Bipolaris australiensis Species

Colonies on potato dextrose agar at 25°C are initially white, soon becoming gray to black with a black reverse. Rapid growth. Texture is woolly to cottony.

Hyphae are septate and dark. Conidiophores may be up to 150 µm in length, are sympodial, geniculate, simple or branched, bearing conidia through pores or openings (poroconidia). Conidia have 2 to 5 transverse distosepta or pseudosepta (septa that do not extend to the cell wall with cells inclosed within sacs) and 3 to 6 cells. They measure approximately 14-40 x 6-11 µm. A flattened hilum or point of attachment is seen on the basal cell. Conidia germinate from both poles (bipolar).

One of several "graminicolous" species common on plant material, particularly grasses. This species displays considerable variability in the dimension of the conidia, a feature generally not seen with B. spicifera or B. hawaiiensis. It has been isolated from a lesion of viral vesicular dermatitis on the scalp [411], reported as an agent of allergic chronic sinusitis [555], and as the cause of a disseminated infection in a young immunocompetent man [744].

AMB	ITRA
0.5 µg/ml=1	0.03 µg/ml=1

Drug/N	AMB/1	ITRA/1
MIC Range	0.5	0.03

* Fungus Testing Laboratory unpublished data (CLSI M38-A)

PubMed

GenBank

Bipolaris australiensis

References

411. Chalet, M., D. H. Howard, M. R. McGinnis, and I. Zapatero. 1986. Isolation of Bipolaris australiensis from a lesion of viral vesicular dermatitis on the scalp. J. Med. Vet. Mycol. 24:461-5.

555. del Palacio, A., M. Perez-Simon, A. Arribi, A. Valle, S. Perea, and A. Rodriguez-Noriega. 1997. Bipolaris australiensis in a Spanish patient with allergic chronic sinusitis. Rev Iberoam Micol. 14:191-3.

744. Flanagan, K. L., and A. D. Bryceson. 1997. Disseminated infection due to Bipolaris australiensis in a young immunocompetent man: case report and review. Clin Infect Dis. 25:311-3.