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Case Reports
. 2005 Mar;11(3):479-81.
doi: 10.3201/eid1103.040697.

Pythiosis in Africa

Christine Rivierre  1 , Caroline Laprie, Olivier Guiard-Marigny, Patrick Bergeaud, Madeleine Berthelemy, Jacques Guillot
Affiliations
Case Reports

Pythiosis in Africa

Christine Rivierre et al. Emerg Infect Dis. 2005 Mar.

Abstract

We report the first case of pythiosis from Africa in an 8-month-old dog with a chronic and ulcerative cutaneous lesion. The etiologic agent belonged to the genus Pythium. Phylogenetic analysis placed the isolate in a sister group to the other P. insidiosum strains. However, the isolate may belong to a new Pythium species.

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Figures

Figure 1
Figure 1
Unique cutaneous lesion on the right side of the hip in an 8 month-old German Shepherd. The lesion had appeared 4 months before this image was taken and had rapidly evolved into a large ulcer with draining tracts.
Figure 2
Figure 2
Presence of numerous, broad (3−9 μm in diameter), irregular, septate hyphae in a pyogranulomatous dermatitis (Gomori methenamine silver stain). Bar = 15 μm.
Figure 3
Figure 3
Evolutionary tree of 37 internal transcribed spacer (ITS) and 5.8S rRNA sequences from oomycetes. Each sequence is identified by a Genbank accession number. Shown are 23 sequences from Pythium insidiosum from America (□) and Asia/Australia (△). The phylogram presented resulted from bootstrapped data sets (3) using parsimony analysis (heuristic search option in PAUP 4.0). This tree was identical to the consensus of 17 most parsimonious trees generated from the branch and bound algorithm in PAUP 4.0. The percentages above the branches are the frequencies with which a given branch appeared in 1,000 bootstrap replications. Bootstrap values below 50% are not displayed. The evolutionary distance between two sequences is obtained by summing the lengths of the connecting branches along the horizontal axis, using the scale on the bottom. Lagenidium giganteum (AY151183), Saprolegnia parasitica (AY310504), and S. salmonis (AY647193) were chosen as outgroups.
See this image and copyright information in PMC

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