水产养殖中的“虹彩病”是由虹彩病毒（Iridovirus）引起的一类极其严重的系统性、致死性传染病。这类疾病主要攻击鱼类的脾脏、肾脏等造血组织，发病快、死亡率极高（常常可达 90%以上），是全球水产养殖业面临的最具毁灭性的病毒性疾病之一。

"Iridovirus disease" in aquaculture is an extremely severe, systemic, and lethal infectious disease caused by Iridoviruses. This class of diseases primarily attacks hematopoietic tissues such as the spleen and kidneys of fish. It is characterized by rapid onset and an extremely high mortality rate (often reaching over 90%), making it one of the most devastating viral diseases facing the global aquaculture industry.

一、 虹彩病是怎么回事？ / I. What is Iridovirus Disease?

水产养殖中常见的虹彩病毒主要属于巨细胞病毒属（Megalocytivirus）。

Common Iridoviruses in aquaculture mainly belong to the genus Megalocytivirus.

• 症状表现： 感染的病鱼通常表现为体色发黑、嗜睡、鳃部贫血（发白）、腹部肿胀。解剖后会发现脾脏和肾脏异常肿大、出血甚至坏死。 

Symptoms: Infected fish typically exhibit body darkening, lethargy, gill anemia (paleness), and abdominal swelling. Upon dissection, abnormal enlargement, bleeding, or even necrosis of the spleen and kidneys can be observed.

• 易感物种： 宿主范围非常广。在我国和全球范围内，严重受其威胁的经济鱼类包括石斑鱼、鳜鱼、大口黑鲈（加州鲈）、真鲷、罗非鱼等数十种海水和淡水鱼类。 

Susceptible Species: The host range is very broad. In China and globally, dozens of important economic marine and freshwater fish species are severely threatened, including groupers, mandarin fish, largemouth bass, red seabream, and tilapia.

二、 从什么时候开始威胁水产养殖的？ / II. Since when has it threatened aquaculture?

虹彩病毒对水产养殖的实质性威胁始于 20 世纪 80 年代末到 90 年代初。 

The substantial threat of Iridoviruses to aquaculture began in the late 1980s and early 1990s.

• 全球首次确认： 1990 年，日本在养殖的真鲷中首次暴发了大规模的死亡事件，随后分离并确认了致病原为真鲷虹彩病毒（RSIV）。几乎在同一时期，澳大利亚也从红鳍笛鲷中分离出了虹彩病毒。 

Global First Confirmation: In 1990, the first largescale mortality event erupted among cultured red seabream in Japan. Subsequently, the pathogen was isolated and identified as Red Seabream Iridovirus (RSIV). Around the same time, Australia also isolated an Iridovirus from the red emperor snapper.

• 中国的情况： 在中国，虹彩病毒的严重威胁引起广泛关注是在 20世纪 90 年代末。当时广东等地的养殖鳜鱼爆发了大规模的“暴发性出血病”（后被确认为传染性脾肾坏死病毒，ISKNV），给养殖户造成了极为惨重的经济损失。此后，该病毒在石斑鱼、加州鲈等重要养殖品种中也开始频繁爆发。 

The Situation in China: In China, the severe threat of Iridoviruses gained widespread attention in the late 1990s. At that time, a massive outbreak of "fulminant hemorrhagic disease" (later identified as Infectious Spleen and Kidney Necrosis Virus, ISKNV) occurred in cultured mandarin fish in places like Guangdong, causing devastating economic losses to farmers. Since then, the virus has also frequently broken out in important aquaculture species like groupers and largemouth bass.

三、 目前中国和世界上的预防与治理方法 / III. Current Prevention and Treatment Methods

首先需要明确一个残酷的现实：目前全球范围内，针对水产虹彩病毒，没有任何可以杀灭鱼体内病毒的“特效药”。 

First, a cruel reality must be clarified: currently, on a global scale, there is no "specific medicine" (magic bullet) that can kill the Iridovirus inside the fish's body.

由于病毒在宿主细胞内复制，传统的抗生素对病毒完全无效（抗生素只杀细菌）。一旦鱼群开始大规模发病，治疗的成功率极低，目前的策略是“防重于治”。 

Because the virus replicates inside host cells, traditional antibiotics are completely ineffective against it (antibiotics only kill bacteria). Once a largescale outbreak begins in a fish population, the success rate of treatment is extremely low. The current strategy is "prevention is more important than treatment."

1. 现有的主流防控手段（中国与全球通用） / 1. Existing Mainstream Prevention and Control Measures

• 疫苗接种（最有效手段）： 

 · 国际： 日本在 RSIV 灭活疫苗的商业化应用上起步最早，且效果显著。 

· 中国： 近年来取得了重大突破。针对鳜鱼传染性脾肾坏死病和石斑鱼虹彩病毒病，中国已经自主研发了灭活疫苗并获得了国家新兽药证书。通过腹腔注射疫苗，可以提供非常高的保护率。 

Vaccination (Most Effective Measure):

 · International: Japan was the earliest to commercialize the RSIV inactivated vaccine, with significant results.

 · China: Major breakthroughs have been made in recent years. Targeting ISKNV in mandarin fish and Iridovirus disease in groupers, China has independently developed inactivated vaccines and obtained national new veterinary drug certificates. Intraperitoneal injection of the vaccine can provide a very high protection rate.

• 生物安全与检疫（SPF 苗种）： 严格把控源头，使用经过核酸检测证明无特定病原（SPF）的健康鱼卵和鱼苗。同时，对养殖进排水进行严格的过滤和物理/化学消毒，切断病毒在水体中的传播途径。 

Biosecurity and Quarantine (SPF Seeds): Strictly control the source by using healthy fish eggs and fry that have passed nucleic acid testing and are certified Specific Pathogen Free (SPF). Meanwhile, strictly filter and physically/chemically disinfect the inflow and outflow water to cut off the virus's transmission route in the water body.

• 非特异性免疫增强剂： 在饲料中添加免疫多糖（如酵母 β-葡聚糖）、维生素 C/E，以及黄芪、板蓝根等中草药提取物，以提高鱼体自身的抗应激能力和非特异性抗病力。

Non-specific Immune Enhancers: Add immune polysaccharides (like yeast β￾glucan), Vitamins C/E, and Chinese herbal extracts (such as Astragalus and Isatis root) to the feed to improve the fish's own anti-stress ability and non￾specific disease resistance.

2. 前沿探索与绿色替代方案 / 2. Frontier Exploration and Green Alternatives

面对传统化学消毒剂的残留问题和病毒的高致死率，目前的科研和产业界正在积极探索更具前瞻性的绿色防控手段： 

Faced with the residue problems of traditional chemical disinfectants and the high mortality rate of the virus, current scientific research and industry sectors are actively exploring more forward-looking green prevention and control methods:

• 广谱抗病毒纳米材料： 针对水产养殖中替代传统抗生素和化学药物的迫切需求，前沿研究正在探索具有高效杀菌和抗病毒特性的新型纳米材料。例如，利用纳米铜碳复合材料，其能够通过物理或化学机制直接破坏病毒的包膜和结构蛋白，实现极高的病毒灭活率。

这类材料正被研究作为绿色农业防护手段，应用于水体的高效净化或开发为新型功能性饲料添加剂，从根本上阻断病原体在水环境中的存活与传播。 

Broad-spectrum Antiviral Nanomaterials: Addressing the urgent need to replace traditional antibiotics and chemical drugs in aquaculture, cutting-edge research is exploring novel nanomaterials with highly efficient bactericidal and antiviral properties. For example, using nano-copper-carbon composite materials, which can directly destroy the virus's envelope and structural proteins through physical or chemical mechanisms, achieving an extremely high virus inactivation rate. Such materials are being studied as green agricultural protection measures, applied for efficient water purification, or developed into new functional feed additives to fundamentally block the survival and transmission of pathogens in the water environment.

• RNA 干扰（RNAi）技术： 在实验室阶段，科学家正在尝试利用基因沉默技术来特异性地抑制虹彩病毒在鱼体内的复制，但这距离低成本的商业化应用仍有一段距离。

RNA Interference (RNAi) Technology: In the laboratory stage, scientists are attempting to use gene silencing technology to specifically inhibit the replication of Iridovirus in fish, though this is still a ways off from low-cost commercial application.

总结 / Conclusion

总结来说：面对虹彩病，当前的特效方案并非某种“神奇药水”，而是“无毒苗种 + 疫苗注射接种 + 严格水质管控”的综合防御体系。对于爆发期的鱼塘，通常只能采取紧急隔离、使用温和消毒剂控制水体交叉感染、停止投喂以减少应激等保守措施来“保底”。 

In summary: In the face of Iridovirus disease, the current effective solution is not some "magic potion," but a comprehensive defense system of "Pathogen-free seeds + Vaccine injection + Strict water quality control." For ponds experiencing an outbreak, usually only conservative "fail-safe" measures can be taken, such as emergency isolation, using mild disinfectants to control cross-infection in the water body, and stopping feeding to reduce stress.