Chronic bilateral otomycosis caused by Aspergillus niger.
Aspergillus niger, an opportunistic filamentous fungus, was identified as the cause of chronic bilateral otomycosis in a 46-year-old female patient who was unresponsive to different drugs. The patient showed signs of erythema, otalgia, itching, otorrhoea and presence of greyish black coloured mass in both the ear canals. The direct microscopical examination of the ear debris in potassium hydroxide preparations, Giemsa, phase contrast and Gram revealed many thin, branched septate hyphae, condia and conidiophores morphologically indistinguishable from Aspergillus spp. The histopathological section of the ear wax mass by haematoxylin and eosin and periodic acid-Schiff techniques also showed similar fungal elements. The patient responded to 1% solution of mercurochrome. The use of mercurochrome in developing countries like India may be recommended to treat the fungal otitis in patients. We also emphasize that 'Narayan' stain should be routinely employed by microbiology and public health laboratories to study the morphology of pathogenic fungi.
Mishra
G S
GS
Department of ENT, Shree Krishna Hospital and Pramukhswami Medical College, Karamsad, Gujarat, India. dakshagiri@yahoo.com
Mehta
Niral
N
Pal
M
M
D000891:Anti-Infective Agents, Local / Q000494:pharmacology / Q000627:therapeutic use; D001228:Aspergillosis / Q000188:drug therapy / Q000382:microbiology* / Q000473:pathology; D001234:Aspergillus niger / Q000166:cytology / Q000187:drug effects / Q000302:isolation & purification*; D002571:Cerumen / Q000382:microbiology; D002908:Chronic Disease; D004433:Earache; D004890:Erythema; D005260:Female; D006801:Humans; D025301:Hyphae / Q000166:cytology; D008622:Merbromin / Q000494:pharmacology / Q000627:therapeutic use; D008875:Middle Aged; D010032:Otitis Externa / Q000188:drug therapy / Q000382:microbiology* / Q000473:pathology; D011537:Pruritus
D000891:Anti-Infective Agents, Local; D008622:Merbromin