[Weiboxin] Beware of Gattavirus (GETV): An Invisible Threat to Pig Farms and Scientific Prevention and Control Strategies

Recently, Getah virus (GETV) has shown an outbreak trend in pig farms across multiple regions, posing a serious threat to the swine industry. This arbovirus, transmitted by mosquitoes, can cause high mortality in piglets and reproductive disorders in sows, resulting in substantial economic losses.

Gentian virus (GETV) belongs to the genus Alphavirus within the family Togaviridae and is a Single-stranded positive-sense RNA virus , possessing an envelope structure. As an arbovirus, GETV is primarily transmitted through Biting by mosquitoes (such as Culex and Aedes) It is transmitted among vertebrates.

Since the virus was first isolated from mosquitoes in Hainan in 1964, its geographic distribution has gradually expanded. Prior to 2006, only six provinces in China had reported the detection of GETV; by 2018, the number of affected provinces had surged to 16.

Currently, GETV is deployed across a vast region stretching from the northeast to the southwest and from the southeast to the northwest.

Clinical signs of GETV infection in pigs vary depending on age and physiological status:

·   Newborn piglets ： Brownish-yellow diarrhea, anorexia, skin erythema, tongue tremor, limb ataxia, and death may occur. The mortality rate can exceed 80%.

· Piglets older than 10 days ： It typically manifests as mental depression, fever (with body temperature reaching over 40°C), decreased appetite, and a significant reduction in daily weight gain.

· Pregnant sows ： The primary clinical manifestation is reproductive failure syndrome, encompassing miscarriage, stillbirth, and mummified fetuses. The miscarriage rate may range from 15% to 25%, with most cases occurring between 60 and 90 days of gestation; the stillbirth rate may be between 10% and 15%.

· Neurological symptoms ： In severe cases of infection, pigs may develop extremely high fevers that are unresponsive to conventional antipyretics, accompanied by neurological signs such as circling, opisthotonus, and sudden seizures. Mortality among nursing piglets can be as high as 50% to 70%.

Common in clinical necropsy Cyanosis, diarrhea, thinning of the intestinal wall, lymphadenopathy, renal cortical hemorrhage, pulmonary hemorrhage, and subcutaneous edema. 。

The clinical symptoms of GETV infection are easily confused with those of Japanese encephalitis and diarrhea, making timely and accurate laboratory diagnosis essential.

In recent years, GETV has shown a clear trend of widespread dissemination in China. According to surveillance data from the National Center for Animal Disease Control and Prevention in 2023, The proportion of pig farms testing positive for GETV has reached 12.7%. 。

In the summer of 2024, a large-scale GETV outbreak occurred in Henan Province, affecting 12 cities and 21 counties, with infections reported at multiple pig farms. This outbreak was caused by A virulence-enhanced variant of genotype GIII This was associated with unique amino acid mutations identified through whole-genome sequencing—P329S, A381T, and V503G in the nsP3 protein, as well as D323E in the E2 protein—which markedly enhanced viral pathogenicity.

Phylogenetic analysis indicates that all currently circulating strains belong to genotype GIII and form a distinct clade separate from the GDHYLC23 strain. Genotype GIII is currently the predominant circulating genotype in Asia; however, the variant identified in this study exhibits significantly enhanced virulence compared with previously reported, relatively mild strains.

In the face of the threat posed by GETV, pig farms should implement comprehensive prevention and control measures:

1. Immunization

Immunizing swine herds before the mosquito and insect season begins is an important measure for preventing GETV6. The recommended immunization schedule includes:

· Breeding Pig Farm: Primary immunization (8 weeks before breeding) + prenatal booster immunization (at 90 days of gestation).

· Commercial Pig Farm: First vaccination at 7–14 days of age, followed by a second vaccination at 21–28 days of age.

· High-incidence areas for the epidemic: Consider administering an additional dose of immunization (7 days after weaning).

Note: Currently, the GETV vaccine for pigs has not yet been commercialized; the above recommendations are based on general principles for the control of arboviruses and on findings from certain studies. For practical applications, please closely monitor developments in vaccine research and development and official guidance.

2. Mosquito-borne Disease Prevention and Control

Cutting off transmission routes is key to prevention and control. Therefore:

· Remove standing water to reduce mosquito and insect breeding sites;

· Install mosquito screens and conduct regular environmental disinfection;

· Use insecticides to control mosquito populations.

3. Strengthen Feeding Management and Biosecurity

· Improve pig herd management and enhance disease resistance;

· During introduction, strict testing is required, with a negative GETV certificate mandated, and the quarantine observation period is extended to 21 days.

· Strictly implement disinfection measures for personnel and vehicles.

4. Monitoring and Diagnosis

· Establish a GETV sentinel surveillance system at pig farms, with a focus on testing mosquito and pig herd samples;

· Increase GETV nucleic acid testing on samples from aborted sows and weak piglets;

· Report any suspected symptoms to the veterinary authorities promptly and cooperate with sample collection and testing.

Guangzhou Weiboxin Biotechnology Co., Ltd. is a high-tech enterprise engaged in the research of biological reagents, product development, and technical services, boasting strong technical capabilities and a team of world-class professionals.

We are committed to providing the aquaculture industry with Precise and reliable testing solutions ， Help you promptly detect disease threats and implement effective prevention and control measures.

In the face of the threat posed by the Gaeta virus, Early Diagnosis and Prevention This is of paramount importance. We recommend that pig farmers closely monitor the health of their herds and promptly conduct laboratory testing upon detection of any suspected symptoms, so that timely intervention can be implemented as early as possible.

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Guangzhou Weiboxin Biotechnology Co., Ltd. is a provincial-level “Little Giant” high-tech enterprise specializing in the forward R&D, manufacturing, sales, and technical services of diagnostic reagents for infectious diseases. The company is also recognized as a “Contract-Honoring and Credit-Keeping Enterprise” by Guangdong Province and a “Provincial Intellectual Property Demonstration Unit.” It serves as an industry–university–research collaboration base for Guangdong Food and Drug Vocational College and holds a standing directorship on the Veterinary Diagnostic and Biological Products Committee of the Guangdong Society of Animal Husbandry and Veterinary Medicine. Furthermore, it has been designated as an innovative, high-potential enterprise by multiple research institutions, including the Entrepreneurship College of Jinan University in Guangdong Province, and has been awarded the titles of “Specialized, Refined, Distinctive, and Innovative” enterprise at both municipal and provincial levels. The company has received the “Most Investment-Valuable Enterprise” award and the annual title of “ASF and Swine Disease Testing Service Provider,” and has obtained approval numbers for veterinary medicinal products from the Ministry of Agriculture and Rural Affairs. : Veterinary Drug Registration No. 191438923 (Fluorescent PCR Test Kit for African Swine Fever Virus) 、 Veterinary Drug Registration No. 191438213 (Porcine Reproductive and Respiratory Syndrome Virus ELISA Antibody Detection Kit) 、 Veterinary Drug Registration No. 191438875 (Classical Swine Fever Virus Blocking ELISA Antibody Detection Kit) and Veterinary Drug Registration No. 191438851 (Porcine Circovirus Type 2 ELISA Antibody Detection Kit) The company has been recognized with the Excellence Award in the Growth Category of the Biopharmaceutical Industry at the 11th China Innovation and Entrepreneurship Competition, as well as the Provincial Second Prize in the Growth Category of the Nanotechnology Industry Technology Competition under the Science and Technology Innovation and Entrepreneurship Contest. Furthermore, it secured the National Third Prize in the Growth Category at the National Finals of the Nanotechnology Industry Technology Innovation Special Competition of the China Innovation and Entrepreneurship Competition. The company has also consecutively received the A-Level Tax Credit Certificate, the Four-Star Trademark and Brand Certification, and the Two-Integration Management System Assessment Certificate each year. In addition, it holds ISO 9001 International Quality Management System Certification, ISO 14001 International Environmental Management System Certification, and GMP Certification from the Ministry of Agriculture. Since its establishment, the company has been granted a total of 24 patents, including 5 invention patents, 15 utility model patents, and 4 design patents, along with more than ten trademarks.

The company boasts robust technical capabilities and a world-class team of professionals, including dozens of masters, doctors, and returnees who studied abroad, as well as numerous senior-title technical experts. Currently, the company’s primary focus is on the R&D of molecular diagnostic reagents. Its core R&D team has developed more than 600 products spanning molecular diagnostics and immunoassays, including public-health–oriented fluorescent PCR test kits, animal disease–control fluorescent PCR test kits, clinical and research-grade fluorescent quantitative PCR kits, and transgenic identification test kits (ZL2006). The company has established a nationwide distribution network covering over ten major cities, such as Beijing, Shanghai, Hangzhou, Nanjing, Wuhan, Xi’an, Yunnan, Chongqing, Chengdu, Guizhou, Lanzhou, Zhengzhou, Qingdao, Inner Mongolia, and Xinjiang. Moreover, its products are now exported to numerous overseas markets, including the United Arab Emirates, Oman, Egypt, Pakistan, Paraguay, Poland, Colombia, Kazakhstan, Mongolia, Bangladesh, Myanmar, Mexico, Nigeria, Saudi Arabia, Spain, Armenia, India, Indonesia, Vietnam, and Cambodia, providing high-quality products and services to customers worldwide.

Looking ahead, Weiboxin will remain steadfast in its commitment to continuously enhance product quality and service standards. Leveraging a rapid and efficient research platform and abundant biomedical resources, we will conduct extensive and in-depth R&D and scientific research in the biomedical field, thereby contributing to human health and advancing life sciences. Quality is our lifeline, and innovation is our soul; we will unwaveringly uphold this philosophy as we strive to become the premier supplier of rapid diagnostic reagents and instruments.