International Journal of Aquaculture, 2026, Vol.16, No.3, 184-195 http://www.aquapublisher.com/index.php/ija 191 Table 6 Morphological and biochemical characteristics of isolates of experimental pond water Weeks Isolate code Cell shape Gram reaction Catalase TSI reaction Urease Motility test H2S test Citrate reaction Methyl red Hemolnysis Glucose Mannitol Oxidase reaction Possible organisms 4 Dctr SR - + - - + - + - Β - + + presumptive Plesiomonas shigelloides Dctr SR - + - - + - + - Β + + + presumptive Plesiomonas shigelloides DTii SR - - - - - - - - Β + + + presumptive Plesiomonas shigelloides DTii SR - + - - + - + - Β - + + presumptive Plesiomonas shigelloides DTiii SR - + - - + - + - Β - + + presumptive Plesiomonas shigelloides Dtiv SR - + - - + - + - Β - + + presumptive Plesiomonas shigelloides DTv SR - + - - + - + - Β + + + presumptive Plesiomonas shigelloides Dtvi SR - + - - + - + - Β + + + presumptive Plesiomonas shigelloides Dtvi SR - - - - - - - - Β + + + presumptive Plesiomonas shigelloides 8 Ectr SR - + - - + - + - Β + + + presumptive Plesiomonas shigelloides Etii SR - + - - + - + - Β + + + presumptive Plesiomonas shigelloides Etiii SR - + - - + - + - Β + + + presumptive Plesiomonas shigelloides Etiv SR - + - - + - + - Β + + + presumptive Plesiomonas shigelloides Etv SR - + - - + - + - Β - + + presumptive Plesiomonas shigelloides ETvi SR - + - - - - + - Β + + + presumptive Plesiomonas shigelloides D-, water sample at week 4; E, water sample at week 8; Ctr, experimental pond 1, Tii, experimental pond 2; Tiii, experimental pond 3; Tiv, experimental pond 4; Tv, experimental pond 5; Tvi, experimental pond 6; SR, Short rod; +, Positive; β, Beta; -. Negative
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