Streptococcus iniae: A Growing Threat and Causative Agent of Disease Outbreak in Farmed Chinese Sturgeon (Acipenser sinensis)

Muhammad, Murtala; Zhang, Ting; Gong, Siyu; Bai, Jing; Ju, Jiansong; Zhao, Bo; Liu, Dong

doi:10.17582/journal.pjz/20190209200236

Cited by 11 publications

(16 citation statements)

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“…It is likely that White Sturgeon are relatively resistant to S. iniae through IC injection, and future studies investigating the pathogenesis of piscine streptococcosis in sturgeon are warranted. Muhammad et al (2020) challenged farmed Chinese Sturgeon A. sinensis by intraperitoneal injection with S. iniae. Injection of 2.0 × 10 5 , 2.0 × 10 6 , and 2.0 × 10 7 CFU/fish resulted in cumulative mortality of 40, 80, and 100%, respectively (Muhammad et al 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Muhammad et al (2020) challenged farmed Chinese Sturgeon A. sinensis by intraperitoneal injection with S. iniae. Injection of 2.0 × 10 5 , 2.0 × 10 6 , and 2.0 × 10 7 CFU/fish resulted in cumulative mortality of 40, 80, and 100%, respectively (Muhammad et al 2020). Soto et al (2016) investigated IC, IM, immersion, and oral challenge models using serial dilutions of S. agalactiae in Nile Tilapia.…”

Section: Discussionmentioning

confidence: 99%

“…(Deng et al 2017;Soto et al 2017;Pierezan et al 2020). It can cause high mortality, reaching 50-75% of cultured fish, resulting in significant economic losses for aquaculture industries worldwide (Agnew and Barnes 2007;Muhammad et al 2020). Streptococcus iniae infections are typically associated with septicaemia, meningitis, and necrotizing and heterophilic myositis (Agnew and Barnes 2007).…”

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Intracoelomic‐ and Intramuscular‐Injection Challenge Model of Piscine Streptococcosis in White Sturgeon Fingerlings

2020

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Streptococcus iniae is a zoonotic pathogen and one of the major aetiologic agents of streptococcosis. In White Sturgeon Acipenser transmontanus, S. iniae infection typically presents as a necrotizing and heterophilic myositis, causing 30–50% mortality in infected fish. To gain a better understanding of the pathogenesis of streptococcosis in White Sturgeon, and to identify the experimental route of infection that most closely mimics the natural disease, fingerlings were challenged with a single dose of 1.3 × 108 cells/fish of S. iniae that was administered via intracoelomic/intraperitoneal (IC) or intramuscular (IM) routes. Acute mortalities were present only in the IM‐challenged fish, with first mortality occurring 4 d postchallenge and the mortality rate reaching 18.3% after 9 d. The challenged fish presented erratic swimming, ulcerative skin lesions, and hemorrhages in the liver and swim bladder. Streptococcus iniae was recovered from the kidney and brain tissues of moribund and dead fish. Histopathologic analysis of fish that died acutely revealed massive proliferation of bacteria in the muscle at the injection site and within vascular organs such as the heart and spleen, with variable amounts of tissue necrosis including a necrotizing myositis. Fish that died closer to 9 d postchallenge demonstrated more pronounced multifocal to locally extensive granulomatous inflammation of skeletal muscle at the injection site, liver, kidney, and spleen. No mortality, clinical signs, or gross changes were observed in the control or IC‐challenged fish. Postmortem evaluation of 10 survivors in each treatment was performed to determine carrier status in the brain and posterior kidney tissues. The prevalence of S. iniae in survivors was 10% and 0% in the IM‐ and IC‐challenged groups, respectively. The results from this study suggest that IM‐injection challenge methods are suitable for inducing streptococcosis in White Sturgeon, and they may be the preferred method for studying the pathogenesis of the naturally occurring disease in this species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Intracoelomic‐ and Intramuscular‐Injection Challenge Model of Piscine Streptococcosis in White Sturgeon Fingerlings

2020

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“…In some recent studies, the pathogenicity of this bacterium in Siberian sturgeon (Deng et al, 2017;Chen et al, 2020), Chinese sturgeon (Muhammad et al, 2020) and white sturgeon (Soto et al, 2017) has been reported too. LC50 value of this bacterium in Siberian sturgeon were 5.1 × 10 5 to 6.4 × 10 5 cfu per fish (Chen et al, 2020) and in Chinese sturgeon was 1.6 × 10 6 cells fish -1 (Muhammad et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Under such cultural conditions, thus, the chance of some disease outbreaks including streptococcosis can be dramatically increased. Although there are some reports related to sturgeons infection with Streptococcus spp, such as Streptococcus dysgalactiae in Acipenser schrenckii (Yang & Li 2009) or Streptococcus iniae in Siberian sturgeon, Acipenser baerii (Deng et al, 2017;Chen et al, 2020), Chinese sturgeon, Acipenser sinensis (Muhammad et al, 2020) and white sturgeon, Acipenser transmontanus, (Soto et al, 2017), There is no report of the susceptibility of Persian sturgeon to streptococcosis caused by S. iniae. Thus, the aim of the present study was to evaluate pathogenicity of S. iniae and its histopathological signs in juvenile Persian sturgeon.…”

Section: Introductionmentioning

confidence: 99%

Research Article: Histopathological features of infection by Streptococcus iniae in Persian sturgeon, Acipenser persicus

Sharirfpour

Soltani

Mazandarani

2020

I. j. Aqua. Anim. Health

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Salvia miltiorrhiza polysaccharides enhance the antioxidant capacity and immune resistance of hybrid sturgeon (Acipenser baerii♀ × Acipenser schrenckii♂) against Streptococcus iniae infection

et al. 2023

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Streptococcus iniae: A Growing Threat and Causative Agent of Disease Outbreak in Farmed Chinese Sturgeon (Acipenser sinensis)

Cited by 11 publications

References 10 publications

Intracoelomic‐ and Intramuscular‐Injection Challenge Model of Piscine Streptococcosis in White Sturgeon Fingerlings

Intracoelomic‐ and Intramuscular‐Injection Challenge Model of Piscine Streptococcosis in White Sturgeon Fingerlings

Research Article: Histopathological features of infection by Streptococcus iniae in Persian sturgeon, Acipenser persicus

Salvia miltiorrhiza polysaccharides enhance the antioxidant capacity and immune resistance of hybrid sturgeon (Acipenser baerii♀ × Acipenser schrenckii♂) against Streptococcus iniae infection

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