Vibriosis is a serious disease in fish, crustaceans and shellfish as recognised by the FAO, United Nations. It leads to significant economic losses and affects multiple sectors, thus hindering the development of the country. According to a recent study, the most prevalent species triggering vibriosis in aquaculture farms are Vibrio parahaemolyticus, Vibrio alginolyticus, Vibrio harveyi, Vibrio owensii, and Vibrio campbelli. The pathogenicity of these species is aided by a wide range of virulence factors, which allows them to infect a wide range of hosts [1].
Our aim through AMPifin is to improve pisciculture operations, and consequently increase the yield of fish in the market—a major part of various Indian states’ staple diets. This approach would immensely benefit the economy and fisherfolk by facilitating a sustainable pisciculture industry. AMPifin is a sustainable solution to vibriosis in fish. In line with our project’s work, we carried out extensive work concerning human practices.
The idea for the project provided us with a plethora of possibilities. Still, our literature research and responsibility toward the marine populations reiterated our sense of commitment to prioritise a sustainable approach through our solution. Nevertheless, we encountered numerous challenges during our ideation, research, and experimentation process. We considered how our team could cushion the pisciculture industry. We knew that for our initiative to be successful, we needed to combine and maximise the best aspects of our core values, scientific reasoning, and community involvement.
During the initial stages of our project, we talked to a fish farm owner who introduced us to the disease Vibriosis. We discovered that Vibrio parahaemolyticus is the causative bacteria. Our project’s work began by interacting with an expert in the field of computational biology who guided us on the engineering and designing aspects of our peptide. Through continuous interactions, we received the idea of mimicking fibronectin. As we progressed, we met with some experts who stressed the imperativeness of biosafety aspects and guided us toward a safe delivery mechanism—i.e., implementing chitosan nanoparticle encapsulation instead of bacterial encapsulation. Moreover, they drew our attention to the possible side effects of biomagnification; hence, we ran a toxicity and allergen test on our peptide. As AMPifin came together, we interacted with numerous stakeholders and introduced them to our solution. Through our correspondence, we established a connection with an all-inclusive demographic.
We received numerous comments and ideas after holding several meetings and conversations with specialists, researchers, professors, and farmers. These conversations provided valuable feedback that improved the areas we overlooked in our project and recommended strategies to speed up its development. Without these interactions, AMPifin would be considerably different. To better our approach at each stage, we engaged in a fruitful dialogue with various stakeholders. We conversed with multiple industry specialists, academia, the general public, students, and our project's target consumer—the fisherfolk. This paved the way for our project's advancement, and helped us reflect on AMPifin's objectives effectively. It enabled us to identify the many issues or flaws in our project and identify better solutions with supplementary advantages. Overall, the project benefited by knowing the stakeholders' viewpoints and how human practices affected the project. It helped the project represent its objectives in the most effective way possible. The need to interact with project stakeholders was crucial to us. We benefitted immensely from considering our initiative's potential effects on them and learning about their viewpoints on the matter. The stakeholders we identified are all mentioned here, along with an explanation of why we contacted them and what we discovered.
For our integrated human practices and outreach, reaching out to the fisherfolk was crucial. We gathered information on prevalence, current solutions, and the viability of AMPifin through these visits. The visits covered numerous locations, both national and international.
We sought input from professors working in the field on various techniques, including the viability of our models. Whether it came to our literature surveys or our experimental design, their overall perspectives on our project as subject-matter experts was extremely valuable. Furthermore, to find out the professional-scale research being conducted on our project’s topics that were relevant to our project, we contacted members from research institutes.
We contacted companies in the fields of biotechnology, synthetic biology, and aquaculture. Their input shaped our solution’s commercial viability.
To improve our study of novel approaches such as ours, we wanted to connect with experts in entrepreneurship. They helped us understand how we can work on the future upscaling of our project and the band of stakeholders that would be important to us.
Vibriosis is a disease that affects humans and fish, and to understand its impact in both cases, we consulted doctors who helped us analyse the impact and medical solutions. Through these interactions, we learnt the symptoms and treatment methods of vibriosis in humans. Additionally, we gained more information on the pathogenicity and virulence of V. parahaemolyticus.
As iGEM is a competition based on synthetic biology, there are several biosafety issues that could emerge. Our target organism—Vibrio parahaemolyticus is a Risk Group 2 organism. To avoid any sort of hazards, we decided to not work with this organism for our experiments. Instead, we decided to express our target molecule–MAM7 via E.coli.
Human practices and community engagement formed the backbone of our project. The conversations we had with the multiple individuals helped us gain a holistic perspective of the problem. The insights and opinions helped us shape our project. After every interaction, our team sat together and reflected upon the content of the meetings in order to make improvements to our solution.
Following our session on reflection on the community engagement programmes, we implemented their opinion to the best of our ability. Since this project was created to help out the local people and the problems they face, incorporating their opinions and needs into our project was crucial. Our project trajectory changed majorly due to their input. Public opinion is a key aspect for development of any product, and thereby it has contributed majorly for the amalgamation of our project.
References“Local people solving local problems” is a phrase that describes AMPifin accurately. Following a value-centric approach, we noticed that Manipal being a coastal town is home to a massive aquaculture industry setup. As our conversations with various stakeholders and communities developed, we came across Mr. Kaushik Alike, who introduced us to Vibrio parahaemolyticus and the diseases it causes. This bacteria piqued our curiosity, and through this interaction, we fixated on our problem statement and decided to build on it systematically.
The food-chain supply for seafood consists of hatcheries, farms, markets, restaurants, and finally, consumers. To understand the impact of vibriosis, we interacted with various stakeholders from in and around India in Maharashtra, Karnataka, Hyderabad, Tamil Nadu and Kerala, and internationally, in Dubai. These interactions helped augment our project and accelerated its growth.
On 21st November 2022, we contacted Kaushik Alike, one of the founders of Canares Aquaculture. He spoke to us about various topics, including parasites and viruses, as well as feed and water purification. We learnt about the major diseases in fish and the present methods of prevention and cure. He was the one who first mentioned Vibrio parahaemolyticus and Oxytetracycline to us. We decided to work on the bacteria Vibrio parahaemolyticus owing to the insightful conversation we had with him.An aspect he emphasised was the significance of not entirely eradicating all microorganisms from the water body. He also discussed several strategies for distributing feed and raising fish.
To gain more knowledge of areas outside of our locality, we decided to approach a government hatchery to get more information about the prevalence of vibriosis.
On 1st July 2022, we visited a Government Shrimp and Fish Hatchery in Azhikode, Kerala, India . We interacted with their association members—Assistant Fisheries Extension Officers—Mrs. Merit Kurian, Mrs. Devi Chandran, and Mr. Vinu Jacob. The primary focus of this institution is to hatch shrimp and fish for 20–25 days using biofloc technology and then sell them to various fish farmers.
They mentioned that the main types of fish that are hatched are Etroplus and Pompano. They elaborated on the primary local diseases observed in their farm. It astounded us to hear that there are multiple species responsible for various levels and types of pathogenicity. The fisherfolk mostly look for cuts or bruises found on the scales and the fish's skin for early detection of any diseases. To avoid necrosis, a significant symptom of vibriosis, pretreatment methods are employed immediately after the seeds are hatched. In the case of an infection, antibiotics are used as a treatment method. They emphasised on how the dosage has seen a surge over the years. Furthermore, they mentioned that detection is primarily carried out via PCR. Their hatchery consists of massive units, maintained at a temperature varying from 25-28 degrees celcius using regulated heaters, and the salinity of the water is maintained at 20 ppm. Through this visit, we learnt about the various methods to identify the levels of pathogenicity and how fisherfolk differentiate between diseased and healthy fish. We also learned more about methods by which they prevent or cure bacterial infections in fish.
When we explained AMPifin to them, they were interested in our solution's approach. In particular, they were impressed with our focus on sustainability. In particular, they were keen on exploring a solution that has no known side effects and is unlikely to induce antibiotic resistance. Through this visit, we comprehended the large-scale working of fish hatcheries and developed an understanding of how AMPifin can be stitched toward being a more operational solution. The data we received from them was valuable and helped improve the interpretation of our literature surveys. Furthermore, we gained confidence in our sustainable approach and focused on making AMPifin more understandable to our main stakeholders.
Fish markets are the hub for fish trade and team AMPifin decided to interact with them to understand the food-supply chain and their methods of identification for diseased fish. Furthermore, the platform served as a location to interact with consumers, too.
On 6th July 2022, we visited Laxmipuri Fish Market located in Kolhapur, Maharashtra, India. It is owned by Mr. Ashish, Mr. Kiran, and Mr. Ashok—fish sellers and consumers from a local fish market. They mentioned that their fish market receives over a hundred varieties of fish from the Ratnagiri district of Maharashtra. The fish supply is stored and sold for two to three days until freshness is retained. Furthermore, in case any spoilage is detected, they discard the fish immediately in a safe manner. As we conversed with them, we realised that the methods of prevention of diseases in most seafood shops were nebulous, especially for the wild-caught ones. Since most of them were sellers and not pisciculture farmers, they did not have much knowledge on the various medicines used in fish hatcheries. We explained our project to them and they provided us with their opinion on selling or consuming seafood that has been treated with our peptide. Since most were sellers and not pisciculture farmers, they did not know much about the various medicines used in fish hatcheries. Furthermore, they were encouraging of more such sustainable solutions. From this visit, we understood the importance of consulting secondary stakeholders, who are a critical part of the food supply chain.
On 8th July 2022, we visited Mr. Sampath's shrimp and fish farm in Chennai, India. While showing us around his farm, he elaborated on the two main species of shrimps grown—giant Tiger prawns (Penaeus monodon) and Whiteleg shrimps ( Litopenaeus vannamei). The salinity range maintained in his farm roughly accounts for about 25%, along with a pH range of 8.5, and the breeding period is usually carried out for four months. He mentioned how these conditions were applicable for fish as well.
For fish, any disease is detected by visual cues—cuts, scars, bleeding on the skin, and necrosis. The detection of such diseases is carried out by testing the water with a calcium soda mix. Since AMPifin could potentially be a broad-spectrum solution for all gram-negative pathogens, we were delighted to see such accepting nature toward the utilisation of our solution.
On 8th July 2022, we visited the Indian Council of Agricultural Research—Central Institute of Brackishwater Research (ICAR-CIBA) located in Chennai. We met with Dr. M Shashi Shekar and his team consisting of Dr. Ashok, Dr. Raymond, Dr. Sujeet and Dr. Patil who are currently working on vibriosis in fish. We felt that the information they had would benefit our project’s geographical statistics and research-related data. There was a brief discussion about the types of projects they were working on for the research-oriented communities and looking for potential areas in which they could be of great help to us. Dr. Shekar introduced us to his lab and team. The exchange of scientific data and information was fruitful to our project's advancement.
We visited The Al Fahlain fish farm in Dubai, UAE, headed by Mr. Liju, to check the prevalence of vibriosis in locations outside of India. Initially, he exchanged data about the food they usually feed the fish, which were mostly floating pellets that they import from Saudi Arabia and sinking pellets which are rich sources of protein imported from Turkey.
They indicated that vibriosis is a common disease in fish in that area, but due to restricted lab facilities, it is not usually tested.
From our visit, we observed that they use antibiotics to treat these infected fish and the most commonly used one is Oxytetracycline (OTC). OTC is a broad-spectrum antibiotic and is hence helpful in most common diseases. Erythromycin was used previously along with OTC but isn’t effective for many diseases anymore, and hence, it has been banned in many countries, including India and Dubai. In cases where they cannot detect the disease in the fish, they usually flush the column with salt water if freshwater fish are being grown and vice versa. They spend approximately 1% of their income treating these fish (approximately 500 AED—i.e., 136 USD). To reduce the number of infected fish imported, they usually run a PCR test from the country of import. This has reduced the mortality rate of fish by 20%.
Apart from these diseases in fish, the main cause of diseases in this fish farm was the high-density culturing of fish, due to which the oxygen level and space for each fish reduces. They have external liquid oxygen that is usually pumped into the fish columns depending on the need and necessity.
This visit helped us analyse the prevalence of vibriosis outside of India as well. Furthermore, we distributed large-size pamphlets on the safe usage of antibiotics, and explained AMPifin to the fish farm owners.
We visited Aquatic Biosystems in Mangalore, owned by Mr. Ronald D’Souza. He set up Aquatic Biosystems in 2006, which is currently the largest ornamental fish farm in the state. He began by talking to us about the history and origin of his biosystem. As he showed us around his fish farm he spoke about the major diseases they face. He mentioned that viral and bacterial infections are quite common. If there are any symptoms of bacterial infections, they isolate the fish and send a sample to the lab at the Fisheries Institute, Mangalore. The common bacterial species they have to deal with are Aeromonas species, Vibrio species and Pseudomonas species. The common treatment methods for these are Oxytetracycline (OTC) and Enrofloxacin (ENR). Of these, OTC works better than ENR. However, if OTC does not work, they use Seromycin followed by lab testing.
Every year, they face a loss percentage of 5–10% due to different types of diseases. On explaining our project to him, he was eager to see the result. He explained how the pipe fittings and the connections were formed in order to incorporate various water filters. This paved the route for our delivery mechanism to find an appropriate real-life application. Given the description of the Recirculatory Aquaculture System (RAS) in his farm, we made our implementation design to increase the feasibility of integrating AMPifin in fish farms. He displayed eagerness toward our project and said that solutions like AMPifin are required owing to antibiotic resistance becoming a rising concern.
To understand the impact of vibriosis on our secondary stakeholders—i.e., seafood restaurant chefs and owners, we decided to visit a renowned restaurant in the Udupi region of Karnataka. We wanted to observe the various procurement, cleaning, sanitisation, and cooking practices carried out by the hotel administrators. Furthermore, we wanted to understand the impact and significance of our solution at this stage of the food supply chain.
On October 3rd 2022, a few of our team members visited Hotel Thimappa—a seafood restaurant in Udupi, Karnataka. We spoke with the owner about how the fish is stored and prepared at their restaurant. He explained that the monsoon season around July to October is the best time of the year for fishing. For the past 40 years, the restaurant has purchased its fish from the same vendor located in and around the coast of Malpe. When we enquired if they receive diseased or rotten fish from the vendors, they replied that most of the time they sort out all the fish right after they are caught, so that the disease spread is contained. However, during the months of May and June, they may have more probability of receiving rotten fish as they are less available at this time and refrigerated for longer durations. To gain more insight on the issues that restaurants face with diseased fish, we enquired about the different ways by which they recognise diseased fish. The chefs told us that if it is a rotten fish, it can be distinguished while cleaning due to the difference in texture and smell. However, if it is a diseased fish, it is hard to detect while cleaning. These fish are identified during the cooking stage.
We introduced them to our project—AMPifin and they were inquisitive about our delivery mechanism. From this visit, we understood the effects of diseased/rotten fish on different stages of consumption. We also learned the methods of segregating rotten or diseased fish at a seafood restaurant. We ended this visit by trying two of their famous seafood dishes. The dishes were absolutely delicious, and highlighted how these cuisines form the backbone of our rich Indian culture. This visit helped us broaden our stakeholder interaction spectrum and understand the prevalence of vibriosis at various stages of the food-supply chain.
On 7th October 2022, we collaborated with the Astronomy Club, Manipal to talk about synthetic biology and its applications in the space industry. The podcast comprised two members of the Astronomy Club and two members of Manipal BioMachines. The podcast started off with an introduction to the respective members and iGEM. The discussion was based on how synthetic biology could be used to enhance and use the extreme environments of space to our advantage. For example—extremophiles for the elimination of biowaste and synthesis of biomaterial, self healing bio-compounds for integrity of the space shuttle, and nutrient-rich-space-conserving food given the limitation on resources that can be carried. There were talks about previous iGEM teams’ projects that built on the motive of improving space travel quality for the travellers by integrating pure synthetic biology based components.
This podcast was an opportunity for us to collaborate with astrophiles and understand their areas of interest. By engaging with the astrophile community, we were able to spread the idea of synthetic biology to various groups. Astrobiology is a vast field and has developed for itself avid learners. Through this podcast, our aim was to introduce them to a novel field under the same branch of science. Refer to our collaboration section to listen to the podcast.
To understand the perception of the general public on the pisciculture industry, we rolled out an exhaustive consumer survey. This survey helped us understand the opinion of the general public on sustainable solutions based on synthetic biology. The responses brought a broader perspective to our project, and it was interesting to see the level of awareness amongst various seafood consumers on diseases in fish and their prevalence. Attached below is a detailed consolidation and summarised inference:
Fish is a source of high protein, vitamins and nutrients for humans. With the population surge, the requirement for nutrition has skyrocketed. The aquaculture sector plays an important role in the breeding of fish. India, being a peninsula, is a major contributor of this sector.
The Department of Fisheries, Ministry of Fisheries, Animal Husbandry and Dairying, are implementing a flagship scheme “Pradhan Mantri Matsya Sampada Yojana (PMMSY)”—A scheme to bring about Blue Revolution through sustainable and responsible development of the fisheries sector in India. This scheme has seen the highest-ever investment of approximately INR 20,050 crore (approximately USD 2,434,226,390) for five years, with effect from the financial year 2020–21 to 2024–25 in all states/union territories [1]. Despite these initiatives, India presently accounts for about 7.56% of the global production of fish [2].
Since Udupi is a coastal town, this district contributes considerably to the production of fish in India. As a group of undergraduate students, our insight into this world and people's problems are limited. Therefore to promote the iGEM values of “local people solving local problems,” we began with our journey to understand the problem and find its root cause.
We received our problem statement through a telephone meeting with Mr. Kaushik Alike, the owner of Canares Aquaculture LPP. Our interest in this topic grew as we spoke to many more experts, scholars, fish farmers, etc., after which we chose our target bacteria Vibrio parahaemolyticus. Their inputs steered us towards formulating the most appropriate solution that would be sustainable in the long run. Our human practices efforts have been the backbone of our project since the beginning. Through our timeline, we have represented our interactions and their magnanimous impact toward AMPifin.
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