This study aimed to investigate the effects of early-life supplementation with Lactiplantibacillus plantarum LPJZ-658 on the growth performance and gut microbiota of newborn piglets. Twelve one-day-old suckling piglets were randomly divided into two groups: the control group (C) was orally administered saline and the LPJZ-658 group (LP) was gavaged with 1.0 × 1010 cfu LPJZ-658. The supplementation was carried out once daily for 28 days. Fresh fecal samples were collected at 7 and 28 days, respectively. The microbiota composition (16S rRNA gene amplicon sequencing) and its predicted functions (PICRUSt2) were analyzed. The body weight and average daily weight gain were significantly increased in the LP group. Statistically significant differences were observed in bacterial diversity and composition of the gut microbial community between the C and LP groups. The predominant bacterial phylum in the piglets changed from Firmicutes, Bacteroidetes, and Proteobacteria at day 7 to Firmicutes, Bacteroidetes, and Spirochaetota at day 28 in both the C group and LP group. We found that LPJZ-658 supplementation suppressed a significant decrease in the relative abundance of Bacteroidota in suckling piglets at 28 days. At the genus level, LPJZ-658 reduced the relative abundance of pathogenic genera such as Clostridium sensu stricto 1, and increased the relative abundance of beneficial genera such as Ruminococcus, Christensenellaceae_R-7_group, Turicibacter, and UCG-002. KEGG metabolic pathway analysis showed that LPJZ-658 may improve amino acid metabolism by regulating the intestinal microbiota of suckling piglets. In summary, the early-life LPJZ-658 interventions significantly improve the growth performance of suckling piglets by the modulation of the gut microbiota.

Antibiotic-resistant Staphylococcus aureus (S. aureus) has severely threatened public health, colonizing approximately 20% of the human population. Thus, targeting S. aureus virulence factors appears to be a promising strategy for infection control. In this study, DP treatment significantly reduced sortase activity, inhibiting S. aureus adhesion and invasion. Computational biology and site-directed mutagenesis confirmed that DP bound to sortase via P30 and T105 residues, which occupied the active center of sortase and inhibited its activity. Additionally, treatment with DP significantly reduced the mortality rate of S. aureus-infected mice and reduced pathological damage to their lungs. Our findings may provide a new agent for developing anti-virulence agents against S. aureus, specifically MRSA infection.

This study investigates the effects of dietary supplementation with Lactiplantibacillus plantarum LP18 on growth performance, immune function, gut microbiota, and serum metabolomics in Luhua chicks, as well as their resistance to Salmonella typhimurium (S. typhimurium) infection. Explore the feasibility of LP18 as an alternative to antibiotic growth promoters. Two hundred one-day-old Luhua chicks were randomly divided into four groups: Control group (Control), S. typhimurium-infection group (Sty), LP18 pretreatment group (LP18), and LP18 pretreatment + S. typhimurium infection group (LP18+Sty). The Control and Sty groups were fed a basal diet. The LP18 and LP18+Sty groups were pretreated with 1 × 10⁹ CFU/g of LP18 for 28 days. Subsequently, the Sty and LP18+Sty groups were subjected to continuous S. typhimurium infection for 3 days and euthanized 4 days post-infection. The results demonstrated that LP18 pretreatment increased the average daily gain while reducing the feed conversion ratio of Luhua chicks (P < 0.05). The LP18 pretreatment increased the thymus (P < 0.05) and spleen indices (P < 0.05), as well as serum concentrations of IgA (P < 0.05) and IgG (P < 0.05). Microbiota analysis revealed that LP18 pretreatment modulated the diversity and composition of cecal microflora. Serum untargeted metabolomics revealed 16 significantly differential metabolites between the Control and LP18 groups, which were enriched in arachidonic acid metabolism, terpenoid backbone biosynthesis, and the citrate cycle. Significant correlations were observed between these serum differential metabolites and cecal differential phyla. Furthermore, compared to the Sty group, the LP18+Sty group attenuated S. typhimurium infection-induced pathological lesions in the liver and spleen, along with decreased diarrhea rate (P < 0.001), as well as reduced S. typhimurium colonization in the liver (P < 0.001), heart (P < 0.001), spleen (P < 0.05), and cecum content (P < 0.05). In summary, the study demonstrates that early intervention with LP18 significantly enhances growth performance and immune function in Luhua chicks, improves gut microbiota, modulates serum metabolic profiles, and increases resistance against S. typhimurium infection.

BACKGROUND:Acinetobacter lwoffii (A. lwoffii) is a Gram-negative bacteria common in the environment, and it is the normal flora in human respiratory and digestive tracts. The bacteria is a zoonotic and opportunistic pathogen that causes various infections, including nosocomial infections. The aim of this study was to identify A. lwoffii strains isolated from bovine milk with subclinical mastitis in China and get a better understanding of its antimicrobial susceptibility and resistance profile. This is the first study to analyze the drug resistance spectrum and corresponding mechanisms of A. lwoffii isolated in raw milk. RESULTS:Four A. lwoffii strains were isolated by PCR method. Genetic evolution analysis using the neighbor-joining method showed that the four strains had a high homology with Acinetobacter lwoffii. The strains were resistant to several antibiotics and carried 17 drug-resistance genes across them. Specifically, among 23 antibiotics, the strains were completely susceptible to 6 antibiotics, including doxycycline, erythromycin, polymyxin, clindamycin, imipenem, and meropenem. In addition, the strains showed variable resistance patterns. A total of 17 resistance genes, including plasmid-mediated resistance genes, were detected across the four strains. These genes mediated resistance to 5 classes of antimicrobials, including beta-lactam, aminoglycosides, fluoroquinolones, tetracycline, sulfonamides, and chloramphenicol. CONCLUSION:These findings indicated that multi-drug resistant Acinetobacter lwoffii strains exist in raw milk of bovine with subclinical mastitis. Acinetobacter lwoffii are widespread in natural environmental samples, including water, soil, bathtub, soap box, skin, pharynx, conjunctiva, saliva, gastrointestinal tract, and vaginal secretions. The strains carry resistance genes in mobile genetic elements to enhance the spread of these genes. Therefore, more attention should be paid to epidemiological surveillance and drug resistant A. lwoffii.

Klebsiella pneumoniae is a zoonotic opportunistic pathogen, and also one of the common pathogenic bacteria causing mink pneumonia. The aim of this study was to get a better understanding of the whole-genome of multi-drug resistant Klebsiella pneumoniae with K2 serotype in China. This study for the first time to analyze Gene Ontology (GO) enrichment, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment, resistance and virulence genes of Klebsiella pneumoniae in mink. The isolate was Klebsiella pneumoniae with serotype K2 and ST6189 by PCR method. The string test was positive and showed high mucus phenotype. There was one plasmid with IncFIB replicons in the genome. The virulence factors including capsule, lipopolysaccharide, adhesin, iron uptake system, urease, secretory system, regulatory gene (rcsA, rcsB), determinants of pili adhesion, enolase and magnesium ion absorption related genes. The strain was multi-drug resistant. A total of 26 resistance genes, including beta-lactam, aminoglycosides, tetracycline, fluoroquinolones, sulfonamides, amide alcohols, macrolides, rifampicin, fosfomycin, vancomycin, diaminopyrimidines and polymyxin. Multidrug-resistant efflux protein AcrA, AcrB, TolC, were predicted in the strain. It was the first to identify that serotype K2 K. pneumonia with ST6189 isolated from mink in China. The finding indicated that hypervirulent and multi-drug resistant K. pneumoniae was exist in Chinese mink. The whole-genome of K. pneumoniae isolates have importance in mink farming practice.

Objectives: Klebsiella pneumoniae is a major opportunistic pathogen that is a member of the Enterobacteriaceae. Klebsiella pneumoniae causes pneumonia in mink and has become the primary infectious disease that limits mink farming. In this study, we report the draft genome sequence of a multidrug-resistant (MDR) strain of K. pneumoniae that harbours the mcr-1 gene isolated from a mink in China. Methods: The agar microdilution method was used to determine the minimum inhibitory concentration of the strain. The entire genomic DNA was sequenced using an Illumina MiSeq platform. A multilocus sequence type (MLST) and a core genome SNP phylogenetic tree analysis with a heatmap of the resistance genes and virulence genes were performed. Results: The size of the genome was 5451.826 kb, and it included one chromosome and one plasmid. The draft genome of K. pneumoniae indicated that the isolate was a member of MLST 661. Four types of virulence genes were detected. The results of antimicrobial susceptibility testing showed multiple drug resistance, and 17 resistance genes were identified. Conclusion: The genome sequence reported in this study will help to reveal the key role of antibiotic resistance and pathogenic mechanisms. It will provide useful information for the role of mobile genetic elements in the adaptive translocation and spread of antimicrobial resistance. (c) 2024 The Author(s). Published by Elsevier Ltd on behalf of International Society for Antimicrobial Chemotherapy. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ )

Globally, metabolic dysfunction-associated steatotic liver disease (MASLD), previously termed nonalcoholic fatty liver disease (NAFLD), is one of the most common liver disorders and is strongly associated with copper deficiency. To explore the potential effects and mechanisms of Lactiplantibacillus plantarum LPJZ-658, copper deficiency combined with a high-sugar diet-induced MASLD mouse model was utilized in this study. We fed 40-week-old (middle-aged) male C57BL/6 mice a copper-deficient and high-sugar diet for 16 weeks (CuDS), with supplementary LPJZ-658 for the last 6 weeks (CuDS + LPJZ-658). In this study, we measured body weight, liver weight, and serum biochemical markers. Lipid accumulation, histology, lipidomics, and sphingolipid metabolism-related enzyme expression were investigated to analyze liver function. Untargeted metabolomics was used to analyze the serum and the composition and abundance of intestinal flora. In addition, the correlation between differential liver lipid profiles, serum metabolites, and gut flora at the genus level was measured. The results show that LPJZ-658 significantly improves abnormal liver function and hepatic steatosis. The lipidomics analyses and metabolic pathway analysis identified sphingolipid, retinol, and glycerophospholipid metabolism as the most relevant metabolic pathways that characterized liver lipid dysregulation in the CuDS group. Consistently, RT-qPCR analyses revealed that the enzymes catalyzing sphingolipid metabolism that were significantly upregulated in the CuDS group were downregulated by the LPJZ-658 treatment. In addition, the serum metabolomics results indicated that the linoleic acid, taurine and hypotaurine, and ascorbate and aldarate metabolism pathways were associated with CuDS-induced MASLD. Notably, we found that treatment with LPJZ-658 partially reversed the changes in the differential serum metabolites. Finally, LPJZ-658 effectively regulated intestinal flora abnormalities and was significantly correlated with differential hepatic lipid species and serum metabolites. In conclusion, we elucidated the function and potential mechanisms of LPJZ-658 in alleviating copper deficiency combined with sugar-induced middle-aged MASLD and hope this will provide possible treatment strategies for improving MASLD.

Animal pathology is an important discipline in the field of veterinary medicine. It involves the study of diseases affecting animals and their causes, symptoms, diagnosis, and treatment. The reform of animal pathology teaching in applied universities is an important aspect that needs to be explored and studied to improve the quality of student education. The current teaching methods used in animal pathology may not be sufficient to meet the needs of students. Therefore, it is necessary to carry out reforms to ensure that students gain comprehensive knowledge about animal diseases. The exploration and research of teaching reform can help identify areas for improvement, such as curriculum development, teaching strategies, and evaluation methods. Using technology in the teaching of animal pathology can provide students with an interactive learning experience, thereby improving learning outcomes. There are practical problems and current situations in applied universities, such as unclear teaching objectives, unclear teaching paths, and lack of teaching practice. Based on this, this article first analyzes the current teaching situation of animal pathology courses in applied universities, then studies the teaching mode of animal pathology in applied universities from the perspective of computer technology, and finally proposes teaching reform strategies for applied animal pathology. In addition, combining practical courses such as laboratory experiments can help students apply theoretical knowledge to practice. In short, exploring and researching the teaching reform of animal pathology is crucial to improving the quality of education for veterinary students. This will ensure that they gain comprehensive knowledge of animal diseases and effectively address them in their future veterinary careers.

Ulcerative colitis (UC) is a chronic and recurrent inflammatory disease of the gastrointestinal tract. This study aimed to determine the effect of cathelicidin-related antimicrobial peptide (Cramp) on dextran sulfate sodium (DSS)-induced acute experimental colitis in mice and to investigate the underlying mechanisms. Acute UC was induced in C57BL/6 mice with 3% DSS for 7 days, 4 mg/kg b.w. synthetic Cramp peptide was administrated once daily starting on day 4 of the experimental period. Mice were evaluated for body weight, colon length, colon histopathology, and inflammatory cytokines in colon tissue. Using 16 s rRNA sequencing, the composition structure of gut microbiota was characterized. Metabolomic profiling of the serum was performed. The results showed that DSS treatment significantly induced intestinal damage as reflected by disease activity index, histopathological features, and colon length, while Cramp treatment significantly prevented these trends. Meanwhile, Cramp treatment decreased the levels of inflammatory cytokines in both serum and colonic tissue on DSS-induced colitis. It was also observed that DSS damaged the integrity of the intestinal epithelial barrier, whereas Cramp also played a protective role by attenuating these deteriorated effects. Furthermore, Cramp treatment reversed the oxidative stress by increasing the antioxidant enzymes of GSH-PX and decreasing the oxidant content of MDA. Notably, compared to the DSS group, Cramp treatment significantly elevated the abundance of Verrucomicrobiota at the phylum level. Furthermore, at the genus level, Parasutterella and Mucispirllum abundance was increased significantly in response to Cramp treatment, although Roseburia and Enterorhabdus reduced remarkably. Metabolic pathway analysis of serum metabolomics showed that Cramp intervention can regulate various metabolic pathways such as α-linolenic acid, taurine and hypotaurine, sphingolipid, and arachidonic acid metabolism. The study concluded that Cramp significantly ameliorated DSS-induced colonic injury, colonic inflammation, and intestinal barrier dysfunction in mice. The underlying mechanism is closely related to the metabolic alterations derived from gut microbiota.

This study aims to systematically evaluate the safety of a novel L. plantarum LPJZ-658 explored on whole-genome sequence analysis, safety, and probiotic properties assessment. Whole genome sequencing results demonstrated that L. plantarum LPJZ-658 consists of 3.26 Mbp with a GC content of 44.83%. A total of 3254 putative ORFs were identified. Of note, a putative bile saline hydrolase (BSH) (identity 70.4%) was found in its genome. In addition, the secondary metabolites were analyzed, and one secondary metabolite gene cluster was predicted to consist of 51 genes, which verified its safety and probiotic properties at the genome level. Additionally, L. plantarum LPJZ-658 exhibited non-toxic and non-hemolytic activity and was susceptible to various tested antibiotics, indicating that L. plantarum LPJZ-658 was safe for consumption. Moreover, the probiotic properties tests confirm that L. plantarum LPJZ-658 also exhibits tolerance to acid and bile salts, preferably hydrophobicity and auto-aggregation, and excellent antimicrobial activity against both Gram-positive and Gram-negative gastrointestinal pathogens. In conclusion, this study confirmed the safety and probiotic properties of L. plantarum LPJZ-658, suggesting it can be used as a potential probiotic candidate for human and animal applications.

Probiotics gained significant attention for their potential to improve gut health and enhance productivity in animals, including poultry. This comprehensive study focused on the genetic analysis of Lactiplantibacillus plantarum 18 (LP18) to understand its survival and colonization characteristics in the gastrointestinal tract. LP18 was supplemented in the late-stage diet of laying hens to investigate its impact on growth performance, egg quality, and lipid metabolism. The complete genome sequence of LP18 was determined, consisting of 3,275,044 base pairs with a GC content of 44.42% and two circular plasmids. Genomic analysis revealed genes associated with adaptability, adhesion, and gastrointestinal safety. LP18 supplementation significantly improved the daily laying rate (p < 0.05) during the late-production phase and showed noteworthy advancements in egg quality, including egg shape index (p < 0.05), egg albumen height (p < 0.01), Haugh unit (p < 0.01), and eggshell strength (p < 0.05), with notable improvements in eggshell ultrastructure. Additionally, LP18 supplementation resulted in a significant reduction in serum lipid content, including LDL (p < 0.01), FFA (p < 0.05), and Gly (p < 0.05). These findings provide valuable insights into the genomic characteristics of LP18 and the genes that support its survival and colonization in the gastrointestinal tract. Importantly, this study highlights the potential of LP18 as a probiotic candidate to enhance productivity, optimize egg quality, and modulate lipid metabolism in poultry production.

Toward the late phase of laying, the production performance of laying hens decreases, egg quality deteriorates, lipid metabolism weakens, and hepatic lipid accumulation is exacerbated. Probiotics as an alternative to antimicrobials have been employed in poultry-related industries. Lactobacillus rhamnosus GG (LGG) is currently the most researched and clinically validated probiotic, showing promising effects in multiple application areas. However, few studies have been conducted on livestock (including poultry) production. Compared with the CON group, the feed conversion ratio (P < 0.01) declined significantly in the LGG group. Eggshell strength (P < 0.001) and eggshell thickness (P < 0.001) were significantly increased by supplementation with LGG in the diet. The height (P < 0.001) and proportion (P < 0.05) of the effective layer and the mammillary knob density (P < 0.01) in the eggshell ultrastructure of the LGG group increased significantly, while the mammillary layer (P < 0.05) and knob width (P < 0.01) decreased significantly. The LGG-treated hens had significantly lower serum concentrations of low-density lipoprotein (P < 0.05), free fatty acids (P < 0.01), and liver triglyceride (P < 0.05) levels than those in the CON group. LGG supplementation significantly decreases the feed conversion ratio, improves eggshell quality by altering the ultrastructure, and improves lipid metabolism in the late laying period.

Fibroblast growth factor 21 (FGF21) is a glucose and lipid metabolic regulator. Recent research revealed that FGF21 was also induced by inflammatory stimuli. Its role in inflammatory bowel disease (IBD) has not been investigated. In this study, an experimental IBD model was established in FGF21 knockout (KO) and wild-type (WT) mice by adding 2.5% (wt/vol) dextran sodium sulfate (DSS) to their drinking water for 7 days. The severity of the colitis and the inflammation of the mouse colon tissues were analyzed. In WT mice, acute DSS treatment induced an elevation in plasma FGF21 and a significant loss of body weight in a time-dependent manner. Surprisingly, the loss of body weight and the severity of the colitis induced by DSS treatment in WT mice were significantly attenuated in FGF21 KO mice. Colon and circulating pro-inflammatory factors were significantly lower in the FGF21 KO mice compared to the WT mice. As shown by BrdU staining, the FGF21 KO mice demonstrated increased colonic epithelial cell proliferation. DSS treatment reduced intestinal Paneth cell and goblet cell numbers in the WT mice, and this effect was attenuated in the FGF21 KO mice. Mechanistically, FGF21 deficiency significantly increased the signal transducer and activator of transcription (STAT)-3 activation in intestinal epithelial cells and increased the expression of IL-22. Further study showed that the expression of suppressor of cytokine signaling-2/3 (SOCS 2/3), a known feedback inhibitor of STAT3, was significantly inhibited in the DSS-treated FGF2 KO mice compared to the WT mice. We conclude that FGF21 deficiency attenuated the severity of DSS-induced acute colitis, which is likely mediated by enhancing the activation of the IL-22-STAT3 signaling pathway in intestinal epithelial cells.

Non-alcoholic steatohepatitis (NASH) is one of the most prevalent diseases worldwide; it is characterized by hepatic lipid accumulation, inflammation, and progressive fibrosis. Here, a Western diet combined with low-dose weekly carbon tetrachloride was fed to C57BL/6J mice for 12 weeks to build a NASH model to investigate the attenuating effects and possible mechanisms of Lactiplantibacillus plantarum LPJZ-658. Hepatic pathology, lipid profiles, and gene expression were assessed. The metabolomic profiling of the serum was performed. The composition structure of gut microbiota was profiled using 16s rRNA sequencing. The results show that LPJZ-658 treatment significantly attenuated liver injury, steatosis, fibrosis, and inflammation in NASH mice. Metabolic pathway analysis revealed that several pathways, such as purine metabolism, glycerophospholipid metabolism, linoleic acid metabolism, and primary bile acid biosynthesis, were associated with NASH. Notably, we found that treatment with LPJZ-658 regulated the levels of bile acids (BAs) in the serum. Moreover, LPJZ-658 restored NASH-induced gut microbiota dysbiosis. The correlation analysis deduced obvious interactions between BAs and gut microbiota. The current study indicates that LPJZ-658 supplementation protects against NASH progression, which is accompanied by alternating BA metabolic and modulating gut microbiota.

This study aimed to investigate the effects of L. plantarum LPJZ-658 on the production, meat quality, intestinal morphology, and cecal microbiota of broilers. White-feathered broilers (1 day old, n = 600) were randomly assigned to two groups and raised for six weeks. The individuals in the LPJZ-658 group were supplemented with 2.6 × 109 cfu/g LPJZ-658. The growth performance, meat quality, intestinal epithelium morphology, and cecal microbiota were observed. The results showed that the average daily gain, average daily feed intake, and feed conversion ratio of broilers in the LPJZ-658 group were significantly improved. In addition, the LPJZ-658 groups had a higher thigh muscle (TM) yield, TM color, TMpH24h, breast muscle (BM) pH24h, and BM color24h, while the BM cooking loss was significantly lower than the CON group. Moreover, supplementation with LPJZ-658 increased ileum and cecum length, duodenum and ileum villus height, and ileum villus height/crypt depth ratio. Furthermore, 16S rRNA sequencing revealed the dietary LPJZ-658 supplementation modulated the diversity and composition of cecal microflora. At the phylum level, the relative abundances of Proteobacteria, Actinobacteria, Verrucomicrobiota, and Acidobacteriota were significantly higher. In addition, LPJZ-658 substantially decreased the genus relative abundances of Streptococcus, Veillonella, Neisseria, and Haemophilus compared with the CON group and facilitated the growth and colonization of beneficial cecal bacteria, such as OBacteroides, Phascolarctobacterium, Bacillus, and Akkermansia. It was concluded that LPJZ-658 supplementation significantly increased growth production, improved meat quality and intestinal status, and modulated the intestinal microbiota in the broilers.

针对猪圆环病毒-Ⅱ型(porcine circovirus type Ⅱ,PCV-Ⅱ)、猪瘟病毒(swine fever virus,CSFV)和猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus,PRRSV)的保守区域设计用 于构建荧光定量PCR体系的引物和探针.以构建的重组质粒标准品为模板建立三重荧光定量PCR体系,并对三重荧光定量PCR体系进行优化和特异性检测、灵敏性检测、重复性试验、标准曲线制作.最后利用构建的三重荧光定量PCR体系和普通PCR体系同时进行临床检测,并对两者的检测结果进行对比.结果显示,3种病毒在单重和三重荧光定量PCR体系中均无非特异性扩增;3种病毒在单重和三重荧光定量PCR体系中的灵敏度均可达到10拷贝/μL;单重和三重荧光定量PCR体系组内和组间重复性变异系数均在5％以内;单重和三重荧光定量PCR在稀释度范围内呈现良好的线性关系.应用本研究构建的三重荧光定量PCR体系对106份临床组织样品进行检测,其中PCV-Ⅱ阳性检出率为74.5％,CSFV阳性检出率为34.9％,PRRSV阳性检出率为18.9％,普通PCR检测中PCV-Ⅱ阳性检出率为37.7％,CSFV阳性检出率为16.9％,PRRSV阳性检出率为7.5％.

针对猪细小(PPV)、猪伪狂犬(PRV)和猪繁殖与呼吸综合征(PRRSV)病毒的保守区域设计用于构建荧光定量PCR体系的引物和探针.以构建的重组质粒标准品为模板建立三重荧光定量PCR体系,并对三重荧光定量PCR体系进行优化并进行特异性、灵敏性、重复性等试验.最后利用构建的三重荧光定量PCR体系和普通PCR体系分别检测病料以进行比较.结果表明:三种病毒在单重和三重荧光定量PCR体系中均无非特异性扩增;三种病毒在单重和三重荧光定量PCR体系中的灵敏度均可达到10 copies/μL;单重和三重荧光定量PCR体系组内和组间重复性变异系数均在5％以内;单重和三重荧光定量PCR在稀释度范围内呈现良好的线性关系.应用本研究构建的三重荧光定量PCR体系对164份临床组织样品进行检测,其中PPV阳性检出率为16.7％,PRV阳性检出率为10％,PRRSV阳性检出率为18.9％;普通PCR检测中PPV阳性检出率为6.5％,PRV阳性检出率为3.6％,PRRSV阳性检出率为7.5％.说明本研究建立的PPV、PRV和PRRSV三重荧光定量PCR检测方法符合临床检测要求并且比普通PCR方法更敏感、更特异.

The current practical teaching of pet disease diagnosis and treatment tech curriculum has some outstanding problems, such as insufficient practical resources, insufficient operating materials, and disconnection from social practice demand. It is necessary to release the value of practical teaching by fully using the advantages of Internet info teaching methods. On account of this, this paper first analyses the concept and value of the Internet info curriculum practice teaching, then studies the practical design of pet disease diagnosis and treatment tech curriculum on account of the Internet, and finally gives the practical teaching strategy of pet disease diagnosis and treatment tech curriculum on account of the Internet.

立德树人是高校落实根本任务,课程思政是重要抓手,要通过发挥课程作为意识形态教育主渠道作用来巩固高校意识形态阵地.课程思政通过充分发挥课堂教学主渠道作用,在专业课程的学习中让学生潜移默化地接受思想政治教育,把知识传授、能力培养与价值塑造相统一,实现德育与智育相统一,推动实现全员、全过程、全方位育人.以《动物解剖学与组织胚胎学》课程为例,分析如何通过挖掘专业课程所蕴含的思政元素,实现课程思政的教学理念;最后对课程思政的实践路径进行了探讨.本文从应用型本科大学一流本科课程建设的定位,以立德树人为根本,以价值塑造为引领,通过多元化手段,在对学生培养过程中实现课程思政与专业知识相融通,学生思想政治工作与校园文化相结合,课堂教学与课外素质拓展平台相结合,构建了特色鲜明的全员育人、全过程育人、全方位育人的"三全育人"课程体系和创新实践平台.

《动物药理学》课程是五年制动物医学专业的一门专业核心课,也是一门实践性较强的基础学科,是疾病治疗的基础和保障,通过理论课的学习,可以掌握各种药物的作用与应用、禁忌等;将《动物药理学》的内容与学生感兴趣的相关的常见疾病结合起来,使学生能够扩大知识面并联系实际建立起完整的理论知识体系.通过实验课的学习,观察动物用药后的反应,并且掌握临床病例处方的开写及药物的配制,在验证、巩固和加深课堂所学的基础理论知识的同时,也提高实验操作与常用仪器设备的使用,从而培养学生具有独立观察、思考、分析和解决问题的能力,养成严肃认真、实事求是和科学严谨的学习态度,为今后从事教学、科研及开发等工作奠定基础.《动物药理学》为学生拓宽知识面和提高其适应能力奠定坚实的理论基础,能运用所学的基本知识来分析解决生产实践中存在的问题,用理论指导实践,从而培养学生实践动手能力和独立操作能力,为生产一线培养应用型和技能型人才.