Combined H5ND inactivated vaccine protects chickens against challenge by different clades of highly pathogenic avian influenza viruses subtype H5 and virulent Newcastle disease virus

Research (Published online: 21-01-2019)

14. Combined H5ND inactivated vaccine protects chickens against challenge by different clades of highly pathogenic avian influenza viruses subtype H5 and virulent Newcastle disease virus

Ahmed Ali, Marwa Safwat, Walid H. Kilany, Abdou Nagy, Awad A. Shehata, Mohamed A. Zain El-Abideen, Al-Hussien M. Dahshan and Abdel-Satar A. Arafa

Veterinary World, 12(1): 97-105

Aim: The aim of the current study was to evaluate the efficacy of a trivalent-inactivated oil-emulsion vaccine against challenge by different clades highly pathogenic avian influenza (HPAI) viruses including HPAI-H5N8 and the virulent genotype VII Newcastle disease virus (NDV) (vNDV).

Materials and Methods: The vaccine studied herein is composed of reassortant AI viruses rgA/Chicken/Egypt/ ME1010/2016 (clade 2.2.1.1), H5N1 rgA/Chicken/Egypt/RG-173CAL/2017 (clade 2.2.1.2), and "NDV" (LaSota NDV/ CK/Egypt/11478AF/11); all used at a concentration of 108 EID50/bird and mixed with Montanide-ISA70 oil adjuvant. Two-week-old specific pathogen free (SPF) chickens were immunized subcutaneously with 0.5 ml of the vaccine, and hemagglutination inhibition (HI) antibody titers were monitored weekly. The intranasal challenge was conducted 4 weeks post-vaccination (PV) using 106 EID50/0.1 ml of the different virulent HPAI-H5N1 viruses representing clades 2.2.1, 2.2.1.1, 2.2.1.2, 2.3.4.4b-H5N8, and the vNDV.

Results: The vaccine induced HI antibody titers of >6log2 against both H5N1 and NDV viruses at 2 weeks PV. Clinical protection against all HPAI H5N1 viruses and vNDV was 100%, except for HPAI H5N1 clade-2.2.1 and HPAI H5N8 clade- 2.3.4.4b viruses that showed 93.3% protection. Challenged SPF chickens showed significant decreases in the virus shedding titers up to <3log10 compared to challenge control chickens. No virus shedding was detected 6 "days post-challenge" in all vaccinated challenged groups.

Conclusion: Our results indicate that the trivalent H5ND vaccine provides significant clinical protection against different clades of the HPAI viruses including the newly emerging H5N8 HPAI virus. Availability of such potent multivalent oil-emulsion vaccine offers an effective tool against HPAI control in endemic countries and promises simpler vaccination programs.

Keywords: avian influenza, Egypt, H5N1, H5N8, H5ND, Newcastle diseases virus, trivalent vaccine.

Antibacterial activity and sensory properties of Heracleum persicum essential oil, nisin, and Lactobacillus acidophilus against Listeria monocytogenes in cheese

Research (Published online: 17-01-2019)

13. Antibacterial activity and sensory properties of Heracleum persicum essential oil, nisin, and Lactobacillus acidophilus against Listeria monocytogenes in cheese

A. Ehsani, A. Rezaeiyan, M. Hashemi, M. Aminzare, B. Jannat and A. Afshari

Veterinary World, 12(1): 90-96

ABSTRACT

Aim: The aim of this study was to evaluate the antibacterial and chemical effect of Heracleum persicum essential oil (EO), nisin, Lactobacillus acidophilus, and their combination against Listeria monocytogenes both in vitro and in Iranian white cheese model.

Materials and Methods: Chemical compositions of H. persicum EO were analyzed by gas chromatography-mass spectrometry. After production of Iranian white cheese, minimum inhibitory concentration (MIC) and minimum bactericidal concentration of EO and nisin and agar spot test of L. acidophilus against L. monocytogenes were evaluated.

Results: Hexyl butanoate (25.98%), octyl isobutyrate (17.82%), methyl butyrate (14.37%), and pentyl cyclopropane (12.77%) were the main components of the EO. MIC of the EO against L. monocytogenes was 2.5 mg/mL. Combination of nisin (5.3 IU/mL) and H. persicum EO (2500 μg/mL) showed increasing effect against L. monocytogenes (fractional inhibitory concentration = 0.9), while a higher concentration of EO and nisin showed undesirable effect on the cheese flavor. Furthermore, a combination of 1012 CFU/g L. acidophilus with H. persicum EO at the concentration of 2.5 mg/mL (T12) showed acceptable sensorial and also antibacterial results in Iranian white cheese.

Conclusion: Combination of H. persicum EO, L. acidophilus, and nisin can be recommended as natural preservatives and flavoring agents in cheese.

Keywords: Heracleum persicum, Lactobacillus acidophilus, Listeria monocytogenes, Nisin.

Veterinary World reviewer acknowledgment 2018

Reviewer Acknowledgment (Published online: 16-01-2019)

12. Veterinary World reviewer acknowledgment 2018

A. V. Sherasiya and Nazir

Veterinary World, 12(1): 85-89

Phylogenetic characterization of Salmonella enterica from pig production and humans in Thailand and Laos border provinces

Research (Published online: 16-01-2019)

11. Phylogenetic characterization of Salmonella enterica from pig production and humans in Thailand and Laos border provinces

Rangsiya Prathan, Asinamai Athliamai Bitrus, Nuananong Sinwat, Sunpetch Angkititrakul and Rungtip Chuanchuen

Veterinary World, 12(1): 79-84

ABSTRACT

Background and Aim: The genetic relationship among serotypes of Salmonella enterica from food animals, food of animal origin, and human is of interest as the data could provide an important clue for the source of human infection. This study aimed to determine the genetic relatedness of S. enterica from pig production and human in Thailand-Laos border provinces.

Materials and Methods: A total of 195 S. enterica serotypes isolated from pig and pork (n=178) and human (n=17) including four serotypes (Typhimurium, Rissen, Derby, and Stanley) were randomly selected to examine their genetic relatedness using highly conserved sequence of three genes (fim A, man B, and mdh).

Results: The results showed that 195 Salmonella isolates of four different serotypes were grouped into five different clusters, and members of the same Salmonella serotypes were found in the same cluster. Salmonellaisolated from pig production and human in Thailand-Laos border provinces represented overlapping population and revealed a high degree of similarity, indicating close genetic relationship among the isolates.

Conclusion: The results support that the determination of Salmonella serotyping combined with analysis of phylogenetic tree can be used track the clonal evolution and genetic diversity of Salmonella serotypes in different host species.

Keywords: Laos, pig, Salmonella, Thailand.

The effect of dietary protein levels on body weight gain, carcass production, nitrogen emission, and efficiency of productions related to emissions in thin-tailed lambs

Research (Published online: 15-01-2019)

10. The effect of dietary protein levels on body weight gain, carcass production, nitrogen emission, and efficiency of productions related to emissions in thin-tailed lambs

Ari Prima, Endang Purbowati, Edy Rianto and Agung Purnomoadi

Veterinary World, 12(1): 72-78

ABSTRACT

Aim: This study was aimed to evaluate dietary crude protein (CP) level on performance of body weight (BW) gain, carcass production, and nitrogen emission on lambs.

Materials and Methods: A total of 12 male thin-tailed lambs (15.2±1.8 kg initial BW and aged 3-4 months) were assigned to completely randomized design for 84-day feeding trial. The animals were divided into three different levels of CP (i.e., 14%, 16%, and 18% with isocaloric diets and 60% total digestible nutrients) with four replications.

Results: Increasing CP level was not significantly affected on average daily gain (ADG), carcass production, N and N2O emissions, and efficiency of emissions related to the productions. The average of ADG, carcass production, meat production, meat protein production, N emission, and N2O emission was 141.4 g, 11.6 kg, 6.8 kg, 0.9 kg, 53.1 g/day, and 0.3 g/day, respectively. The efficiency of ADG, carcass production, meat production, and meat protein related to N emissions were 119.7 g/kg, 4.4 g/kg, 2.5 g/kg, and 56.6 g/kg, respectively, while N2O emissions related to ADG, carcass production, meat production, and meat protein were 2.4 g/kg, 0.027 g/kg, 0.36 g/kg, and 0.34 g/kg, respectively.

Conclusion: It can be concluded that the increase of CP level up to 18% did not affect productivity, N emissions, and efficiency of emissions per unit product because the increase of CP was not balanced by energy content in feed.

Keywords: average daily gain, carcass productions, crude protein levels, efficiency emissions to productions, nitrogen emission, nitrous oxide emission.

Detection of coagulase gene in Staphylococcus aureus from several dairy farms in East Java, Indonesia, by polymerase chain reaction

Research (Published online: 10-01-2019)

9. Detection of coagulase gene in Staphylococcus aureus from several dairy farms in East Java, Indonesia, by polymerase chain reaction

Mustofa Helmi Effendi, Mirza Atikah Madarina Hisyam, Poedji Hastutiek and Wiwiek Tyasningsih

Veterinary World, 12(1): 68-71

ABSTRACT

Aim: This study was conducted to study the coagulase (coa) gene-based genetic diversity of Staphylococcus aureus, isolated from different samples of cattle from three different regions in East Java Province, Indonesia.

Materials and Methods: A total of 160 raw milk samples collected in East Java Province, Indonesia, were screened for the presence of S. aureus. The presumptive isolates were confirmed by coa test. The confirmed S. aureus isolates were subjected to coa gene polymerase chain reaction.

Results: Of 160 different samples, 20 (12.5%) isolates of S. aureus were confirmed by positive coa test. Of 20 S. aureus isolates, 19 (95%) isolates carried coa gene. Six different genotypes of coa gene, i.e., 440 bp, 510 bp, 547 bp, 680 bp, 740 bp, and 820 bp were obtained. One coa genotypes, 510 bp (10 isolates) were observed in polymorphism to be more prevalent than the others, and the genotype was present in at least one isolates from every region.

Conclusion: It can be concluded that coa gene is easily epidemiological tool for detection of variation strain from S. aureus.

Keywords: coagulase gene, coagulase test, polymorphism, raw milk, Staphylococcus aureus.

Tadpole serum activity (Rana catesbeiana) in caspase-3 as a marker of the role of apoptosis and total cytotoxic T lymphocytes in albino rats' epithelial cells induced by neoplasia

Research (Published online: 10-01-2019)

8. Tadpole serum activity (Rana catesbeiana) in caspase-3 as a marker of the role of apoptosis and total cytotoxic T lymphocytes in albino rats' epithelial cells induced by neoplasia

M. T. E. Purnama, I. H. Rahmaningtyas, A. R. Pratama, Z. Prastika, A. M. Kartikasari and N. P. D. Cahyo

Veterinary World, 12(1): 63-67

ABSTRACT

Aim: This study was conducted to examine the tadpole's serum activity (Rana catesbeiana) in caspase-3 as a marker of the role of apoptosis and total cytotoxic T lymphocyte (CTL) in albino rats' epithelial cells induced by neoplasia. Tadpole serumcontains thyroxine hormone that may cause the metamorphosis process and control cell proliferation.

Materials and Methods: Male rats were induced by 7,12-dimethylbenz (α)anthracene (DMBA) 20 mg/rats twice every week over 5 weeks to stimulate skin neoplasia. Tadpole serum injected intracutaneously after neoplasia is known. The negative control group (C−) was not exposed to DMBA and tadpole serum, while the positive control group (C+) was exposed to DMBA. Treatment groups (T1, T2, and T3) were exposed DMBA and tadpole serum 100%, 75%, and 25%/rat/ day, respectively. Samples of skin organ were be made preparations immunohistochemistry interacted with caspase-3 and CTL antibody as the marker.

Results: Based on the result, immunohistochemistry from skin neoplasia and given therapy of tadpole serum show that Treatment 1 was the highest caspase-3 and CTL expression. The result of caspase-3 expression in C−, C+, T1, T2, and T3 was 0.00c±0.000, 0.70bc±0.141, 2.00a±0.283, 1.10b±0.424, and 1.15b±0.495, respectively. The result of CTL expression in C−, C+, T1, T2, and T3 was 0.10d±0.200, 1.00c±0.230, 2.10a±0.529, 1.70ab±0.258, and 1.35bc±0.443, respectively.

Conclusion: It can be concluded from the study that tadpole serum (R. catesbeiana) 100% concentration can increase caspase-3 and total CTL in albino rats' epithelial cells induced by neoplasia.

Keywords: caspase-3, cytotoxic T lymphocyte, Rana catesbeiana, serum, tadpoles.