Jorge Lobo's disease: experimental inoculation in Swiss mice
Rev. Inst. Med. Trop. Säo Paulo
;
41(6): 359-364, Nov.-Dec. 1999.
Article
in English
| LILACS
| ID: lil-320654
ABSTRACT
Sixty-four isogenic Swiss mice were intradermically inoculated in both hind foot pads. The inocula, consisting of fungal suspensions from biopsies obtained from Jorge Lobo's Disease patients, had the total number of fungi and the viability index determined using a Neubauer chamber and the fluorescein diacetate-ethidium bromide technique (FD-EB), respectively. The animals were sacrificed at times ranging from ten days to eighteen months after inoculation. The cellular infiltrate, mainly consisting of macrophages containing fungi, increased progressively up to end of the study; however, no macroscopic alterations were observed in the inoculated feet. After nine months, small numbers of Langhans' giant cells started to appear in the infiltrate. A considerable number of fungi was observed at the end of the experimental period, but only a few were viable when stained by the FD-EB technique. This fact suggests that there is a multiplication of fungal cells, which are destroyed by the macrophages but remain in the tissue for a long time due perhaps to the difficulties in their elimination. These findings led us to conclude that in spite of the maintenance of the infection in these animals, Swiss mice cannot be considered an ideal model to study Jorge Lobo's Disease. However, the authors call attention to the possibility of other mouse strains being more susceptible to Paracoccidioides loboi.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Blastomycosis
/
Keloid
Type of study:
Prognostic study
Limits:
Animals
Language:
English
Journal:
Rev. Inst. Med. Trop. Säo Paulo
Journal subject:
Tropical Medicine
Year:
1999
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Instituto Lauro de Souza Lima/BR
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