scholarly journals ANTIBACTERIAL ACTIVITY OF HERBAL EXTRACTS AGAINST Vibrio parahaemolyticus CAUSING ACUTE HEPATOPANCREATIC NECROSIS DISEASE (AHPND) IN WHITELEG SHRIMP (Litopenaeus vannamei) IN VITRO

2020 ◽  
Vol 1 (38) ◽  
pp. 82-88
Author(s):  
Nguyen Thi Nguyen ◽  
Nhi Thi Hong Nguyen
Keyword(s):  
Antibacterial Activity ◽  
Litopenaeus Vannamei ◽  
Vibrio Parahaemolyticus ◽  
Leaf Extract ◽  
Herbal Extracts ◽  
Physalis Angulata ◽  
Whiteleg Shrimp ◽  
Acute Hepatopancreatic Necrosis Disease ◽  
Muntingia Calabura

The antibacterial activity of herbal extracts to Vibrio parahaemolyticus causing acute hepatopancreatic necrosis disease in whiteleg shrimp (Litopenaeus vannamei) was studied and carried out in the School of Agriculture and Aquaculture, Tra Vinh University. The results showed that the inhibition zone of Muntingia calaburaleaf extract with ethanol 70% was 18.00 ± 0.00mm, Muntingia calabura leaf extract with ethanol 90% was 17.33 ± 0.58 mm and Muntingia calabura fresh leaf extract was 13.00 ± 0.00 mm. Minimum inhibitory concentration (MIC) of Muntingia calabura leaf extract with ethanol 70% and 90% were 5.120 mg/L, 10.240 mg/L. MIC value of Al lium cepa extract with ethanol 70% and 90% were 40.960 mg/L, Physalis angulata extract with ethanol 70% and 90% were 81.920 mg/L. The results showed that the antimicrobial activity was highest in the Muntingiacalabura leaf extract and lowest in Physalis angulata extract.

scholarly journals Draft Genome Sequence of Bowmanella denitrificans JL63, a Bacterium Isolated from Whiteleg Shrimp ( Litopenaeus vannamei ) That Can Inhibit the Growth of Vibrio parahaemolyticus

2018 ◽  
Vol 6 (14) ◽  
Author(s):  
Jason P. LaPorte ◽  
Edward J. Spinard ◽  
Marta Gomez-Chiarri ◽  
David C. Rowley ◽  
John J. Mekalanos ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Genome Sequence ◽  
Litopenaeus Vannamei ◽  
Vibrio Parahaemolyticus ◽  
Draft Genome ◽  
Draft Genome Sequence ◽  
Content Type ◽  
Whiteleg Shrimp ◽  
Acute Hepatopancreatic Necrosis Disease

ABSTRACT Bowmanella denitrificans strain JL63 was isolated from a whiteleg shrimp ( Litopenaeus vannamei ) and was determined to have antibacterial activity against an acute hepatopancreatic necrosis disease (AHPND) strain of Vibrio parahaemolyticus . Here, we report the draft genome sequence of this strain and identify genes that are potentially involved in its antibacterial activity.

scholarly journals Phycoerythrin from Colaconema sp. Has Immunostimulatory Effects on the Whiteleg Shrimp Litopenaeus vannamei and Increases Resistance to Vibrio parahaemolyticus and White Spot Syndrome Virus

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2371
Author(s):  
Po-Tsang Lee ◽  
Jing Huang ◽  
Chin-Yi Huang ◽  
Zi-Xuan Liu ◽  
Han-Yang Yeh ◽  
...  
Keyword(s):  
Litopenaeus Vannamei ◽  
Vibrio Parahaemolyticus ◽  
White Spot Syndrome Virus ◽  
Expression Profiles ◽  
White Spot ◽  
Shrimp Culture ◽  
White Spot Syndrome ◽  
Whiteleg Shrimp

We investigated whether phycoerythrin (PE), a pigment sourced from marine algae, could act as an immunomodulatory agent in whiteleg shrimp (Litopenaeus vannamei). To this end, PE was extracted and purified from a PE-rich macroalgae, Colaconema sp. Our in vitro analysis demonstrated that PE enhanced prophenoloxidase and phagocytosis activity but inhibited the production of reactive oxygen species in hemocytes. Additionally, the PE signal could be detected using an in vivo imaging system after its injection into the ventral sinus of the cephalothorax of whiteleg shrimp. The expression profiles of fourteen immune-related genes were monitored in hemocytes from whiteleg shrimp injected with 0.30 μg of PE per gram of body weight, and crustin, lysozyme, penaiedin 4, and anti-lipopolysaccharide factor showed up-regulated post-stimulation. The induction of immune genes and enhancement of innate immune parameters by PE may explain the higher survival rates for shrimp that received different doses of PE prior to being challenged with Vibrio parahaemolyticus or white spot syndrome virus compared to controls. Combined, these results show that PE from Colaconema sp. can differentially stimulate the immune response of whiteleg shrimp in vitro and in vivo and could potentially be used as an immunomodulator in shrimp culture.

scholarly journals In vitro Study on Anti-salmonella Activities of Boerhaavia diffusa (L. syn) Leaf Extract

2019 ◽  
pp. 1-10
Author(s):  
Ologun, Oluwabusayo ◽  
Dada, Ebenezer Oluyemi ◽  
Ajayi, Kehinde Oluyemi
Keyword(s):  
Antibacterial Activity ◽  
Clinical Isolate ◽  
Optical Density ◽  
Aqueous Extract ◽  
Leaf Extract ◽  
Ethanol Extract ◽  
Salmonella Typhi ◽  
Boerhaavia Diffusa ◽  
Broth Dilution

Various strategies have been employed in the treatment and management of Salmonella infection however, Salmonella strains have gained resistance to antibiotics. This study was to determine in vitro anti-Salmonella activity of Boerhaavia diffusa leaf extract against clinical isolate of Salmonella typhi and Salmonella typhi ATCC 14028. The aqueous and ethanol extracts of B. diffusa were studied for their antibacterial activity against pathogenic Salmonella typhi. This study was carried out between April and September 2018. The in vitro antibacterial activity was performed by agar well diffusion method and broth dilution using spectrophotometric method and the results were expressed as the average diameter of zone of inhibition of bacterial growth around the well and optical density respectively. It was observed that aqueous extract exerted slightly higher activity than ethanolic extract as revealed by the mean diameter of zone of inhibitions at a concentration of 200 mg/ml, the aqueous extract had 35.21±0.47 mm (Salmonella typhi ATCC 14028) compared with ethanol extract 26.41±0.32 mm (clinical). However, in the broth dilution method, ethanol extract significantly (p=0.05) reduced the cell, at 48 hours, the optical density of clinical isolate of S. typhi treated at concentration of 200 mg/ml of extract was 0.47±0.02 nm while at the same concentration of extract, aqueous extract had an optical density of 0.52±0.11 nm respectively. The phytochemical assay revealed that tannin (5.18±0.02 mg/g) and quinone (8.45±0.13 mg/g) in ethanol extract was significantly (p=0.05) higher than aqueous extract while saponin (14.18±0.06 mg/g) was higher in the aqueous extract. The ethanol and aqueous extracts of leaves of B. diffusa whole plant exhibited significant antibacterial activity against both clinical and typed Salmonella typhi. Therefore, the plant extract could be used for the treatment of Salmonellosis, however, the in vivo studies is needed to ascertain the safety of the extract.

scholarly journals Evaluation and Comparison of Antibacterial Efficacy of Herbal Extracts in Combination with Antibiotics on Periodontal pathobionts: An in vitro Microbiological Study

Antibiotics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 89 ◽  
Author(s):  
Shahabe Abullais Saquib ◽  
Nabeeh Abdullah AlQahtani ◽  
Irfan Ahmad ◽  
Mohammed Abdul Kader ◽  
Sami Saeed Al Shahrani ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Plant Extracts ◽  
Pathogenic Bacteria ◽  
Bacterial Resistance ◽  
Antimicrobial Agents ◽  
Synergistic Activity ◽  
Antibacterial Efficacy ◽  
Herbal Extracts ◽  
Inhibition Zones

Background: In the past few decades focus of research has been toward herbal medicines because of growing bacterial resistance and side effects of antimicrobial agents. The extract derived from the plants may increase the efficacy of antibiotics when used in combination against pathogenic bacteria. In the current study, the synergistic antibacterial efficacy of plant extracts in combination with antibiotics has been assessed on selected periodontal pathogens. Methods: Ethanolic extracts were prepared from Salvadora persica (Miswak) and Cinnamomum zeylanicum (Ceylon cinnamon), by the soxhalate method. Plaque samples were collected from clinical periodontitis patients to isolate and grow the periodontal pathobionts under favorable conditions. Susceptibility of bacteria to the extracts was assessed by gauging the diameter of the inhibition zones. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of plant extracts were determined against each bacterium. Synergistic activity of plants extract in combination with antibiotics against the bacteria was also assessed by measuring the diameter of the inhibition zones. Results: Ethanolic extract of both the plants showed an inhibitory effect on the proliferation and growth of all four strains of periodontal pathobionts. Maximum antibacterial activity was exhibited by C. zeylanicum against Tannerella forsythia (MIC = 1.56 ± 0.24 mg/mL, MBC = 6.25 ± 0.68 mg/mL), whereas among all the studied groups the minimum activity was reported by C. zeylanicum against Aggregatibacter actinomycetemcomitans the (MIC = 12.5 ± 3.25 mg/mL, MBC = 75 ± 8.23 mg/mL). Combination of herbal extracts with different antibiotics revealed a synergistic antibacterial effect. The best synergism was exhibited by S. persica with metronidazole against A. actinomycetemcomitans (27 ± 1.78). Conclusions: Current in vitro study showed variable antibacterial activity by experimented herbal extracts against periodontal pathobionts. The synergistic test showed significant antibacterial activity when plant extracts were combined with antibiotics.

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