Characterization of two pathogenic Photobacterium strains isolated from Exopalaemon carinicauda causing mortality of shrimp

A novel research on isolation and characterization of Photobacterium damselae subsp. damselae from Pacific white shrimp, Penaeus vannamei, displaying black gill disease cultured in China

“…damselae in cultured and black gill diseased P. vannamei and its pathogenicity (LD 50 value: 9.75 ± 4.29 × 105 CFU/g [body weight]) was confirmed by reverse gavage assay. The mortality of shrimp increased along with the increase of bacterial infection dosage in the present study, which is consistent with previous studies (Cheng et al, 1993; Liu et al, 2016).…”

“…By contrast, fewer attentions are paid to its pathogenicity in shrimp. To date, its pathogenicity is conformed only in P. monodon (LD 50 value: 2.5 × 10 5 CFU/g (body weight)) and E. carinicauda (LD 50 value: 1.09–2.30 × 10 5 CFU/g (body weight)) via intramuscular injection, which associates with three previous studies (Cheng et al, 1993; Vaseeharan et al, 2007; Liu et al, 2016). In the present study, we reported Photobacterium damselae subsp.…”

“…Similar pathological changes are also observed in the hepatopancreas of P. monodon and E. carinicauda , and in kidney of Cynoglossus semilaevis infected by Photobacterium damselae subsp. damselae (Cheng et al, 1993; Liu et al, 2016; Shao et al, 2019). The histopathology caused by Photobacterium damselae subsp.…”

“…Additionally, Photobacterium damselae ssp. damselae are also pathogenic to few shrimp species, including P. monodon and Exopalaemon carinicauda (Cheng, Song, Cheng, & Wang, 1993; Vaseeharan et al, 2007; Liu, Liu, & Li, 2016).…”

Bacterial population in intestines of white shrimp, Litopenaeus vannamei fed a synbiotic containing Lactobacillus plantarum and galactooligosaccharide

“…In fact, the prebiotic GOS supported both the selected probiotic and other groups of bacteria but not endemic pathogenic bacteria, such as Photobacterium or Vibrio , in this study. Both Photobacterium and Vibrio were predominant during the postlarval stage (80%) and during the juvenile stages (89.1%~94.2%) (Huang et al, ) and can cause serious mortality in shrimp (Ananda et al, ; Liu, Cheng, Hsu, & Chen, ; Liu, Liu, & Li, ). In this study, Photobacterium was dominant at 54.4% and 26.7% in control and SYN‐fed shrimp, respectively, whereas Vibrio species were at 16.7% and 8.5% for control and SYN‐fed shrimp, respectively.…”