress more rapidly, with greater inflammation and tissue destruction and earlier invasion of bone than implantation mycosis. Initially, the patient may feel pain or discomfort at the inoculated site. After traumatic inoculation, painless subcutaneous nodules slowly develop and spread. Later, the nodules increase in size and quantity with accompanying sinuses that drain serous, sero-sanguineous or purulent fluid . The main route of infection is uncertain but, as organisms are usually present in the soil , it is likely that they are implanted into the host tissue by traumatic inoculation such as thorn pricks or splinters, although only half of the patients can remember a history of trauma preceding the disease . This theory is supported by the facts that cases are common among farmers, herdsmen, field labourers or people walking bare foot and that the main affected areas are foot and hand, although other parts may be involved less frequently [12, 14–16]. The incubation period is variable, from three months to nine years in natural infections. Since the mean duration before the first medical evaluation is five years, patient recall of trauma may often be unreliable [7, 17].
Mycetoma is more common in males than females, with an overall sex ratio of 3:1, possibly relating to differences in occupational and other outdoor activities rather than gender differences in susceptibility [11, 15]. The condition is also commonest in young adults (16–40 years old) .
Irrespective of the causative agent, the clinical presentation is similar, with tissue swelling and draining sinuses that usually discharge visible grains. It is important to determine the causative agent of mycetoma in order to choose the appropriate treatment. The colour of the grains in the discharge from the sinuses may be helpful for presumptive identification of the aetiology, although this is not entirely reliable. Black grains are said to be associated with Madurella mycetomatis, Madurella grisea, Exophiala jeanselmei, Curvularia species, Leptosphaeria species and Pyrenochaeta species, white grains with Nocardia species, Actinomadura madurae, Pseudallescheria boydii, Acremonium species, Cylindrocarpon species and Fusarium species, yellow grains with Streptomyces somaliensis and red with Actinomadura pelletieri[3, 14]. Differential diagnosis includes soft tissue tumours such as lipoma, fibroma, sarcoma, malignant melanoma and chronic osteomyelitis caused by pyogenic bacteria or mycobacteria, and other mycoses such as chromoblastomycosis, lobomycosis, paracoccidioidomycosis, phaeohyphomycosis and sporotrichosis .
Although cases have been reported from neighbouring countries, mycetoma has never been reported in Laos: we report here the first case.
Our patient represents a fairly typical, albeit severe, case of actinomycetoma caused by A. madurae, with involvement of the underlying bone. Bone involvement is common in advanced stages of the disease (an incidence of 73% was reported in one series), leading to deformity and disability of the affected area .
Even a classic clinical presentation and typical colours of grains in mycetoma does not reliably distinguish actinomycetoma from implantation mycosis, so laboratory investigations, including microscopy, histology and extended cultures are indicated. Other investigations including fine needle aspiration cytology, imaging (X-ray, magnetic resonance and ultrasound), sero-diagnosis (counter-immunoelectrophoresis and ELISA) and molecular detection and identification may also be useful [14, 18]. Although the evidence base is poor, without clinical trials, combined treatment with multiple antibiotics is usually recommended in order to prevent drug resistance and eradicate any residual infection. Reported cure rates vary widely ranging from 60% to 90%. Sulphonamides and sulphonamide combinations are recommended as the first line treatment. Aminoglycosides, tetracyclines, rifampicin, ciprofloxacin and amoxicillin-clavulanate have also been used successfully. The combination of amikacin and co-trimoxazole, the former given in cycles, has produced excellent clinical results, especially in those at risk of pulmonary spread or vertebral involvement . Five to ten cycles may be needed to achieve cure. Furthermore, surgery may be considered for small lesions, infections that fail to respond to antibiotics and to help medical treatment by reduction of the infective load or deal with life-threatening lesions [12, 14, 18, 20].
Summary of reports of Mycetoma in Southeast Asia
Histology and culture
Histology and culture
Histology and culture
Histology and culture
Grains and radiography
Histology and culture
Nocardia asteroides (6 cases); N. caviae (2 cases); N. brasiliensis (2 cases); N. rosatii (1 case); Madurella mycetomii (3 cases); A. boydii (1 case); P. jeanselmei (1 case) and Strep. madurae (1 case).
Histology and culture
Only one case was confirmed by culture as Cladosporium carrionii
This patient confirms the existence of mycetoma caused by Actinomadura madurae in Laos. Approximately 78% of the Lao population works mainly in agriculture and there are, as elsewhere in the rural tropics, few microbiology laboratories, making it likely that the condition is under-diagnosed. Isolation of the causative organism enabled medical treatment, which almost certainly saved this young woman from amputation and lifelong disability. Mycetoma should be considered in the differential diagnosis of chronic skin and bone infections in Laos and elsewhere in Southeast Asia.
Written informed consent was obtained from the patient for publication of this Case report and any accompanying images. A copy of the written consent is available for review from the Series Editor of this journal.
We are grateful to the patient and all the staff of the Microbiology Laboratory and surgeons and nurses of the Surgery Ward, Mahosot Hospital, Vientiane, Laos, and to the Minister of Health and the Director of the Curative Department, Ministry of Health, for their support. This work was part of the Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit funded by the Wellcome Trust of Great Britain.
- Fahal AH, Hassan MA: Mycetoma. Br J Surg. 1992, 79: 1138-1141. 10.1002/bjs.1800791107.View ArticlePubMedGoogle Scholar
- Muttardi NE, Kulendren D, Jemec B: Madura foot-mind the soil. J Plast Reconstr Aesthet Surg. 2010, 63: e576-e578. 10.1016/j.bjps.2009.12.007.View ArticlePubMedGoogle Scholar
- Ahmed AOA, Leeuwen WV, Fahal A, Sande WV, Verbrugh H, Belkum AV: Mycetoma caused by Madurella mycetomatis: a neglected infectious burden. Lancet Infect Dis. 2004, 4: 566-574. 10.1016/S1473-3099(04)01131-4.View ArticlePubMedGoogle Scholar
- Shaheen SM: Patients with lower limb amputations for mycetoma in the National Center for Prosthetics and Orthotics in the Sudan. Khartoum Med J. 2008, 1: 27-29.Google Scholar
- Hay RJ, Mackenzie DWR: Mycetoma (Madura foot) in the United Kingdom-a survey of forty-four cases. Clin Exp Dermatol. 1983, 8: 553-562. 10.1111/j.1365-2230.1983.tb01823.x.View ArticlePubMedGoogle Scholar
- Welsh O, Vera-Cabrera L, Salinas-Carmona MC: Mycetoma. Clin Dermatol. 2007, 25: 195-202.View ArticlePubMedGoogle Scholar
- Maiti PK, Ray A, Bandyopadhyay S: Epidemiological aspects of mycetoma from a retrospective study of 264 cases in West Bengal. Trop Med Int Health. 2002, 7: 788-792. 10.1046/j.1365-3156.2002.00915.x.View ArticlePubMedGoogle Scholar
- Papaioannides D, Akritidis NK: Painless foot swelling with a chronic purulent discharge. West J Med. 2001, 174: 96-97. 10.1136/ewjm.174.2.96.View ArticlePubMedPubMed CentralGoogle Scholar
- López Martínez R, Méndez Tovar LJ, Lavalle P, Welsh O, Saúl A, Macotela Ruíz E: Epidemiology of mycetoma in Mexico: study of 2105 cases. Gac Med Mex. 1992, 128: 477-481.PubMedGoogle Scholar
- Castro LG, Belda Júnior W, Salebian A, Cucé LC: Mycetoma: a retrospective study of 41 cases seen in Sao Paulo, Brazil, from 1978 to 1989. Mycoses. 1993, 36: 89-95.View ArticlePubMedGoogle Scholar
- Fahal AH, Abu Sabaa AH: Mycetoma in children in Sudan. Trans R Soc Trop Med Hyg. 2010, 104: 117-121. 10.1016/j.trstmh.2009.07.016.View ArticlePubMedGoogle Scholar
- Fahal AH: Mycetoma: a thorn in the flesh. Trans R Soc Trop Med Hyg. 2004, 98: 3-11. 10.1016/S0035-9203(03)00009-9.View ArticlePubMedGoogle Scholar
- Aghamirian MR, Ghiasian SA: Isolation and characterization of medically important aerobic Actinomycetes in soil of Iran (2006–2007). Open Microbiol J. 2009, 3: 53-57. 10.2174/1874285800903010053.View ArticlePubMedPubMed CentralGoogle Scholar
- Fahal AH: Mycetoma. Khartoum Med J. 2011, 4: 514-523.Google Scholar
- Hashemi SJ, Nasrollahi A, Guerami M, Daei R, Pakshir K, Zibafar A: Mycetoma in Iran: study of 62 cases. Asian J Epidemiol. 2008, 1: 77-81. 10.3923/aje.2008.77.81.View ArticleGoogle Scholar
- Tilak R, Singh S, Garg A, Bassi J, Tilak V, Gulati AK: A case of Actinomycotic mycetoma involving the right foot. J Infect Developing Countries. 2009, 3: 71-73.View ArticleGoogle Scholar
- Dieng MT, Sy MH, Diop BM, Niang SO, Ndiaye B: Mycetoma: 130 cases. Ann Dermatol Venereol. 2003, 130: 16-19.PubMedGoogle Scholar
- Lichon V, Khachemoune A: Mycetoma. Am J Clin Dermatol. 2006, 7: 315-321. 10.2165/00128071-200607050-00005.View ArticlePubMedGoogle Scholar
- Edwards KJ, Logan JMJ, Langham S, Swift C, Gharbia S: Utility of real-time amplification of selected 16S rRNA gene sequences as a tool for detection and identification of microbial signatures directly from clinical samples. J Med Microbiol. 2012, 61: 645-652. 10.1099/jmm.0.041764-0.View ArticlePubMedGoogle Scholar
- Welsh O, Sauceda E, Gonzales J, Ocampo J: Amikacin alone and in combination with trimethoprim-sulfamethoxazole in the treatment of actinomycotic- mycetoma. J Am Acad Dermatol. 1987, 17: 443-448. 10.1016/S0190-9622(87)70227-8.View ArticlePubMedGoogle Scholar
- Ameen M, Arenas R: Developments in the management of mycetomas. Clin Exp Dermatol. 2008, 34: 1-7.View ArticleGoogle Scholar
- Abd Bagi ME, Fahal AH, El Sheik H, Abdul Wahab O, Taifoor MK, Osmanr EM: Pathological fractures in mycetoma. Trans R Soc Trop Med Hyg. 2003, 97: 582-584. 10.1016/S0035-9203(03)80036-6.View ArticlePubMedGoogle Scholar
- Khoo TK, Rekhraj IR: Mycetoma pedis (Maduramycosis) in an Indian in Singapore. Singapore Med J. 1967, 8: 269-270.PubMedGoogle Scholar
- Geh GS: A case of madura foot successfully treated with large doses of intravenous crystalline penicillin. Med J Malaya. 1969, 24: 147-150.PubMedGoogle Scholar
- Kutty MK, Bau K: Maduramycosis in a Chinese in West Malaysia. Med J Malaya. 1969, 24: 151-153.PubMedGoogle Scholar
- Soo-Hoo TS, David CV: The first reported case of mycetoma caused by Streptomyces somaliensis in Malaysia. Aust J Derm. 1982, 23: 87-89. 10.1111/j.1440-0960.1982.tb00608.x.View ArticleGoogle Scholar
- Simuangco SA, Bocobo FC, Lacuna L: Review of literature on medical mycology in the Philippines, 1955–1962. Mycopathol Mycol Appl. 1963, 20: 145-156. 10.1007/BF02054886.View ArticlePubMedGoogle Scholar
- Reyes AC, Tangco AF, Punsalang AP: Maduromycosis (maduromycotic mycetoma) in the Philippines caused by Madurella grisea. Southeast Asian J Trop Med Public Health. 1971, 2: 17-21.PubMedGoogle Scholar
- de Hoog GS, van Diepeningen AD, Mahgoub e-S, van de Sande WW: New species of Madurella, causative agents of black-grain mycetoma. J Clin Microbiol. 2012, 50: 988-994. 10.1128/JCM.05477-11.View ArticlePubMedPubMed CentralGoogle Scholar
- Harahap M, Nasution MA: Dermatomycoses in Indonesia. Int J Dermatol. 1984, 23: 273-274. 10.1111/j.1365-4362.1984.tb01247.x.View ArticlePubMedGoogle Scholar
- Andre M, Brumpt V, Destombes P, Segretain G: Fungal mycetoma with black grains due to Pyrenochaeta romeroi in Cambodia. Bull Soc Pathol Exot Filiales. 1968, 61: 108-112.PubMedGoogle Scholar
- Tournier Lasserve C, Sun SK, Despruniee J: Osseous mycosis caused by mycetoma with black granules in Cambodia. Med Trop. 1965, 25: 646-648.Google Scholar
- Kotrajaras R: Mycetoma, a review of seventeen cases seen at the Institute of Dermatology, Bangkok, Thailand. J Dermatol. 1981, 8: 133-137.View ArticlePubMedGoogle Scholar
- Mahaisavariya P, Chaiprasert A, Sivayathorn A, Khemngern S: Deep fungal and higher bacterial skin infections in Thailand: clinical manifestations and treatment regimens. Int J Dermatol. 1999, 38: 279-284. 10.1046/j.1365-4362.1999.00681.x.View ArticlePubMedGoogle Scholar
- Freland C, Fur JL, Nemirovsky-Trebucq B, Lelong P, Boiron P: Primary cutaneous nocardiosis caused by Nocardia otitidiscaviarum: two cases and a review of the literature. J Trop Med Hyg. 1995, 98: 395-403.PubMedGoogle Scholar
- The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2334/12/349/prepub
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