- Case Report
- Open Access
First observation in a non-endemic country (Togo) of Penicillium marneffei infection in a human immunodeficiency virus-infected patient: a case report
© Patassi et al.; licensee BioMed Central Ltd. 2013
Received: 14 July 2013
Accepted: 3 December 2013
Published: 4 December 2013
Infection with Penicillium marneffei is a common opportunistic infection in Southeast Asia where it is endemic. We report a case of Penicillium marneffei infection with fatal outcome in a Togolese woman infected with Human Immunodeficiency Virus (HIV).
A 45-years-old patient, infected with Human Immunodeficiency Virus had consulted for ongoing febrile pneumonia since two weeks. Clinical examination revealed fever of 38.5°C, dyspnea, pulmonary syndrome condensation and papulo-nodular of “molluscum contagiosum” like lesions located on the face, arms, neck and trunk. Sputum smear was negative for tuberculosis. The chest radiograph showed reticulonodular opacities in the right upper and middle lobes and two caves in the right hilar region. The CD4 count was 6 cells/mm3 after a year of antiretroviral treatment (Zidovudine-Lamivudine-Efavirenz). She was treated as smear negative pulmonary tuberculosis after a lack of gentamicin and amoxicillin plus clavulanic acid response. Culture of skin samples and sputum had revealed the presence of P. marneffei. A treatment with ketoconazole 600 mg per day was initiated. After two weeks of treatment, there was a decrease in the size and number of papules and nodules, without any new lesions. We noted disappearance of cough and fever. The chest X-ray showed a decrease of pulmonary lesions. There was no reactivation of P. marneffei infection but the patient died from AIDS after two years of follow up.
We report a case of P. marneffei infection in a HIV-infected patient in a non-endemic country. Clinicians should think of P. marneffei infection in all HIV-infected patients with “molluscum contagiosum” like lesions.
Infection with P. marneffei is an opportunistic infection occurring in immuno compromised patients. It is endemic in South Asia and South-east Asia, where infection with P. marneffei ranks third behind tuberculosis and cryptococcosis in Thailand, and behind Pneumocystis carinii pneumonia (PCP) and pulmonary tuberculosis in Hong Kong among Human Immunodeficiency Virus (HIV) positive patients[2–4]. P. marneffei infection has also been reported in patients infected with HIV from non-endemic areas and who have stayed in endemic areas[5, 6]. We report a case of infection with P. marneffei with fatal outcome in a Togolese woman infected with HIV at the clinical World Health Organization (WHO) stage III of acquired immunodeficiency syndrome (AIDS).
There was also a syndrome of pulmonary consolidation characterized by increased vocal vibrations at the right lung, dullness at the base of right lung crackling rales at both lung bases.
Chest radiography showed reticulonodular opacities in upper and middle right lobes and two caves in the right hilar region. The CD4 count was 6 cells/mm3, the hemoglobin rate was 10 g/dl and the leukocytes count was 2 × 103 cells/μl. Smear was negative.
The patient was treated as bacterial pneumonia by the combination of amoxicillin-clavulanic acid and gentamicin for ten days without success, then as smear negative pulmonary tuberculosis with two months combination of (rifampicin + isoniazid + pyrazinamide + ethambutol) followed by four months combination of (rifampicin + isoniazid) protocol.
A treatment with ketoconazole 600 mg per day was initiated. After two weeks of treatment, there was a decrease in the size and number of papules and nodules, without any new skin lesions. We noted disappearance of cough and fever. The chest X-ray showed a decrease of pulmonary lesions. There was no reactivation of P. marneffei infection but the patient died from AIDS after two years of follow up since his first consultation in the department of infectious diseases.
Penicillium marneffei infection has been reported as an endemic disease in patients with immunodeficiency in Thailand, China, Vietnam, Taiwan, Singapore and India.
The first reported case in West Africa occurred in a HIV positive patient originated from Ghana who had never traveled to tropical Asia. Besides this case, several cases were reported among Africans who have traveled or resided in endemic countries[8–11]. In our opinion, the first case reported here in Togo and the case reported in Yo (Ghana) describe for the first time this infection in West Africa, an area that is far from the geographic reservoir. The natural reservoir, mode of transmission and the natural history of infection with P. marneffei are not clearly defined so far and remain research topics. The only known natural hosts are the bamboo rats (Rhizomys and Cannomys spp.) and humans. P. marneffei can be isolated from soil and rarely from other environmental sources. Activities during the rainy season are also cited to be associated with the risk of exposure in endemic countries. It is believed that humans are infected by inhaling infectious agent and rarely by direct animal contact. Inhaled spores are phagocytosed by pulmonary histiocytes that are disseminated in the body of the host and can cause a systemic infection. Person to person transmission of P. marneffei infection is not described nowadays.
The appearance of this infection in a Togolese patient remains enigmatic. Unfortunately, the epidemiological case investigation has not been made. But in 2000, the description of P. marneffei infection in a patient originating from Ghana which shares border with Togo may infer the existence of this fungal pathogen in these two countries. The development of maritime trade with the arrival of boats from Asia on the West African coasts could be ways of transmission and “colonization” of these coasts by the fungal.
The clinical features of penicilliosis are diverse and multifaceted and constitute a challenge in term of diagnostic for clinicians. The clinical outcome of penicilliosis can be fatal if it is not treated. Among the HIV-infected patients naive of antiretroviral therapy, penicilliosis is a sign of severe and late stage of HIV infection[12, 14]. Our patient has immuno-clinical antiretroviral therapy failure (CD4 count 6 cells/mm3) corresponding to severe immunodeficiency. The patient has presented non-specific symptoms such as fever, anemia, productive cough and deterioration in general condition. These symptoms may reveal bacterial pneumonia or lung’s tuberculosis. These non-specific clinical signs and symptoms have justified the treatment with beta-lactam antibiotic associated with gentamicin and antituberculosis drugs. The evolution under this treatment was not favorable after two months. Moreover, the pulmonary manifestations of bacterial pneumonia do not associate skin lesion like molluscum contagiosum as found in the patient. Cutaneous manifestations features described in penicilliosis are translucent papular lesions, umbilicated with a central necrotic depression[13–16], similar to those presented by our patient on the face and trunk. These cutaneous manifestations are similar to skin lesions of cryptococcosis, histoplasmosis or molluscum contagiosum. However, the occurrence of these skin lesions in the context of fever, cough, dyspnea, weight lost and fatigue made us suggest infection with P. marneffei although the patient had always lived in Togo on the basis of a lack of clinical response to antibiotic treatment and culture on Sabouraud’s medium revealing a red pigment (Figure 2).
According to studies, culture from bone marrow, blood and skin samples are positive respectively at 100%, 76% and 90% of cases[13, 17–20]. The identification of P. marneffei is based on the characteristics of its colony and microscopic morphology, with filamentous branches, sometimes with smooth conidia (Figure 3). The first description of this disease was made in a patient with Hodgkin’s lymphoma in Southeast Asia. Before the first description of the disease in a HIV-infected patient in 1988, penicilliosis was uncommon, with less than 40 cases reported[9, 10].
Penicillium marneffei is highly sensitive to itraconazole, ketoconazole, voriconazole, miconazole, terbinafine and 5-fluorocytosine, amphotericin B, and less sensitive to fluconazole. The recommended treatment in penicilliosis is amphotericin B through intravenous route at a dose of 0.6 mg/kg per day for two weeks followed by 10 weeks of secondary prophylaxis with itraconazole (400 mg/day)[13, 18]. Ketoconazole orally at a dose of 600 mg a day was the available treatment to our patient in all phases. This treatment was combined with highly active antiretroviral therapy. (Tenofovir/Lamivudine and boosted by Lopinavir).
This second case in West Africa raises the problem of fungus’ reservoir and the route of its transmission.
Our observation reports a case of P. marneffei infection with fatal outcome in a patient infected with HIV in a non-endemic country. It invites clinicians to think of an infection with P. marneffei in all HIV-infected patients with lesions of molluscum contagiosum because only early diagnosis and proper treatment leads to a reduction in mortality associated with this disease.
Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
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