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Volume 17, Number 9—September 2011


Tubulinosema sp. Microsporidian Myositis in Immunosuppressed Patient

Maria M. ChoudharyComments to Author , Maureen G. Metcalfe, Kathryn Arrambide, Caryn Bern, Govinda S. Visvesvara, Norman J. Pieniazek, Rebecca D. Bandea, Marlene DeLeon-Carnes, Patricia Adem, Moaz M. Choudhary, Sherif R. Zaki, and Musab U. Saeed
Author affiliations: Author affiliations: Cleveland Clinic Foundation, Cleveland, Ohio, USA (Maria M. Choudhary); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (M.G. Metcalfe, C. Bern, G.S. Visvesvara, N.J. Pieniazek, R.D. Bandea, M. DeLeon-Carnes, P. Adem, S.R. Zaki); Southern Illinois University, Quincy, Illinois, USA (K. Arrambide, Moaz M. Choudhary, M.U. Saeed)

Main Article


Comparison of various Tubulinosema spp. with organism isolated from a 67-year old woman in 2009*

Characteristics Tu. ratisbonensis Tu. kingi Tu. acridophagus 2009 isolate
First described 2005 1962 1967 NA
Previously named NA Nosema kingi Visvesvaria acridophagus, Nosema acridophagus NA
Host in which identified Drosophila melanogaster
fruit fly (Diptera) D. willistoni
fruit fly Schistocerca Americana grasshopper (Orthoptera) Human
(skeletal muscle)
Known human infections None None None None
Microtubules on plasma lemma Present Present Present Not seen
Spore shape Pear shaped Oval Oval Round-to-pear shaped
Meronts nuclei 1, 2, or 4 1, 2, or 4 1, 2, or 4 Meronts not seen
Sporonts nuclei 2–4 2–4 2–4 Sporonts not seen
Polar tube 9–14 13 10–12 11
Coils/rows Single Single/
double (anterior) Single Single
Polar filament arrangement Anisofilar Isofilar Isofilar Anisofilar

*NA, not applicable.

Main Article