Time filter

Source Type

Attia Y.A.,Damanhour University | Kamel K.I.,Egyptian Animal Production Research Institute
Animal | Year: 2012

A total of 28 adult V-line rabbits were fed ad libitum a control diet or a diet supplemented with 0.5%, 1.0% and 1.5% soybean lecithin (SL) for 12 weeks. Bucks that received 0.5%, 1.0% or 1.5% dietary SL had a higher ejaculate volume, mass motility, sperm concentration, total sperm output and total motile sperm. Dietary SL reduced the percentage of dead sperm and increased the normal sperm, and this concurred with an increase in blood testosterone concentration. Blood and seminal plasma total lipid, acid phosphatase and seminal plasma alkaline phosphatase were significantly increased because of inclusion of SL. Interestingly, SL reduced blood and seminal plasma thiobarbituric acid-reactive substances while increasing blood and seminal plasma glutathione content, glutathione S-transferase, glutathione peroxidase and superoxide dismutase activity. Conception rate and litter size at birth and weaning were also significantly improved. Practically, it could be suggested that SL is a suitable supplement for improving semen quality, antioxidant status, reproductive traits and the economic efficiency of V-line rabbit bucks and 1% is an adequate concentration. © 2011 The Animal Consortium. Source

Abdelwhab E.M.,Egyptian Animal Production Research Institute | Abdelwhab E.M.,The Federal Research Institute for Animal Health | Abdel-Moneim A.S.,Beni Suef University
Virulence | Year: 2015

Outside Asia, Egypt is considered to be an influenza H5N1 epicentre and presents a far greater pandemic risk than other countries. The long-term endemicity of H5N1 and the recent emergence of H9N2 in poultry call attention to the need for unravelling the epidemiology, ecology and highly diverse gene pool of influenza A virus (IAV) in Egypt which is the aim of this review. Isolation of a considerable number of IAV subtypes from several avian and mammalian hosts was described. Co-infections of poultry with H5N1 and H9N2 and subclinical infections of pigs and humans with H1N1 and H5N1 may raise the potential for the reassortment of these viruses. Moreover, the adjustment of IAV genomes, particularly H5N1, to optimize their evolution toward efficient transmission in human is progressing in Egypt. Understanding the present situation of influenza viruses in Egypt will help in the control of the disease and can potentially prevent a possible pandemic. © 2015 Taylor & Francis Group, LLC. Source

Ahmed S.,Suez Canal University | Ibrahim A.,Suez Canal University | Arafa A.S.,Egyptian Animal Production Research Institute
Tetrahedron Letters | Year: 2013

A novel polyhydroxylated sterol, 3β-25-dihydroxy-4-methyl-5α, 8α-epidioxy-2-ketoergost-9-ene (1) along with three new ceramides, N-[(2S,3R,E)-1,3-dihydroxyhexacos-4-en-2-yl]icosanamide (2), N-[(2S,3S,4R)-1,3,4-trihydroxyhexacosan-2-yl]icosanamide (3), and (R)-2′-hydroxy-N-[(2S,3S,4R)-1,3,4-trihydroxypentacosan-2-yl] nonadecanamide (4) were isolated from the Red Sea soft coral, Sinularia candidula. Complete structure elucidation was achieved through extensive spectroscopic analysis including one- and two-dimensional nuclear magnetic resonance spectroscopy. Sinularia candidula extracts of different polarities as well as the isolated pure compounds were screened against the highly pathogenic H5N1 avian influenza strain using the plaque inhibition assay in MDCK. The results indicated that the extracts of the Red Sea soft coral Sinularia candidula possessed potent antiviral activity (100% inhibition at a concentration of 1 μg/mL). The isolates 1, 2, 3, and 4 showed reduction of virus titer by 55.16%, 48.81%, 10.43%, and 15.76% at a concentration of 1 ng/mL, respectively. © 2013 Elsevier Ltd. All rights reserved. Source

Attia Y.A.,Damanhour University | Al-Hanoun A.,Egyptian Animal Production Research Institute | Bovera F.,University of Naples Federico II
Journal of Animal Physiology and Animal Nutrition | Year: 2011

The effect of bee pollen on productive and reproductive performances of adult buck rabbits and their offspring was studied during winter and summer seasons. Forty New Zealand White bucks were equally divided among four groups feeding the same commercial diet and receiving a water solution containing, respectively, 0 (control), 100, 200 and 300 mg bee pollen/kg body weight, twice per week along two experimental periods. The experimental periods were listed for ten weeks both during winter (30-40 weeks of age) and summer seasons (56-66 weeks of age). During the trials body weight, body weight gain, total feed intake, semen quality, fertility and blood constituents were determined. Fertility was determined after natural mating with no treated females. For each season, 80 weaned rabbits obtained from the bucks of the control group were equally divided (20 per group) among 4 levels (0, 100, 200 and 300 mg/kg BW) of bee pollen, given as a water solution twice per week. The offspring sired by bucks given 100, 200 and 300 mg (20 for each group and season) were not administrated bee pollen. The effect of bee pollen on growth performance of rabbits was studied from 4 to 12 weeks of age. Bee pollen at 200 mg/kg BW significantly (p < 0.01) improved semen quality, increased fertility percentage, improved biochemical profiles of blood and helps outstanding of bucks during both seasons. The same concentration of bee pollen increased body weight gain and survival rate and reduced feed intake and feed conversion ratio of offspring up to 12 weeks of age. © 2010 Blackwell Verlag GmbH. Source

Darwish R.A.,Mansoura University | Ashmawy T.A.M.,Egyptian Animal Production Research Institute
Theriogenology | Year: 2011

During lambing the expression of an appropriate behavioural response from both the ewe and the lamb are extremely important to lamb survival. The aim of this study was to show the effect of length and difficulty of the birth process on the expression of maternal and neonatal behaviour with consequences on homeothermy and survival of the neonate lamb. Data were collected from 61 Finnish Landrace × Rahmani crossbred (second generation) primiparous ewes and their single born lambs. Based on the average length of parturition, the ewes were grouped into short birth (less than 32.5 min) and long birth (equal to or higher than 32.5 min) classes. The data recorded include maternal and neonatal behaviour, lamb body temperature over the first 3 days of life and survival rate of the neonate lamb during the first week after birth. Blood samples were also collected from the lamb, pre-suckling and at 24 and 72 h after birth. The obtained sera were assayed for thyroid hormones (T 3 and T 4) that are associated with heat production. Ewes that had prolonged and difficult births did not show competent maternal behaviour compared to mothers with short and un-complicated deliveries, as they were slower to begin grooming their lambs after birth, spent less time licking their lambs, made less low-pitched vocalizations and nosing, were more likely to show rejection behaviour (10.34 % vs 5.4 %, P < 0.05), and were more likely to move away when the lamb sought the udder in an attempt to suck (acceptance rate, 55.5 % vs 64.79 %, P < 0.05). Similarly, lambs from a prolonged and difficult birth were significantly less vigorous after birth, as they had taken more time to stand, reach the udder and to suck successfully. These lambs had lower serum concentrations of T 3 and T 4, and they also had a reduced ability to maintain body temperature after birth. This effect persisted over the first 3 days of life and was associated with higher neonatal mortality in the first week after birth (11.54 %), compared to lambs from short and non-stressful birth processes (2.86 %, P < 0.01). From the present study, it can be concluded that, prolonged deliveries with birthing difficulty were one of the main causes of death of large, single-born lambs, as these complications cause the expression of inappropriate behavioural responses from both the ewe and neonatal lamb. Thus, interventions designed to reduce the incidence of prolonged parturitions are likely to be associated with better welfare for the ewe and the lamb and consequently improved lamb homeothermy and survival. © 2011 Elsevier Inc. Source

Discover hidden collaborations