A new tool in the battle against decapod iridescent virus (DIV-1)

04 THG04
28 view

A new tool in the battle against the decapod iridescent virus (DIV-1)

A new diagnostic tool that can detect a range of aquatic pathogens, including DIV-1, between two and four weeks before clinical signs are apparent to shrimp farmers, has recently been launched by Genics.

Genics' MultiPath technology is now being used in 23 countries and covers over 90 per cent of all Australian shrimp/prawn producers

Dr Melony Sellars, CEO of the Australian company, talks to The Fish Site about shrimp pathogens, founding a startup, and the wisdom of shrimp farmers.

Why is a decapod iridescent virus (DIV-1) such a major concern for shrimp farmers?

DIV-1 causes mass mortalities and has been reported now in the two major shrimp culture species – L. vannamei and P. monodon. It can affect late post-larvae, juvenile and sub-adult shrimp, mainly during low-temperature seasons. It is a robust DNA virus and has the potential to spread in uncooked commodities and frozen or fresh live feed ingredients for broodstock shrimp.

How does your device help to tackle this and other pathogens?

Shrimp MultiPath Xtra acts as an early warning system for farmers, alerting them that pathogens are present before they see clinical signs of disease. We can detect a pathogen two to four weeks before a farmer sees the first clinical signs of disease, meaning there is time for early risk mitigation strategies to be implemented. Risk mitigation can be as simple as not sharing nets with other ponds, increasing biosecurity around impacted ponds, letting neighbours know of the biosecurity risk, increasing aeration, reducing feed rate or planning early harvest. In the case of pathogens that cause high mortality like WSSV [whitespot] and DIV-1, MultiPath Xtra can be the difference between harvesting or not harvesting at all. In the case of IHHNV [infectious hypodermal and hematopoietic necrosis], MultiPath Xtra can boost production by up to USD $52K per hectare through only stocking low or no load IHHNV post-larvae.

Shrimp MultiPath Xtra can detect a range of pathogens, including DIV-1

How easy is it to use the system?

Genics offer Shrimp MultiPath Xtra as a service from our ISO17025 accredited service laboratories in Australia. Shipping shrimp samples to Australia in 70 per cent ethanol is a simple process and takes 3-4 days from most regions of the world. Once samples arrive in the lab we can provide data back within one business day. Genics provide a range of complementary educational videos on dissection and collection of tissue samples. Our expert team can also work with a farm to design customised health management plans.

What has industry uptake been like to date?

Genics are now servicing 23 countries with MultiPath technology, with many repeat and dedicated customers. In Australia Genics services over 90 per cent of the total market.

What other measures should farmers take to reduce the likelihood of contracting DIV-1?

Farmers should thoroughly evaluate all the biosecurity risks and pathogen entry points on their farm – including people, live, fresh or frozen broodstock feeds, intake water and broodstock. Farms should ideally have a health surveillance programme and a biosecurity plan in place. Health surveillance can be as simple as routine pathogen screening of a subset of animals from each crop and can be highly cost-effective, and deliver empowering farm management data.

What should farmers do if DIV-1 is detected in their sites?

Detection should be reported to the relevant authorities immediately, which will vary from country to country. From here the farm biosecurity plan should be implemented and followed.

What makes shrimp more susceptible to the disease?

Healthy shrimp are less susceptible to disease. Good pond environment, water quality, high-quality feed and good shrimp genetics all play a critical role.

Dr Melony Sellars established Genics while working at CSIRO in 2017

What do you think are the biggest biosecurity challenges facing shrimp farmers?

There are several key challenges. The lack of sufficient quantities of pathogen-free live and fresh frozen feeds for broodstock maturation or a lack of a suitable maturation diet that can be heat extruded to render pathogens inactive is a key challenge. Access to high health domesticated broodstock to all shrimp farming regions can also at times be prohibitive either by cost or due to geographical and political challenges.

What inspired you to start up your own company?

I worked at CSIRO for nearly 20 years, developing novel biotech solutions for the national and international shrimp industry. One of those tools evolved into what is now known as Shrimp MultiPath. Back in 2017, I asked CSIRO if I could start a company and take the tech to market. After several business and accelerator programmes, here we are today, with Genics holding an IP licence from CSIRO for the tech, and I am taking it to market as a CEO. It’s a fantastic feeling and I am 100 per cent dedicated to transforming how we farm and manage shrimp under culture by better understanding the number one risk to production, pathogens and the diseases they cause.

When you develop technology as a scientist that can really disrupt and change an industry, it’s heart-breaking if it doesn’t make it from the research bench to a commercial product. Before the invention of MultiPath, I had already finalised several biotech products that were only available to industry through collaborative R&D. It was disappointing when I would receive enquiries from the industry all around the world to access the tech but I was never able to provide access. When we had moved beyond proof-of-concept and demonstrated that MultiPath could actually work, I knew the best way to make it available to the entire shrimp industry was to take it to market myself. That’s when I started to think about establishing Genics and approached CSIRO to ask if I could commercialise MultiPath.

Do you have any advice for people looking to start their own aquaculture businesses?

There are many fabulous people in our industry willing to help and give advice and feedback. Spend some time getting to know who they are and reach out for their advice early. Listen, listen, listen to the industry members, especially the long-standing farmers who have been doing this for many years. They are full of good advice.


By Rob Fletcher -  The Fish Site

Other document

11 THG12

THE PROCESS OF HANDLING FINGERLING FISHES WHEN STOCKING THEM INTO THE POND

Fish when imported to the pond often lose a lot due to:



- Construction during transportation.



 Stress due to changing living environment.



- Easy to get bacteria and fungi to enter the body.


11 THG12

THE CLEANING WORMS, FLUKES IN GUT OF SNAKEHEAD FISH PROCESS

- Internal parasites disease on snakehead fish caused by hookworm, roundworm, tapeworm parasitizing in fish intestine.


11 THG12

DISEASE PREVENTION PROCEDURES FOR SNAKEHEAD

Scientists have not identified the cause of the disease, but only diagnosed the following factors: (1) Fish nutritional imbalance; (2) the stocking density is too thick; (3) End-feeding for a long time continuously; (4) The pond water environment is polluted, there are many environmental toxins, heavy metal contamination and chemical residues; (5) Use antibiotic treatment continuously.


09 THG12

PROCEDURE FOR PREVENTION AND TREATMENT OF hemorrhagic disease and white spots in the internal organs disease of snakehead

White spots in the internal organs disease of snakehead caused by Aeromonas schubertii bacteria.


08 THG12

Procedures for the prevention and treatment of white spots in the internal organs disease of fingerling catfish (Pangasianodon hypophthalmus)

- Fish are lethargic, somber disorientation, white, red head, reddened, bleeding under the skin, fins, anus.


02 THG12

CHINESE CATERPILLAR FUNGUS AND APPLICATION IN AQUACULTURE FISHERIES

Chinese caterpillar fungus, also known as cordyceps, cordyceps, or cordyceps, is a precious oriental herb that is essentially a parasitic form of the Cordyceps Sinensis fungus (belonging to the Ascomycetes group) on the muscle. Deep body Hepialus Fabricius. The medicinal properties of cordyceps have been shown to be due to the Cordyceps Sinensis mushroom extracts.
02 THG12

REPLACE ANTI-BIRTHDAY FROM Hoang Lien (Coptis teeta Wall)

Currently, under the increasing requirements of export markets as well as consumers, the chemical residue in seafood products is being mentioned.



In addition, the incorrect use of antibiotics, treatment regimens, and the use of antibiotics for feeding in aquaculture cause the residues of resistance in the environment quite a lot, leading to more and more antibiotic resistance. fast and serious.



At the same time, the use of antibiotics also destroys most of the intestinal microflora. Adverse effects on aquatic animals affecting the development of aquatic animals.



Herbal antimicrobials are seen as an effective alternative to antibiotics.



Hoang Lien is known to be one of the top herbs for antibacterial, increasing immunity against pathogenic bacteria.


04 THG11

Common diseases of pangasius catfish farmed in Vietnam

Bacterial infections and ectoparasites leading causes of mortalities



The clinical signs of Edwardsiella ictaluri infection in pangasius are numerous white spots on the kidney, spleen and liver.



The freshwater catfish (Pangasius hypophthalmus) is an indigenous fish species in high demand from global consumers. The commercial culture of pangasius in Vietnam provides improved socioeconomic status for thousands of Vietnamese producers.



As in other developing aquaculture ventures, health problems that include disease outbreaks from parasites and bacteria have been encountered. For pangasius, the most important disease problems are caused by the bacteria (Edwardsiella ictaluri), (Aeromonas hydrophila), (A. sobria) and (A. caviae).



Protozoan parasites encountered include organisms of the genera (Microsporidium), (Myxobolus), (Henneguya), (Trypanosoma), (Ichthyonyctus), (Trichodina), (Balantidium) and (Epistylis), as well as IIchthyophthirius multifiliis). Several metazoan parasites and noninfectious problems have also been reported.


04 THG11

A new tool in the battle against decapod iridescent virus (DIV-1)

A new diagnostic tool that can detect a range of aquatic pathogens, including DIV-1, between two and four weeks before clinical signs are apparent to shrimp farmers, has recently been launched by Genics.



Genics' MultiPath technology is now being used in 23 countries and covers over 90 percent of all Australian shrimp / prawn producers



Dr Melony Sellars, CEO of the Australian company, talks to The Fish Site about shrimp pathogens, founding a startup and the wisdom of shrimp farmers.


04 THG11

Prevention of White Feces Syndrome, White Gut Disease and White Muscle Disease in Shrimp

Shrimp culture tends to now be developed intensively with upgraded technology for higher and successful production. On many occasions, shrimp culture is affected by various diseases and experienced in the loss of crop or reduced the production level by various reasons, writes Mr. Prakash Chandra Behera, India.



Intensive and semi-intensive aquafarming accompanies several disease problems often due to opportunistic pathogens as evident from general aquaculture. High stocking densities, high food inputs, and other organic loads stimulate the selection and proliferation of opportunistic pathogens like bacteria, viruses, fungi, protozoa, etc.