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Diagnosing coccidioidomycosis outside an endemic area

✍ Scribed by Lucia Kapica; Elias Matouk; Marie Alix D'Halewyn


Book ID
104773243
Publisher
Springer Netherlands
Year
1983
Tongue
English
Weight
974 KB
Volume
82
Category
Article
ISSN
0301-486X

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✦ Synopsis


A 65-year-old female with a long-standing controlled Crohn's disease was admitted in August 1979 to a Montreal hospital for investigation of a non-calcified RUL lung nodule. After an extensive work-up (negative bronchoscopy and mediastinoscopy showing a granulomatous reaction) she underwent thoracotomy; the nodule was enucleated and showed caseous material within a fibrous capsule.

Cultures in mycology produced a heavy growth of Coccidioides immitis, a diphasic pathogenic fungus endemic in South Western USA, identified by its morphology in autoclaved cultures, reversion to the spherule phase in mice and a !:80 immunofluorescent stain with both commercial and patient's serum.

The patient, who travelled to Arizona three times in recent years, was soon discharged and remains apparently well. Because of inherent risks from handling cultures of C. immitis, the authors urge that, when coccidioidomycosis is considered clinically and epidemiologically, the pertinent information be transmitted to the laboratory.

R~sum~

Une patiente de 65 ans pr6sentant une ill6ite r6gionale control6e depuis plusieures ann6es, rut admise hun h6pital montr6alais pour 6rude d'un nodule non-calcifi6 sans cavit6, au lobe sup6rieur droit, Apr~s de nombreuses analyses, dont une bronchoscopie n6gative et une m6diastinoscopie d6montrant une r6action granulomateuse, la patiente subit une thoracotomie: le nodule 6nuc166 6tait compos6 de matibre cas6euse entour6e d'une capsule fibreuse.

Les cultures pour champignons d6montrbrent la pr6sence de Coccidioides immitis, champignon pathogbne dimorphique, end6mique dans le sud-ouest am6ricain, dont l'identification fut bas6e sur les crit6res morphologiques de la culture autoclav6e, la r6version h la phase 'sph6rules' sur souris, et par 6preuve d'immunofluorescence directe avec un s6rum commercial et s6rum de la patiente.

Cette patiente qui avait voyag6 3 fois en Arizona depuis quelques ann6es, regut vite son cong6 et son 6tat demeure bon.

Etant donn6 les risques propres ~t la manipulation du Coccidioides immitis, les auteurs recommandent fortement que le personnel des laboratoires, surtout hors des r6gions end6miques, soit avis6 des possibilit6s d'exposition du malade/t ce champignon.


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