Massive Mortality Associated with Streptococcus agalactiae Infection 
 in Cage-cultured Red Hybrid Tilapia Oreochromis niloticus in Como River, Kenyir Lake, 
 Malaysia

Musa, Najiah; Aqilah, N.I.; Lee, K.L.; Khairulbariyyah, Z.; Mithun, S.; Chowdhury, Ahmed Jalal Khan; Shaharom-Harrison, Faizah; Musa, Nadirah

doi:10.3923/jbs.2012.438.442

Cited by 36 publications

(29 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…S. iniae and S. agalactiae have been frequently reported as the causative agents of streptococcosis in tilapia worldwide (Perera et al 1994; Eldar et al 1995; Bowser et al 1998; Salvador et al 2005; Suanyuk et al 2005, 2010; Yuasa et al 2008; Hernandez et al 2009; Musa et al 2009; Abuseliana et al 2010; Lusiastuti et al 2012; Najiah et al 2012; Figueiredo et al 2012). Except for one report from Brazil (Evans et al 2009), L. garvieae has been rarely isolated in tilapia with streptococcosis.…”

Section: Introductionmentioning

confidence: 99%

Isolation and molecular identification of the etiological agents of streptococcosis in Nile tilapia (Oreochromis niloticus) cultured in net cages in Lake Sentani, Papua, Indonesia

et al. 2014

View full text Add to dashboard Cite

Infections with Streptococcus spp. were observed in Nile tilapia cultured in net cages in Lake Sentani, Papua, Indonesia. Clinical signs included exophthalmia, erratic swimming, ascites in abdominal cavity, and external hemorrhages. Four types of bacterial colonies (SK, K10, P20, and M12) were isolated from the brain, kidney, and eyes. Based on phenotypic and genetic (16S rDNA sequencing) characteristics, the isolates were identified as Streptococcus iniae (SK), Streptococcus agalactiae (K10 and P20) and Lactococcus garvieae (M12). The latter species has not been previously isolated or reported from fish streptococcosis in Indonesia. Intraperitoneal injection of healthy tilapia with the bacterial species caused significant morbidity (70%) within 3 days and 100% mortality at 6 days post injection. Experimental infections and reisolation of the bacteria from morbid and dead fish suggest they are the causative agents of streptococcosis, which rendered high mortality among cage cultured Nile tilapia in Lake Sentani. Our results suggest the need for developing diagnostic tools for accurate identification of the agents of streptococcosis. As tilapia aquaculture continues to expand as a means of food production and livelihood in Indonesia, it becomes crucial to ensure that fish resources are monitored and protected from the adverse effects of infectious diseases.

show abstract

Section: Introductionmentioning

confidence: 99%

Isolation and molecular identification of the etiological agents of streptococcosis in Nile tilapia (Oreochromis niloticus) cultured in net cages in Lake Sentani, Papua, Indonesia

et al. 2014

View full text Add to dashboard Cite

show abstract

“…S. agalactiae pathogen attacks are acute in tilapia (Hernandez et al, 2009). The outbreaks of S. agalactiae infection were first noticed in Malaysian (Nijah et al 2012), Asian and Pacific Asian waters. In 2008, streptococcosis was reported to cause tremendous economic losses, which reached approximately $250 million (Klesius et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Multispecies probiotics applications through feed addition on cultured tilapia to prevent streptococcosis

Destianingrum¹,

Yuhana²,

Lusiastuti³

2017

Jurnal Akuakultur Indonesia

View full text Add to dashboard Cite

Streptococcosis is one of the diseases that often arise and can cause death by 100% in tilapia fish farming. This study aimed to determine the most optimal probiotics combination of cells Bacillus cereus P22, Bacillus subtillis ND2 and Staphylococcus lentus L1k through the feed for streptococcosis prevention. The experimental fish with initial body weight of (13.06±0.18 g), were randomly distributed at 25 fish per 60 L water, and reared for 21 days. The fish fed with supplemented feed (except controls) with FR 3%, about three times a day, for 14 days.

show abstract

“…Early reports suggest that since the 1990s, bacterial diseases, particularly streptococcal infections (strep-tococcosis) have appeared as major problems in tilapia farming worldwide and resulted in an estimated annual loss of 150 million USD (Shoemaker and Klesius, 1997;Shoemaker et al, 2000). Massive mortalities of tilapia associated with streptococcosis have also been reported in recent years (Neely et al, 2002;Najiah et al, 2012). Streptococcal infections in fish are an additional concern due to reports of zoonotic infections caused by Streptococcus (Weinstein et al, 1997;Bowser et al, 1998;Neely et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Biological control of streptococcal infection in Nile tilapia Oreochromis niloticus (Linnaeus, 1758) using filter-feeding bivalve mussel Pilsbryoconcha exilis (Lea, 1838)

et al. 2015

View full text Add to dashboard Cite

Since bivalve mussels are able to graze heavily on bacteria, in this paper it is hypothesized that when mussels are cultured with fish, the filtering efficiency of the mussels will keep the bacterial population below a certain threshold and thus assist in reducing the risk of bacterial disease outbreaks. The ability of the filter-feeding bivalve mussel Pilsbryoconcha exilis to control Streptococcus agalactiae was tested in a laboratory-scale tilapia culture system. Juvenile Nile tilapia (Oreochromis niloticus), the bivalve mussel as well as the bacteria were cultured at different combinations using four treatments: treatment-1: mussel and bacteria but no fish, treatment-2: tilapia and mussel but no bacteria, treatment-3: tilapia and bacteria but no mussel, and treatment-4: tilapia, mussels, and bacteria. All treatments were run in three replicates; stocking rates were 10 tilapia juveniles; five mussels; and about 3.5 9 10 5 colony forming units (CFU) ml À1 of bacteria in 50-L aquaria with 40-L volume. The mussel reduced the bacterial population by 83.6-87.1% in a 3-week period whereas in the absence of the mussel, the bacterial counts increased by 31.5%. Oresence of the mussel also resulted in significantly higher growth and lower mortality of tilapia juveniles than when the mussel was absent. The results of this experiment suggest that the freshwater mussel P. exilis could control the population of S. agalactiae in a laboratory-scale tilapia culture system. Future studies should focus on the dynamic interactions among fish, mussels, and bacteria as well as on how input such as feed and other organic materials affect these interactions.

show abstract

Massive Mortality Associated with Streptococcus agalactiae Infection in Cage-cultured Red Hybrid Tilapia Oreochromis niloticus in Como River, Kenyir Lake, Malaysia

Cited by 36 publications

References 10 publications

Isolation and molecular identification of the etiological agents of streptococcosis in Nile tilapia (Oreochromis niloticus) cultured in net cages in Lake Sentani, Papua, Indonesia

Isolation and molecular identification of the etiological agents of streptococcosis in Nile tilapia (Oreochromis niloticus) cultured in net cages in Lake Sentani, Papua, Indonesia

Multispecies probiotics applications through feed addition on cultured tilapia to prevent streptococcosis

Biological control of streptococcal infection in Nile tilapia Oreochromis niloticus (Linnaeus, 1758) using filter-feeding bivalve mussel Pilsbryoconcha exilis (Lea, 1838)

Contact Info

Product

Resources

About