Modification of an agar well diffusion technique to isolate yeasts that inhibit Vibrio parahaemolyticus , the causative agent of acute hepatopancreatic necrosis disease

2018 ◽  
Vol 49 (12) ◽  
pp. 3838-3844
Author(s):  
Chakhriya Chalad ◽  
Jetnapang Kongrueng ◽  
Kitiya Vongkamjan ◽  
William P. Robins ◽  
Varaporn Vuddhakul ◽  
...  
Keyword(s):  
Causative Agent ◽  
Vibrio Parahaemolyticus ◽  
Diffusion Technique ◽  
Acute Hepatopancreatic Necrosis Disease

scholarly journals Isolation and characterization of infectious Vibrio parahaemolyticus, the causative agent of AHPND, from the whiteleg shrimp (Litopenaeus vannamei)

2017 ◽  
Vol 44 (3) ◽  
pp. 470-479
Author(s):  
Patricia López-León ◽  
Antonio Luna-González ◽  
Ruth Escamilla-Montes ◽  
María del Carmen Flores-Miranda ◽  
Jesús A. Fierro-Coronado ◽  
...  
Keyword(s):  
Causative Agent ◽  
Biofilm Formation ◽  
Vibrio Parahaemolyticus ◽  
Bacterial Strains ◽  
Isolation And Characterization ◽  
Commercial Farms ◽  
Whiteleg Shrimp ◽  
Acute Hepatopancreatic Necrosis Disease ◽  
Selection Of

Vibrio parahaemolyticus, the causative agent of acute hepatopancreatic necrosis disease (AHPND), was isolated from the hepatopancreas of moribund whiteleg shrimp of commercial farms from Guasave, Sinaloa, Mexico. The isolates were screened on thiosulfate citrate bile salt sucrose agar plates for the selection of green colonies and further characterized through PCR with AP3 primers, 89F/R primers, hemolysin genes, hemolytic and enzymatic activity, hydrophobicity, autoaggregation, and biofilm formation. Bioassays by immersion challenge were conducted to confirm the pathogenicity of selected bacterial strains. In addition, the LC50 was calculated for each isolate. All isolates (35) belonged to V. parahaemolyticus, but three isolates did not correspond to strains that cause AHPND since they were negative with 89F/R primers. All isolates were αhemolytic and showed biofilm formation (from moderate to strong). Isolates were hydrophobic or hydrophilic and showed high autoaggregation capacity. Eight strains did not kill shrimp and eleven were pathogenic, but differences in virulence were found among them perhaps due to α-hemolysis and differences in biofilm formation and hydrophobicity. Therefore, performed characterization may help to understand the pathogenicity of V. parahaemolyticus. Finally, results showed that smaller shrimp are less resistant to V. parahaemolyticus infection.

scholarly journals Effects of Feed Mixed with Lactic Acid Bacteria and Carbon, Nitrogen, Phosphorus Supplied to the Water on the Growth and Survival Rate of White Leg Shrimp (Penaeus vannamei) Infected with Acute Hepatopancreatic Necrosis Disease Caused by Vibrio parahaemolyticus

Biology ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 280
Author(s):  
Linh Nguyen Thi Truc ◽  
Tuu Nguyen Thanh ◽  
To Tran Thi Hong ◽  
Day Pham Van ◽  
Minh Vo Thi Tuyet ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Survival Rate ◽  
Lactic Acid Bacteria ◽  
Vibrio Parahaemolyticus ◽  
Control Group ◽  
Penaeus Vannamei ◽  
Growth And Survival ◽  
Acute Hepatopancreatic Necrosis Disease ◽  
Nitrogen Phosphorus ◽  
Shrimp Health

This study aimed to evaluate the growth, survival rate, and resistance to acute hepatopancreatic necrosis disease (AHPND) of white leg shrimp (Penaeus vannamei) by using Lactobacillus plantarum, Lactobacillus fermentum, and Pediococcus pentosaceus mixed with feed, and at the same time supplying CNP in a ratio of 15:1:0.1 to the water. As a result, the treatments that shrimp were fed with feed containing lactic acid bacteria (LAB), especially L. plantarum, have increased shrimp growth, total hemocyte cells, granulocyte cells, and hyaline cells significantly (p < 0.05) in comparison to the control group. The supply of CNP to the water has promoted the intensity of V. parahaemolyticus effects on shrimp health and significantly decreased total hemocyte cells, granulocyte cells, and hyaline cells by 30–50% in the period after three days of the challenge, except in L. plantarum treatment, which had only a 20% decrease compared to other treatments. In CNP supplying treatments, the AHPND infected rate and mortality of shrimp were higher than those in other treatments. In summary, the supply of CNP had significantly reduced the shrimp’s immune response and promoted the susceptibility of shrimp to AHPND in both cases of use with and without LAB-containing diets.

scholarly journals Draft Genome Sequence of the Shrimp Pathogen Vibrio parahaemolyticus ST17.P5-S1, Isolated in Peninsular Malaysia

2018 ◽  
Vol 7 (11) ◽  
Author(s):  
Sridevi Devadas ◽  
Subha Bhassu ◽  
Tze Chiew Christie Soo ◽  
Fatimah M. Yusoff ◽  
Mohamed Shariff
Keyword(s):  
Antibiotic Resistance ◽  
Resistance Genes ◽  
Vibrio Parahaemolyticus ◽  
East Coast ◽  
Draft Genome ◽  
Antibiotic Resistance Genes ◽  
Peninsular Malaysia ◽  
Penaeus Vannamei ◽  
Content Type ◽  
Acute Hepatopancreatic Necrosis Disease

We sequenced the genome of Vibrio parahaemolyticus strain ST17.P5-S1, isolated from Penaeus vannamei cultured in the east coast of Peninsular Malaysia. The strain contains several antibiotic resistance genes and a plasmid encoding the Photorhabdus insect-related (Pir) toxin-like genes, pirAvp and pirBvp, associated with acute hepatopancreatic necrosis disease (AHPND).

Variation in Vibrio parahaemolyticus isolates from a single Thai shrimp farm experiencing an outbreak of acute hepatopancreatic necrosis disease (AHPND)

Aquaculture ◽  
2014 ◽  
Vol 428-429 ◽  
pp. 297-302 ◽  
Author(s):  
Jyoti Joshi ◽  
Jiraporn Srisala ◽  
Viet Hong Truong ◽  
I-Tung Chen ◽  
Bunlung Nuangsaeng ◽  
...  
Keyword(s):  
Vibrio Parahaemolyticus ◽  
Shrimp Farm ◽  
Acute Hepatopancreatic Necrosis Disease

scholarly journals Passive Immunization with Recombinant Antibody VLRB-PirAvp/PirBvp—Enriched Feeds against Vibrio parahaemolyticus Infection in Litopenaeus vannamei Shrimp

Vaccines ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 55
Author(s):  
Jassy Mary S. Lazarte ◽  
Young Rim Kim ◽  
Jung Seok Lee ◽  
Jin Hong Chun ◽  
Si Won Kim ◽  
...  
Keyword(s):  
Vibrio Parahaemolyticus ◽  
Recombinant Antibody ◽  
Expression System ◽  
Passive Immunization ◽  
Control Group ◽  
Suitable Alternative ◽  
Shrimp Feed ◽  
A Cell ◽  
Acute Hepatopancreatic Necrosis Disease ◽  
Shrimp Farms

The causative agent of acute hepatopancreatic necrosis disease (AHPND) is the bacterium, Vibrio parahaemolyticus, which secretes toxins into the gastrointestinal tract of its host. Vibrio parahaemolyticus toxins A and B (PirAvp/PirBvp) have been implicated in the pathogenesis of this disease, and are, therefore, the focus of studies developing treatments for AHPND. We previously produced recombinant antibodies based on the hagfish variable lymphocyte receptor B (VLRB) capable of neutralizing some viruses, suggesting that this type of antibody may have a potential application for treatment of AHPND. Here, recombinant PirAvp/PirBvp, produced using a bacterial expression system, were used as antigens to screen a hagfish VLRB cDNA library to obtain PirAvp/PirBvp-specific antibodies. A cell line secreting these antibodies was established by screening and cloning the DNA extracted from hagfish B cells. Supernatants collected from cells secreting the PirAvp/PirBvp antibodies were collected and concentrated, and used to passively immunize shrimp to neutralize the toxins PirAvp or PirBvp associated with AHPND. Briefly, 10 μg of PirAvp and PirBvp antibodies, 7C12 and 9G10, respectively, were mixed with the shrimp feed, and fed to shrimp for three days consecutive days prior to experimentally infecting the shrimp with V. parahaemolyticus (containing toxins A and B), and resulting mortalities recorded for six days. Results showed significantly higher level of survival in shrimp fed with the PirBvp-9G10 antibody (60%) compared to the group fed the PirAvp-7C12 antibody (3%) and the control group (0%). This suggests that VLRB antibodies may be a suitable alternative to immunoglobulin-based antibodies, as passive immunization treatments for effective management of AHPND outbreaks within shrimp farms.

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