Spiroplasma penaei Nunan et al. 2005 Nunan L.M. Lightner D.V. Oduori M.A. Gasparich G.E. Spiroplasma penaei sp. nov., associated with mortalities in Penaeus vannamei, Pacific white shrimp. 2005 55 6 2317 2322 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.63555-0 16280489