Table of Content

22 December 2022, Volume 47 Issue 6

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Analysis on the current situation and sustainable development of waterfowl industry in Guangdong Province under the COVID􀆼19

JI Yuanyuan，HUANG Dechun* ，HUANG Shujian，LIN Lichao

2022, 47(6):  1-3.  DOI: 10.19978/j.cnki.xmsy.2022.06.01

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Guangdong Province is a large province of waterfowl breeding and consumption. Affected by the COVID??19，Guangdong’s waterfowl industry has faced severe challenges. This paper is aiming at the problems of the waterfowl industry in Guangdong，such as lack of scientific planning，insufficient investment in research and development，small industrial scale and environmental constraints lack of development and utilization of variety resources and high costs for disease prevention and control. This paper analyzes the current situation of waterfowl industry and proposes to improve the technical system of waterfowl industry. optimize the industrial layout，cultivate leading enterprises，improve the added value of products and strengthen the construction of epidemic prevention system. create a good environment，improve the market competitiveness and provide reference for the sustainable and healthy development of waterfowl industry.

Correlation between intramuscular fat and marbling scores of endemic or lean pigs

LI Hao, ZHANG Zhenxuan, HU Bin, XIN Haiyun, WANG Sutian, CHENG Leiyan, LI Jianhao, YAO Zekai, MENG Fanming

2022, 47(6):  4-9.  DOI: 10.19978/j.cnki.xmsy.2022.06.02

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By measuring and manually scoring the intramuscular fat of lean ternary hybrid pigs，Tianlu black pigs，Xiaoerhua pigs，Yuedong Black pigs，and Tibetan pigs，the intramuscular fat of local pig breeds and lean pig breeds was explored. and marbling scores. 80 lean ?meat ternary hybrid pigs，48 Tianlu black pigs，Xiaoerhua pigs， Yuedong black pigs，and Tibetan pigs（8 pigs each）were used as test materials for the determination of carcass bodyweight，eye muscle area and intramuscular fat. Manual scoring was performed using the American NPPC standard colorimetric card，and after taking the average，bioinformatics methods were used to explore its correlation. This experimental study found that the intramuscular fat distribution of lean pigs is more uniform，the fat cells of local pig breeds are evenly distributed among the muscle fibers，the muscle fiber gap of lean pigs is small，and the distribution of fat cells in the muscle is relatively concentrated. The marbling scoring method is suitable for the simple and rapid evaluation of the intramuscular fat content of lean pigs，but it is not suitable for the evaluation criteria of the intramuscular fat content of all local pig breeds.

Construction of candidate strains of recombinant Ⅶ Newcastle disease virus for vaccine

ZHOU Jie1，2 ，SUN Huimin3 ，DONG Jiawen1 ，LI Linlin1 ，ZHANG Junqin1 ，HUANG Yunzhen1 ， WANG Zhaoxiong2* ，SUN Minhua1*

2022, 47(6):  10-14.  DOI: 10.19978/j.cnki.xmsy.2022.06.03

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Newcastle disease is an infectious disease that must be controlled and eradicated in China. In order todays after immunization，the average HI titer of serum collected from rLa ?mGM inactivated vaccine and commercial LaSota vaccine was 7.6log2 and 7.4log2，respectively. These results indicates that the recombinant virus is immunogenic and can be used as a vaccine candidate strain. generate antigen ? matched vaccine，the main antigenic ? related fusion and hemagglutinin ? neuraminidase genes of LaSota vaccine strain were replaced by those genes of GM strain belonging to genotype Ⅶ，and the recombinant virus rLa ? mGM was obtained by virus rescue. Biological characteristics of rLa ? mGM showed that the MDT of the recombinant strain was 160 h，the ICPI was 0，and the EID50 was 10-8.4 /0.2 mL. The rLa?mGM strain was propagated to prepare an inactivated vaccine at 108.0 EID50 and immunized 10 SPF chickens of 25?day?old with 0.2 ml/each. At 14

Research on Biological Characteristics of Eimeria tenella ETYF strains

LIN Xuhui1，2# ，WEI Guangwei1，2# ，HUANG Guangyu3 ，HUANG Gengxiong3 ，QI Nanshan1，2 ，LI Juan1，2 ， YAN Zhuanqiang 1 ，YIN Lijuan1 ，YU Shuilan1 ，LV Minna1，2 ，HU Junjing1，2 ，CAI Haiming1，2 ， LIAO Shenquan1，2* ，SUN Mingfei1，2*

2022, 47(6):  15-20.  DOI: 10.19978/j.cnki.xmsy.2022.06.04

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In this study，Eimeria tenella YuFu（ETYF strain）was isolated from a broiler farm in YuFu city，Guangdong Province. The methods of animal passage，microscopy，and PCR were used to identify Eimeria tenella. Coccidia ETYF species and its biological characteristics such as minimum prepatent period，oocyst excretion pattern，pathogenicity，and pathogenicity were monitored. The results showed that the minimum prepatent period could be continuously monitored 144 hours after the chickens were infected with ETYF strains of coccidia；Among them，the ET?3 group（30000 piece/ bird dose）had the highest peak at 168～174 hours after infection with ETYF，and the total number of oocyst excretion reached the largest during this period，reaching as high as about 14.47 million piece /dose. The optimal inoculation dose was 10000?30000 piece /bird dose；dead chickens appeared in ET?5 （50，000 piece /bird dose）and ET? 10（100，000 piece /bird dose），and the pathogenicity dose was 5.0×104 piece /bird dose. This study provides data support for subsequent drug screening and vaccine development. which has certain significance for the control of chicken coccidiosis.

Efficacy of a Chinese herbal compound against Microsporum canis infection in rabbits

LIN Renzhao1 ，XU Chunrong2 ，ZHI Chanping3 ，LIN Fei1 ，CHEN Jiaxin1 ，SU Yalin1 ，SHI Dayou1*

2022, 47(6):  21-25.  DOI: 10.19978/j.cnki.xmsy.2022.06.05

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In order to evaluate the efficacy of a Chinese herbal compound on Microsporum canis infection inefficacy yielded a non ? significant difference with terbinafine treatment. This study showed that the Chinese herbal compound had significant therapeutic effects on experimental rabbits infected with Microsporum canis，which can provide experimental data and theoretical basis for the use of a combination of Chinese and Western medicines in the treatment of dermatophytosis in animals in the pet clinic. rabbits，a Microsporum canis infection model of rabbit skin was developed for different treatments. The rabbits were divided into blank control group（K），model control group（M），herbal compound treatment group（CM）and terbinafine treatment group（T）. The results showed that the Chinese herbal compound significantly reduced the skin damage score（P<0.05）and significantly reduced the number of Microsporum canis on the skin wounds（P<0.05）， significantly improved the clinical symptoms of the rabbits and promoted tissue repair. The combined evaluation of its

Research progress on evaluation and influence factors of chicken meat quality

ZHANG Li1，2 ，XU Xinchun1 ，LUO Wei1 ，LUO Chenglong1 ，CHEN Peng1 ，YAN Xia1 ，LI Ying1* ，ZHANG Dexiang2*

2022, 47(6):  26-33.  DOI: 10.19978/j.cnki.xmsy.2022.06.06

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Chicken is one of the main sources of meat protein with gradually increased proportion in the national meat consumption，therefore consumers are paying more attention to the meat quality. Influenced by the COVID pandemic and bird flu，the market of frozen chicken products is increasing. However，the quality of frozen chicken products generally declines significantly over time. Therefore，breeding researchers not only pay attention to improving broiler production performance，but also study meat quality improvement strategies in large ?? scale production. According to previous studies，the evaluation and detection methods of chicken meat quality varied between reports，yielding inconsistent results. In order to provide references and basic data for building the chicken meat quality evaluation system and the improvement of chicken quality，the evaluation methods （e.g.，physical indicators， chemical composition and sensory evaluation），detection index（e.g.，pH value，meat color，tenderness，water holding capacity，composition of amino acids and fatty acids），and the influencing factors（e.g.，breed，age，feed composition，management，pre??slaughter stress）of chicken meat quality were summarized in this paper.

Research progress on zoonotic tuberculosis vaccine

ZHANG Pian1 ，CHEN Qiang2 ，ZHU zhisen3 ，HUANG Yuhao4 ，LI Guanghong5 ，WANG Xiaohu1* ， WANG Gang1* ，GUO Zhaowen6

2022, 47(6):  34-39.  DOI: 10.19978/j.cnki.xmsy.2022.06.07

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Tuberculosis is a chronic infectious disease caused by Mycobacterium tuberculosis. Due to the lack of effective treatment drugs，tuberculosis is still widespread in the world，seriously endangering people's health. The BCG vaccine（Mycobacterium Bovis bacilli Calmette ?Guérin，BCG）is the only TB vaccine currently registered for humans，although BCG can create resistance to TB in children，it cannot effectively prevent tuberculosis in adults and the elderly. And with the increase of drug?resistant strains and HIV mixed infection，it is urgent to develop a safer and more effective vaccine than BCG. This article provides a review of the immune mechanisms of tuberculosis，the shortcomings of BCG，and the research progress for candidate tuberculosis vaccines.

Research progress on the effective ingredients and pharmacological effects of Atractylodes macrocephala

WEI Haitao1 ，FANG Qiuhua2* ，ZHANG Bingshun2 ，LIU Ziyao2 ，LIU Shuojia2

2022, 47(6):  40-44.  DOI: 10.19978/j.cnki.xmsy.2022.06.08

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Atractylodes macrocephala，warm in nature，sweet and bitter in taste，has the functions of invigorating the spleen and nourishing qi，dryness dampness，calming fetus and preventing perspiration. Atractylodes macrocephala extract contains volatile oils，polysaccharides，lactones and other active ingredients，and has a variety of pharmacological effects，such as improving the stomach，regulating immunity，anti?inflammatory and antibacterial， regulating hormone secretion，anti?oxidation，anti?aging，and anti?tumor. In this paper，the research progress on the active ingredients，pharmacological effects and adverse reactions of Atractylodes macrocephala and its extracts was reviewed，which provides a basis for the clinical application of Atractylodes macrocephala and the development of new veterinary drugs.

Research progress on pasteurella multocida vaccine

ZHAO Mengpo1 ，ZHU Zhisen3 ，HUANG Yuhao4 ，WANG Xiaohu1 ，SHEN Liping5 ， YUAN Zigou2* ，WANG Gang1* ，GUO Zhaowen6

2022, 47(6):  45-51.  DOI: 10.19978/j.cnki.xmsy.2022.06.09

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Pasteurella multocida?associated disease is a human?animal disease caused by Pasteurella multocida （Pm），which is widespread in most parts of the world. Infection with Pm in cattle，sheep，pigs，rabbits，and otherlivestock can cause hemorrhagic septicemia and infectious pneumonia，causing huge economic losses to the livestock and poultry farming industry. At present，the prevention and control of Pm disease is mainly through the vaccination of livestock with attenuated Pm vaccine and inactivated vaccine，but because Pm has different serotypes，the immune protection of Pm vaccine on animals is less than ideal. Therefore，this paper summarizes the typing of Pm，the characteristics of Pm virulence factors. and new findings in the research of Pm genetically engineered vaccines，to provide reference for the research of new Pm vaccines and the development of immunization strategies.

The exploration and practice of animal husbandry innovative talents training mode under the background of New Agricultural Science

GAO Chunqi* ，JIN Chenglong，WANG Xiuqi

2022, 47(6):  52-54.  DOI: 10.19978/j.cnki.xmsy.2022.06.10

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The cultivation of innovative talents is not only the core task for the country to build a world ? class university and a first ? class discipline，but also an important prerequisite for the realization of the goal of New Agricultural Science. Animal husbandry is the pillar industry of agriculture and rural economy in our country，and college students，as the main executors of future scientific research，play an important role in the development of animal husbandry. The cultivation of scientific research innovation ability of college students should follow the process of discovering，analyzing，putting forward，solving and perfecting problems. This paper discusses how to guide the subjective initiative of college students in the perspective of New Agricultural Science，hoping to provide reference for the establishment of innovative talents training model of animal husbandry in our country.

Analysis on prevention and control of avian infectious bronchitis in layers

LIAN Cong1 ，ZHOU Xiurong1 ，TAN Qingtian2 ，GAO XiaoPeng1 ，LV Dianhong1 ，LUO Shengjun1 ，JIA Chunling1 ， CHANG Qi1 ，WEN Xiaohui1*

2022, 47(6):  55-62.  DOI: 10.19978/j.cnki.xmsy.2022.06.11

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Infectious Bronchitis （IB） is an acute，highly contagious upper respiratory disease caused by Infectious Bronchitis Virus（IBV），which leads to a variety of symptoms such as tracheitis，nephritis，oviductitis， glandular gastritis and reduced egg quality in chickens，seriously affecting the economic benefits of chicken farming are seriously affected. Immunization with commercial vaccines are the main means of prevention and control of IBV，however，immunization failure happens occasionally. In this paper，through the identification of virulent strains， vaccine screening，immunization monitoring and appropriate biosecurity prevention and control measures in an IBV ? positive layer farm in Qingyuan，the IB epidemic in the layer farm was contained and production resumed rapidly， reducing economic losses.

Epidemiological investigation of Chicken infectious viral gonadal gastritis in the eastern region of Guangdong

CHEN Jun 1，2 ，LI Xiu1，3 ，QI Nanshan1 ，LIAO Shenquan1 ，LI Juan1 ，LV Minna1 ，LIN Xuhui1 ，CAI Haiming1 ， HU Junjing1 ，ZHONG Yaoguang4 ，ZHUO Fuqiu4 ，ZHANG Jianfei1 ，SUN Mingfei1* ，LI Guoqing3*

2022, 47(6):  63-69.  DOI: 10.19978/j.cnki.xmsy.2022.06.12

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In order to investigate the main causes and infection of chicken Transmissible viral proventriculitis （TVP）in the eastern Guangdong，490 samples of diseased chicken were dissected and tested for relevant viruses at ten in one. Our results showed that the disease causing chicken infectious virus gonaditis in this area was mainly immunosuppressive disease. The major pathogen included chicken infectious anemia virus with a highest infection rate of 53.1%（26/49），and Marek's disease virus ranked second with 28.6%（14/49）. In addition，the detection rate of Reticuloendotheliosis virus and Circovirus type 3 virus was 14.3%（7/49），but other viruses (e.g.，avian infectious bronchitis virus) were not detected. Our research indicated that the virus causing immunosuppressive diseases may be the main factor of TVP in the eastern Guangdong. The susceptible infection age of chicken TVP was from 28 to 92 days，the infection period was common in summer，autumn，but rare in spring. This is a systematic research on the main cause and infection situation of chicken TVP in the eastern Guangdong，and it will provide guidance for avain TVP prevention and control in this area.

The Influence of common disinfectants and detergents on the Test Results of H5 subtype avian influenza virus by the Fluorescent Quantitative RT􀆼PCR

LU Shousheng，WU Liyang，YE Jian，XU Xuiqiong，YU Xiyao，WAN Fuguang，SUN Bolin，ZHONG Wenxia

2022, 47(6):  70-73.  DOI: 10.19978/j.cnki.xmsy.2022.06.13

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The emerging novel H5N8 subtype of avian influenza is highly pathogenic and exerts a major threat to the poultry industry. Strengthening monitoring is an important means to prevent and control avian influenza. With the improvement of the biosafety level in the industry，disinfectants have been widely used in various production procedures. How these substances affect the detection results of the current common fluorescent RT ??PCR method is rarely reported. In this paper，simulated samples were used to study the effects of disinfectants（i.e.，quicklime， caustic soda，sodium dichloroisocyanate，and glutaraldehyde），detergents（i.e.，washing powder and detergent）， protectants（i.e.，glycerol and cephalosporin），and environmental pollutants on the detection results of fluorescent RT?? PCR. Compared with the corresponding positive control samples，disinfectants had a very significant impact on thedetection results. Samples treated with 0.5% quicklime and 0.25% caustic soda could not be detected as positive. Sodium dichloroisocyanate of conventional concentration increased CT value by 10.29 to 10.61，and glutaraldehyde increased CT value by 4.77 to 12.68. Neutralization measures for samples containing alkaline disinfectants could improve the test results. Other detergents，sample protectants and dirt had certain impacts on CT value，but the differences were not significant. The results shows that conventional disinfectants have an impact on the detection results of fluorescent RT??PCR. Attention should be paid especially in the evaluation of disinfection effect.

A case of canine hip dysplasia treated with acupuncture and moxibustion based on traditional chinese veterinary medicine

HU jingkai1# ，BAI qianqian2# ，YE jingyue1 ，ZHANG yanhong1 ，JI yanju1*

2022, 47(6):  74-77.  DOI: 10.19978/j.cnki.xmsy.2022.06.14

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Canine hip dysplasia is one of the more common clinical hereditary diseases. Treatment methods include conventional conservative treatment and surgical operations such as three pelvic incisions and total hip replacement. Considering various factors，some pet owners will choose total hip replacement surgery as the final choice，and are also eager to find a treatment method between conventional conservative treatment and total hip replacement surgery. In recent years，breakthroughs in the basic theory of acupuncture and moxibustion have brought acupuncture and moxibustion medicine to an unprecedented new height. This article takes a case of hip dysplasia in a golden retriever as an example to comprehensively introduce the diagnosis and treatment process of traditional Chinese veterinary acupuncture and moxibustion，so as to provide veterinarians clinical use of traditional acupuncture and moxibustion. It provides new ideas for the treatment of canine hip dysplasia，and opens up a new situation for the treatment of canine hip dysplasia in multiple，multi?form，and multi?channel ways.

Problems and solutions in the development of cattle and sheep breeding in South China

HUANG Yuan1 ，WANG Xiaohu1 ，LI Guanghong2 ，WANG Gang1*

2022, 47(6):  78-81.  DOI: 10.19978/j.cnki.xmsy.2022.06.15

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As the demand for beef，lamb and milk increases，the recent years have witnessed opportunities of development for the cattle and sheep breeding industry，which is also facilitated by supportive policy of the government. This paper aims to identify the strengths and weaknesses of the cattle and sheep industry in South China， and to seek possible solutions to enhance the situation based on solid analyses. As per our examination，the strengths include the access to an enormous market，rich grazing resources，quality local breeds，and strong policy support. Theweaknesses include the rather large proportion and low quality of small??scale farms，serious problems with feed supply large??scale farms are facing，climate related difficulties in disease prevention，productivity and forage storage，low breed quality，and an incomplete industrial chain. Solutions were offered in this paper as well. The industry should encourage large??scale farming companies to incorporate with business sectors both up and down the industrial chain. Leading companies could benefit from provide financial support and technical services for small farms. Cooperation may be built between research institutes and farming companies to promote technologies.

Comparison of Three Cases of Feline Lower Urinary Tract Disease Treated with Traditional Chinese Medicine and Western Medicine

ZHU Yongqi1 ，LIU Cui1 ，LV Weijie1 ，LUO Shengyang2 ，GUO Shining1*

2022, 47(6):  82-86.  DOI: 10.19978/j.cnki.xmsy.2022.06.16

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Feline lower urinary tract disease is a general term for various diseases involved with the urinary bladder and urethra in cats. Through the study and analysis of three cases of feline lower urinary tract syndrome，this report reflected and summarized the diagnostics，treatment and prognosis，and focused on the comparison of the therapeutic effect of exclusive use and combination use of CYSTAIDPLUS and Bazheng powder respectively. The results showed that the combination of CYSTAIDPLUS and Bazheng powder had synergistic effect，which could shorten the treatment time.

A review on antiepileptic efficacy of Bupleurum Chinense DC. & Gastrodia elata Bl.

SONG Shihao1 ，LI Xinran2 ，WAN Jinyi1 ，YANG Xiaoyu1，3 ，LIN Yuwei4* ，LIN Jiahao1，3*

2022, 47(6):  87-92.  DOI: 10.19978/j.cnki.xmsy.2022.06.17

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Epilepsy，or“Xian Disease”in Traditional Chinese Medicine，is one of the common neurological diseases. Traditional Chinese Medicine theory believes that the onset of epilepsy is often associated with the liver wind，so most of the time the liver treatment is elected which calms the liver wind and harmonize bodyand Qi. Bupleurum chinese DC. and Gastrodia elata Bl. are two kinds of traditional Chinese medicine commonly used in the treatment of epilepsy. The active ingredients of Bupleurum chinense DC have been suspected to conduct anti?epileptic effect by changing the intracellular ion concentration through multiple pathways，including regulating the secretion of neurotransmitters and significantly increasing the content of ATP by regulating the presynaptic calcium ion pathway. The active ingredients of Gastrodia elata Bl. can effectively change the pathological state of epilepsy by protecting neurons in the hippocampus， inhibiting inflammation in the hippocampus and regulating the secretion ofneurotransmitters. In this paper，the antiepileptic effect of these two Traditional Chinese Medicine was reviewed to provide references for clinical treatment and drug development for canine epilepsy.

A case on diagnosis and treatment of gallbladder mucocele in Pomeranian dogs

BAI Zhitao1 ，GONG Liwei1 ，SONG chen1 ，LIN Lin1 ，LIU Linghan2 ，LIU Yuqing1*

2022, 47(6):  93-94.  DOI: 10.19978/j.cnki.xmsy.2022.06.18

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Gallbladder mucocele is a gallbladder disease with abnormal accumulation of large amount of mucus in the gallbladder，which makes the gallbladder expand. The main clinical manifestations are vomiting and diarrhea. In this paper，the case of a 14 ? year?old Pomeranian dog with gallbladder mucocele was reported. The dogs was presented with symptoms of vomiting and decreased appetite. Blood biochemical exam showed the total bilirubin and alanine aminotransferase increased significantly. B ?mode ultrasonography showed typical sonographic features of gallbladder mucocele.The image features of DR exam are not typical. According to the results of clinical examination，blood cell examination，biochemical examination，and imaging examination，gallbladder mucocele was diagnosed. After a week of rehydration therapy，anti ? inflammatory medication and liver and gallbladder protectant treatment，the dog recovered. Oral medication was then prescribed. Follow?up visit showed no further conditions.

A case on stubborn nose treated by traditional Chinese veterinary medicine in dogs

JIANG Jiaqi1 ，MI Jie2 ，FAN Yunpeng1 ，LIU Yingqiu1 ，ZHANG Weimin1 ，MA Wuren1，2*

2022, 47(6):  95-96.  DOI: 10.19978/j.cnki.xmsy.2022.06.19

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This paper reported a case of chronic epistaxis and nasal swelling in a 9 ? year ? old female golden retriever，which was successfully cured by syndrome differentiation and treatment with the methods of invigorating qi and regulating blood，removing dampness and resolving phlegm under the guideline of traditional Chinese veterinary theory. It shows that Traditional Chinese veterinary medicine has a good effect in the treatment of intractable epistaxis. The summary and analysis of the case can provide reference for diagnosis and treatment of similar diseases.

A case on diagnosis and treatment of hypertrophic cardiomyopathy in cats

GONG Liwei，SONG Chen，BAI Zhitao，LIN Lin，LIU Yuqing*

2022, 47(6):  97-100.  DOI: 10.19978/j.cnki.xmsy.2022.06.20

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Hypertrophic cardiomyopathy is a cardiac disease with highest incidence rate in cats. It has no obvious symptoms in the early stage and is easily ignored by the owner. Once symptoms appeared，it often has poor prognosis. This paper reports a case of hypertrophic cardiomyopathy in a mix breed cat. With the medical history and results of clinical examination，hematological examination，X ? ray and cardiac ultrasound，hypertrophic cardiomyopathy was diagnosed. After 1 week of comprehensive treatment，which includes oxygen therapy，cardiac load reduction， thrombosis prevention and nutritional support treatment，the cat’s condition was stabilized.