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Nguyen BT, Yim D, Flores RA, Lee SY, Kim WH, Jung SH, Kim S, Min W. Large-Scale Field Trials of an Eimeria Vaccine Induce Positive Effects on the Production Index of Broilers. Vaccines (Basel) 2024; 12:800. [PMID: 39066438 PMCID: PMC11281675 DOI: 10.3390/vaccines12070800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 07/11/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024] Open
Abstract
Live coccidiosis vaccines have mainly been used to reduce Eimeria species infection, which is considered the most economically important disease in the poultry industry. Evaluation data on vaccine effectiveness through large-scale field experiments are lacking, especially in broilers. Thus, the effectiveness of a commercial coccidiosis vaccine was evaluated in approximately 900,000 chicks reared on three open-broiler farms where coccidiosis is prevalent. The vaccine's effectiveness after vaccination of 1-day-old chicks was monitored using three parameters (lesion score, fecal oocyst shedding, and production index, PI) in nine trials performed three times on each farm. Lesion scores were confirmed in three different areas of the intestine because the vaccine contained four Eimeria species. The average lesion scores were 0.36 to 0.64 in the duodenal region, 0.30 to 0.39 in the jejuno-ileal region, and 0.18 to 0.39 in the cecal region. The average fecal oocyst shedding rate ranged from 19,766 to 100,100 oocysts per gram, showing large variations depending on farms and buildings within the farm. Compared with the PI of the previous 9-10 trials on each farm, the PI increased by 2.45 to 23.55. Because of the potential for perturbation of the fecal microbiota by live coccidiosis vaccines, the fecal microbiota was investigated using 16S rRNA microbial profiling. Although the β-diversity was significantly different in distribution and relative abundance among farms (PERMANOVA, pseudo-F = 4.863, p = 0.009), a Kyoto Encyclopedia of Genes and Genomes pathway analysis found no significant bacterial invasion of the epithelial cell pathway across farms. This large-scale field trial of a live Eimeria vaccine indicates that coccidiosis vaccines can have meaningful effects on the poultry industry and could be used as an alternative to the prophylactic use of anticoccidial drugs under field conditions.
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Affiliation(s)
- Binh T. Nguyen
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju 52828, Republic of Korea; (B.T.N.); (R.A.F.); (S.Y.L.); (W.H.K.)
| | - Dongjean Yim
- Hoxbio, Business Center, Gyeongsang National University, Jinju 52828, Republic of Korea;
| | - Rochelle A. Flores
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju 52828, Republic of Korea; (B.T.N.); (R.A.F.); (S.Y.L.); (W.H.K.)
| | - Seung Yun Lee
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju 52828, Republic of Korea; (B.T.N.); (R.A.F.); (S.Y.L.); (W.H.K.)
| | - Woo H. Kim
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju 52828, Republic of Korea; (B.T.N.); (R.A.F.); (S.Y.L.); (W.H.K.)
| | - Seung-Hwan Jung
- MSD Animal Health Korea Ltd., Seoul Square, Jung-gu, Seoul 04637, Republic of Korea; (S.-H.J.); (S.K.)
| | - Sangkyu Kim
- MSD Animal Health Korea Ltd., Seoul Square, Jung-gu, Seoul 04637, Republic of Korea; (S.-H.J.); (S.K.)
| | - Wongi Min
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju 52828, Republic of Korea; (B.T.N.); (R.A.F.); (S.Y.L.); (W.H.K.)
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Ahmad R, Yu YH, Hua KF, Chen WJ, Zaborski D, Dybus A, Hsiao FSH, Cheng YH. Management and control of coccidiosis in poultry - A review. Anim Biosci 2024; 37:1-15. [PMID: 37641827 PMCID: PMC10766461 DOI: 10.5713/ab.23.0189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/13/2023] [Accepted: 08/12/2023] [Indexed: 08/31/2023] Open
Abstract
Poultry coccidiosis is an intestinal infection caused by an intracellular parasitic protozoan of the genus Eimeria. Coccidia-induced gastrointestinal inflammation results in large economic losses, hence finding methods to decrease its prevalence is critical for industry participants and academic researchers. It has been demonstrated that coccidiosis can be effectively controlled and managed by employing anticoccidial chemical compounds. However, as a result of their extensive use, anticoccidial drug resistance in Eimeria species has raised concerns. Phytochemical/herbal medicines (Artemisia annua, Bidens pilosa, and garlic) seem to be a promising strategy for preventing coccidiosis, in accordance with the "anticoccidial chemical-free" standards. The impact of herbal supplements on poultry coccidiosis is based on the reduction of oocyst output by preventing the proliferation and growth of Eimeria species in chicken gastrointestinal tissues and lowering intestinal permeability via increased epithelial turnover. This review provides a thorough up-to-date assessment of the state of the art and technologies in the prevention and treatment of coccidiosis in chickens, including the most used phytochemical medications, their mode of action, and the applicable legal framework in the European Union.
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Affiliation(s)
- Rafiq Ahmad
- Department of Biotechnology and Animal Science, National Ilan University, Yilan 26047,
Taiwan
| | - Yu-Hsiang Yu
- Department of Biotechnology and Animal Science, National Ilan University, Yilan 26047,
Taiwan
| | - Kuo-Feng Hua
- Department of Biotechnology and Animal Science, National Ilan University, Yilan 26047,
Taiwan
| | - Wei-Jung Chen
- Department of Biotechnology and Animal Science, National Ilan University, Yilan 26047,
Taiwan
| | - Daniel Zaborski
- Department of Ruminants Science, West Pomeranian University of Technology, Klemensa Janickiego 29, 71-270 Szczecin,
Poland
| | - Andrzej Dybus
- Department of Genetics, West Pomeranian University of Technology, 70-310 Szczecin,
Poland
| | - Felix Shih-Hsiang Hsiao
- Department of Biotechnology and Animal Science, National Ilan University, Yilan 26047,
Taiwan
| | - Yeong-Hsiang Cheng
- Department of Biotechnology and Animal Science, National Ilan University, Yilan 26047,
Taiwan
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Li M, Lv X, Zheng M, Wei Y. The Immunoprotective Effect of ROP27 Protein of Eimeria tenella. Animals (Basel) 2023; 13:3500. [PMID: 38003119 PMCID: PMC10668730 DOI: 10.3390/ani13223500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/04/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
Eimeria tenella rhoptry protein has the properties of a protective antigen. EtROP27 is a pathogenic gene that is detected via a transcriptome, but its expression pattern, immunogenicity, and potency are unknown. Therefore, a gene segment of EtROP27 was amplified and transplanted into the pET28a prokaryotic vector for the expression of the recombinant protein, and it subsequently purified for the generation of a polyclonal antibody. Then, RT-PCR and Western blotting were performed to understand the expression pattern of EtROP27. Subsequently, animal experiments were conducted to evaluate the immunoprotective effect of the recombinant protein with different immunizing doses (50, 100, and 150 μg). The results showed that the expression of EtROP27 gradually increased with the prolongation of infection time, reaching the highest level at 96 h and then decreasing. Additionally, EtROP27 is a natural antigen of coccidia that can stimulate the body to produce high levels of IgY. As with recombinant protein vaccines, the results of immune protection evaluation tests showed that the average weight gain rates of the immune challenge groups were significantly higher than that of the challenged control group, and their average lesion scores were significantly lower than that of the challenged control group. Furthermore, the oocyst excretion decreased by 81.25%, 86.21%, and 80.01%, and the anticoccidial index was 159.45, 171.47, and 166.75, respectively, for these groups. EtROP27 is a promising antigen gene candidate for the development of a coccidiosis vaccine.
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Affiliation(s)
- Menggang Li
- Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and Technology, Nanning 530004, China;
| | - Xiaoling Lv
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong 030801, China; (X.L.); (M.Z.)
| | - Mingxue Zheng
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong 030801, China; (X.L.); (M.Z.)
| | - Yingyi Wei
- Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and Technology, Nanning 530004, China;
- Guangxi Zhuang Autonomous Region Engineering Research Center of Veterinary Biologics, Nanning 530004, China
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Jobe MC, Mthiyane DMN, Dludla PV, Mazibuko-Mbeje SE, Onwudiwe DC, Mwanza M. Pathological Role of Oxidative Stress in Aflatoxin-Induced Toxicity in Different Experimental Models and Protective Effect of Phytochemicals: A Review. Molecules 2023; 28:5369. [PMID: 37513242 PMCID: PMC10386527 DOI: 10.3390/molecules28145369] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/26/2023] [Accepted: 07/08/2023] [Indexed: 07/30/2023] Open
Abstract
Aflatoxin B1 is a secondary metabolite with a potentially devastating effect in causing liver damage in broiler chickens, and this is mainly facilitated through the generation of oxidative stress and malonaldehyde build-up. In the past few years, significant progress has been made in controlling the invasion of aflatoxins. Phytochemicals are some of the commonly used molecules endowed with potential therapeutic effects to ameliorate aflatoxin, by inhibiting the production of reactive oxygen species and enhancing intracellular antioxidant enzymes. Experimental models involving cell cultures and broiler chickens exposed to aflatoxin or contaminated diet have been used to investigate the ameliorative effects of phytochemicals against aflatoxin toxicity. Electronic databases such as PubMed, Science Direct, and Google Scholar were used to identify relevant data sources. The retrieved information reported on the link between aflatoxin B1-included cytotoxicity and the ameliorative potential/role of phytochemicals in chickens. Importantly, retrieved data showed that phytochemicals may potentially protect against aflatoxin B1-induced cytotoxicity by ameliorating oxidative stress and enhancing intracellular antioxidants. Preclinical data indicate that activation of nuclear factor erythroid 2-related factor 2 (Nrf2), together with its downstream antioxidant genes, may be a potential therapeutic mechanism by which phytochemicals neutralize oxidative stress. This highlights the need for more research to determine whether phytochemicals can be considered a useful therapeutic intervention in controlling mycotoxins to improve broiler health and productivity.
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Affiliation(s)
- Martha Cebile Jobe
- Department of Animal Science, Mahikeng Campus, North-West University, Mmabatho 2735, South Africa
- Food Security and Safety Focus Area, Mahikeng Campus, North-West University, Mmabatho 2735, South Africa
| | - Doctor M N Mthiyane
- Department of Animal Science, Mahikeng Campus, North-West University, Mmabatho 2735, South Africa
- Food Security and Safety Focus Area, Mahikeng Campus, North-West University, Mmabatho 2735, South Africa
| | - Phiwayinkosi V Dludla
- Cochrane South Africa, South African Medical Research Council, Tygerberg 7505, South Africa
- Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa 3886, South Africa
| | | | - Damian C Onwudiwe
- Department of Chemistry, Mahikeng Campus, North-West University, Mmabatho 2735, South Africa
| | - Mulunda Mwanza
- Food Security and Safety Focus Area, Mahikeng Campus, North-West University, Mmabatho 2735, South Africa
- Department of Animal Health, Mahikeng Campus, North-West University, Mmabatho 2735, South Africa
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Saeed Z, Alkheraije KA. Botanicals: A promising approach for controlling cecal coccidiosis in poultry. Front Vet Sci 2023; 10:1157633. [PMID: 37180056 PMCID: PMC10168295 DOI: 10.3389/fvets.2023.1157633] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 03/10/2023] [Indexed: 05/15/2023] Open
Abstract
Avian species have long struggled with the problem of coccidiosis, a disease that affects various parts of the intestine, including the anterior gut, midgut, and hindgut. Among different types of coccidiosis, cecal coccidiosis is particularly dangerous to avian species. Chickens and turkeys are commercial flocks; thus, their parasites have remained critical due to their economic importance. High rates of mortality and morbidity are observed in both chickens and turkeys due to cecal coccidiosis. Coccidiostats and coccidiocidal chemicals have traditionally been added to feed and water to control coccidiosis. However, after the EU banned their use because of issues of resistance and public health, alternative methods are being explored. Vaccines are also being used, but their efficacy and cost-effectiveness remain as challenges. Researchers are attempting to find alternatives, and among the alternatives, botanicals are a promising choice. Botanicals contain multiple active compounds such as phenolics, saponins, terpenes, sulfur compounds, etc., which can kill sporozoites and oocysts and stop the replication of Eimeria. These botanicals are primarily used as anticoccidials due to their antioxidant and immunomodulatory activities. Because of the medicinal properties of botanicals, some commercial products have also been developed. However, further research is needed to confirm their pharmacological effects, mechanisms of action, and methods of concentrated preparation. In this review, an attempt has been made to summarize the plants that have the potential to act as anticoccidials and to explain the mode of action of different compounds found within them.
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Affiliation(s)
- Zohaib Saeed
- Department of Parasitology, University of Agriculture, Faisalabad, Pakistan
| | - Khalid A. Alkheraije
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, Buraidah, Saudi Arabia
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Ghavipanje N, Fathi Nasri MH, Vargas-Bello-Pérez E. An insight into the potential of berberine in animal nutrition: Current knowledge and future perspectives. J Anim Physiol Anim Nutr (Berl) 2022; 107:808-829. [PMID: 36031857 DOI: 10.1111/jpn.13769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/10/2022] [Accepted: 08/06/2022] [Indexed: 11/30/2022]
Abstract
In animal nutrition, the interest for novel feed additives has expanded with elevating industry standards and consumer awareness besides the demand for healthy animal-derived food products. Consumer and animal health are leading concerns dictating the importance of novel animal feed additives. Berberine (BBR) is a natural pentacyclic isoquinoline alkaloid that has exhibited diverse pharmacological properties, including metabolism-regulating, hepatoprotective, and inflammatory alleviative in addition to its antioxidant activity. Despite detailed information on cellular mechanisms associated with BBR therapeutics, and strong clinical evidence, only a few studies have focused on BBR applied to animal nutrition. However, great pieces of evidence have shown that dietary BBR supplementation could result in improved growth performance, enhanced oxido-inflammatory markers, and mitigated metabolic dysfunctions in both monogastric and ruminant animals. The data discussed in the present review may set the basis for further research on BBR in animal diets for developing novel strategies aiming to improve animal health as well as products with beneficial properties for humans.
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Affiliation(s)
- Navid Ghavipanje
- Department of Animal Science, Faculty of Agriculture, University of Birjand, Birjand, Iran
| | | | - Einar Vargas-Bello-Pérez
- Department of Animal Sciences, School of Agriculture, Policy and Development, University of Reading, Reading, UK
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Flores RA, Nguyen BT, Cammayo PLT, Võ TC, Naw H, Kim S, Kim WH, Na BK, Min W. Epidemiological investigation and drug resistance of Eimeria species in Korean chicken farms. BMC Vet Res 2022; 18:277. [PMID: 35836230 PMCID: PMC9284840 DOI: 10.1186/s12917-022-03369-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 06/30/2022] [Indexed: 11/20/2022] Open
Abstract
Background Coccidiosis is a poultry disease that occurs worldwide and is caused by Eimeria species. The infection is associated with reduced feed efficiency, body weight gain, and egg production. This study aimed to investigate the current status of coccidiosis and anticoccidial resistance to anticoccidial drugs used as part of control strategies for this disease in Korean chicken farms. Results An overall prevalence of 75% (291/388) was found. Positive farms contained several Eimeria species (mean = 4.2). Of the positive samples, E. acervulina (98.6%), E. maxima (84.8%), and E. tenella (82.8%) were the most prevalent species. Compared with cage-fed chickens, broilers and native chickens reared in free-range management were more at risk of acquiring an Eimeria infection. Sensitivities to six anticoccidial drugs (clopidol, diclazuril, maduramycin, monensin, salinomycin, and toltrazuril) were tested using nine field samples. Compared with untreated healthy control chickens, the body weight gains of infected chickens and treated/infected chickens were significantly reduced in all groups. Fecal oocyst shedding was significantly reduced in four clopidol-treated/infected groups, three diclazuril-treated/infected groups, two toltrazuril-treated/infected groups, one monensin-treated/infected group, and one salinomycin-treated/infected group, compared with the respective untreated/infected control groups. Intestinal lesion scores were also reduced in three clopidol-treated/infected groups, one monensin-treated/infected group, and one toltrazuril-treated/infected group. However, an overall assessment using the anticoccidial index, percent optimum anticoccidial activity, relative oocyst production, and reduced lesion score index found that all field samples had strong resistance to all tested anticoccidial drugs. Conclusion The results of this large-scale epidemiological investigation and anticoccidial sensitivity testing showed a high prevalence of coccidiosis and the presence of severe drug resistant Eimeria species in the field. These findings will be useful for optimizing the control of coccidiosis in the poultry industry. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-022-03369-3.
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Affiliation(s)
- Rochelle A Flores
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Binh T Nguyen
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Paula Leona T Cammayo
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Tuấn Cường Võ
- Department of Parasitology and Tropical Medicine, Department of Convergence Medical Science, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea
| | - Haung Naw
- Department of Parasitology and Tropical Medicine, Department of Convergence Medical Science, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea
| | - Suk Kim
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Woo H Kim
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Byoung-Kuk Na
- Department of Parasitology and Tropical Medicine, Department of Convergence Medical Science, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea
| | - Wongi Min
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea.
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Yang X, Pan X, Jia Z, Bai B, Zhi W, Chen H, Ma C, Ma D. Oral administration of Lactobacillus brevis 23017 combined with ellagic acid attenuates intestinal inflammatory injury caused by Eimeria infection by activating the Nrf2/HO-1 antioxidant pathway. Vet Res 2022; 53:21. [PMID: 35303923 PMCID: PMC8931975 DOI: 10.1186/s13567-022-01042-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 02/08/2022] [Indexed: 02/07/2023] Open
Abstract
The aim of this study was to investigate whether oral administration of Lactobacillus brevis 23017 (LB) alone and in combination with ellagic acid inhibits ChTLR15/ChNLRP3/ChIL-1β by activating the Nrf2/HO-1 pathway to attenuate intestinal inflammatory injury. Two animal experiments were performed. In Experiment 1, chickens were allocated into 7 groups: PBS, and low, medium and high dosages of live and heat-killed LB, named L/LB(+), M/LB(+) and H/LB(+), and L/LB(-), M/LB(-) and H/LB(-), respectively. In Experiment 2, chickens were divided into 5 groups: PBS, challenge control, and low, medium and high dosages of ellagic acid combined with LB(+), named L/EA + L/LB(+), M/EA + M/LB(+) and H/EA + H/LB(+), respectively. Chickens were gavaged with LB with or without ellagic acid once a day. Then, the mRNA and protein levels of the components of the Nrf2/HO-1 pathway found in the caecal tissues were quantified. On Day 7 post-infection with E. tenella, the levels of the components of the ChTLR15/NLRP3/IL-1β pathway in the caeca were again quantified, and the anticoccidial effects were assessed. The results showed that the levels of the genes in the Nrf2/HO-1 pathway in the chickens in the LB(+) groups were higher than those in the LB(-) groups (p < 0.001); those in the H/LB(+) group were higher than those in the M/LB(+) and L/LB(+) groups (p < 0.001); and those in the H/EA + H/LB(+) group showed the highest expression levels compared with the other groups (p < 0.001). After challenge, the chickens in the H/LB(+) group displayed less inflammatory injury than those in the M/LB(+) and L/LB(+) groups (p < 0.05), and the chickens in the H/EA + H/LB(+) group showed stronger anti-inflammatory effects than the other groups (p < 0.05). Thus, these protective effects against infection were consistent with the above results. Overall, significant anti-inflammatory effects were observed in chickens orally gavaged with high dosages of live L. brevis 23017 and ellagic acid, which occurred by regulation of the ChTLR15/NLRP3/IL-1β pathway.
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Affiliation(s)
- Xuelian Yang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Xinghui Pan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Zhipeng Jia
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Bingrong Bai
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Wenjing Zhi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Hang Chen
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Chunli Ma
- College of Food Science, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China.
| | - Dexing Ma
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China. .,Heilongjiang Key Laboratory for Experimental Animals and Comparative Medicine, Harbin, 150030, Heilongjiang, China.
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