SVU-International Journal of Veterinary Sciences <p>SVU-IJVS is a peer-reviewed international open access official Veterinary Journal of the South Valley University, Egypt and&nbsp;publishes original research articles dealing with Veterinary sciences.</p> South Valley University en-US SVU-International Journal of Veterinary Sciences 2535-1826 <p>Copyright for articles published in the SVU-IJVS is retained by the authors, with first publication right granted to the SVU-IJVS. By Virtue of their appearance in the SVU-IJVS, articles are free to use after initial&nbsp;publication under <a href="" rel="license">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License&nbsp;&nbsp;</a><span class="cc-license-identifier">(CC BY-NC-SA 4.0)</span></p> <p>&nbsp;</p> Detection of Multi-Drug Resistant Food-borne Bacteria In Ready-to-Eat Meat Products In Luxor City, Egypt <p>A total of 5 <em>E. coli</em> and 8<em> Salmonella</em> serovars were recovered from different meat samples obtained from ready-to-eat meat sandwiches from different street vendors in Luxor city. Characterization of the isolates was performed by biochemical and serological tests, antimicrobial susceptibility assays, detection of virulence and antibiotic resistance genes by multiplex PCR. <em>stx1, stx2,</em> and <em>eaeA</em> genes were detected in O111:H4 serovar, while the presence of <em>stx2, eaA</em> genes in O55:H7 serovar. Also, O26: H11 serovar was positive for both <em>Stx1</em>and <em>eaeA</em>, and O125:H21 serovare contain the only <em>Stx1</em> gene. <em>inv</em>A<em>, hil </em>A and <em>stn genes </em>were detected in <em>S.</em><em> enteritidis, S.</em> <em>typhimurium,</em> and <em>S. virchow</em>. while the presence of <em>inv</em>A and <em>hil</em>A genes in <em>S. malade</em>, also <em>inv</em>A and <em>stn</em> were positive in other isolates of <em>S. enteritidis</em> and <em>S. infantis</em>. &nbsp;<em>E. coli</em> isolates were multi-resistant against most tetracycline antibiotics. while <em>Salmonella</em> isolates were multi-resistant against most of <em>B</em>-lactams antibiotics. Our results indicate the need for applying hygienic practices in food outlets, especially in street vendors, to protect the consumer by reducing the incidence of food-borne diseases, to prevent future food-borne outbreaks.</p> Rania Ibrahim Younis Soad A. Nasef Wesam Mohamed Ali Salem ##submission.copyrightStatement## 2018-12-12 2018-12-12 xxx xxx 10.1234/svu.v2i1.46 A study on Calf’s Behavior and Growth Performance in Relation to Gestation Period and Lactation Season <p>The present study aimed to assess the impact of the length of the gestation period (GPL) and a number of lactation season of cows on behavior and growth performance in calves from birth until weaning. The presence of abnormal behavior during 1<sup>st </sup>twelve hours of the calf's life as delayed Sternal recumbency and standing or abnormal suckling was not significantly affected by GPL. Also, the duration and frequency of behavior related to respiratory, digestive or mixed disorders had a non-significant variation between groups of different gestation period length. However, the increase in GPL had the lowest percentage and duration of behavior related to respiratory and digestive disorders. Calves with the longest GPL had a significantly higher birth weight and it had a significant effect on pre-weaning growth rate. On the other side, the presence of abnormal behavior during the first twelve hours of the calf's life as delayed Sternal recumbency and standing or abnormal suckling were higher in 3<sup>rd</sup> parity. The number of lactation season had no significant effect on the duration and frequency of behavior related to respiratory, digestive or mixed disorders. The birth weight of calves was higher in the third parity group (36.73 kg) than other parities, but the differences didn't reach the significance, moreover, the weaning age and pre-weaning growth rate did not affect by the lactation season number. There was a negative correlation between abnormal behavior and the pre-weaning growth rate. There was a positive correlation between duration of abnormal behavior and the weaning age.</p> <p>&nbsp;</p> Hesham Hosny Mohammed Mohamed Y. Ibrahim Al-Sadik K. Saleem Azhar Fakhry Ibrahim Youniss ##submission.copyrightStatement## 2018-11-22 2018-11-22 60 86 10.1234/svu.v1i2.41 Assessment of The role of Light in Welfare of Layers. <p>Due to the difference in spectral sensitivity between poultry and human, there was an importance to identify the optimal light environment for the health, behavior, welfare, and production of layers. Overall birds have many types of retinal regional specializations, which have been interpreted with respect to both ecology and behavior. Light is one part of a complex of the physical phenomenon called electromagnetic radiation, which is depending on its wavelength. Light consists of 3 different aspects; intensity, photoperiod, and spectral content color. Photoperiod manipulation is likely the most important aspect of light in poultry production. Lighting programs in laying hen farms are depending on photoperiod, whereas, one hour increase in daylength leads to increase in 4 egg numbers. Overall, the use of either an increasing or intermittent lighting program will improve the welfare over those birds raised on constant light photoperiods. The light source may have an effect on leg disorders, with the use of fluorescent bulbs causing a lower incidence of the problem as compared to incandescent bulbs. Furthermore, the light intensity plays important role in poultry welfare, where the decrease in light intensities may cause lower body weights by altering behavioral patterns and can also cause eye damage, increased mortality, and a result in physiological changes in the birds. The different light colors had significant differences in all behaviors, plumage scores, foot condition, and growth performance of layers due to the presence of many types of retinal regional specializations. Thus, this article concludes that the source, spectra, intensity, and regime of light supplementation become major factors in modern poultry management.</p> Hesham Hosny Mohammed ##submission.copyrightStatement## 2018-11-22 2018-11-22 XXX XXX 10.1234/svu.v2i1.40 Effect of Epidermal Growth Factors (EGF) on the Maturation and Developmental Competence of Buffalos’ Oocytes and Embryo Stages In Vitro <p>The present study aims to study the effects of epidermal growth factors (EGF) supplementations to the in vitro maturation (IVM) medium of buffalo's oocytes on the oocyte maturation rate and embryo development competence. The ovaries were collected from El-Monieb slaughters house and transferred directly to the laboratory for the experiment processing. Excellent and good cumulus oocytes complexes (COCs) were aspirated from 3-8 mm diameter follicles. TCM-199 medium were used for in vitro maturation. In experiment I, COCs were incubated in EGF-containing IVM medium as; 0 (control or CTL), 10, 20 and 50 ng/ml EGF for 24 hrs at 38.5°C in humidified environment; 5% CO<sub>2</sub> and 95% humidity. In experiment II, COCs were incubated in vitro fertilization (IVF) medium as; 0 (control or CTL), 10, 20 and 50 ng/ml EGF for 24 hrs in the same condition. In experiment III, COCs were incubated in vitro culture (IVC) medium as; 0 (control or CTL), 10, 20 and 50 ng/ml EGF for 24 hrs in the same condition. According to the expansion of oocytes and attaining the developmental embryo stages of morula and blastocyst, our results have shown that addition of 20 ng/ml of EGF to the IVM medium significantly increased the oocyte maturation and fertilization rates compared to those of CTL (76.96 <strong>±</strong> 9.04 vs. 51.3 ± 4.66 and 67.96 <strong>±</strong> 2.76 vs. 42.03 ± 4.83 %, respectively) (P&lt;0.05). On the other hand, Addition of 20 ng/ml of EGF to the IVM medium significantly increased the fertilization rates compared to other concentrations (10 and 50 ng/ml) (67.96 <strong>±</strong> 02.76 vs. 49.43 <strong>±</strong> 03.67 and 34.70 <strong>±</strong> 01.40, respectively). However, the developmental rates to morula and blastocyst stages in response to addition to IVC medium variably increased rather than those of control despite no significance. &nbsp;&nbsp;</p> Nasra Ahmed Yousef Hassan Abdel-Sabour Hussein Magdy Ramadan Badr Ahmed Ezzat Ahmed ##submission.copyrightStatement## 2018-11-21 2018-11-21 85 94 10.1234/svu.v1i2.39