Monday, 12 June 2017

Seroprevalence of antibodies to astrovirus in chickens in Grenada, West Indies

Research (Published online: 13-06-2017)
11. Seroprevalence of antibodies to astrovirus in chickens in Grenada, West Indies
Ravindra Nath Sharma, Romane Dufayet, Thomas Maufras, Kathryn O' Connell and Keshaw Tiwari
Veterinary World, 10(6): 636-639
ABSTRACT
Aim: Chicken astroviruses (CAstV) are known to cause mild gastroenteritis, growth depression, and even mortality in poultry, especially in chickens, turkeys, and ducks. To the best our knowledge, there is no published information on CAstV in Grenada. This study was conducted to determine the prevalence of astrovirus in chickens in Grenada.
Materials and Methods: Blood samples from 366 indigenous chickens and 92 commercial chicken layers were collected from all parishes of the island and tested for antibodies against CAstV using commercial enzyme-linked immunosorbent assay.
Results: The seroprevalence of antibodies against astrovirus was 57.6% (95%, Confidence interval [CI]: 47.4-67.2) in commercial layers and 61.5% (95%, CI: 56.4-66.3) in indigenous chickens. The results show the presence of infection throughout the island.
Conclusion: The results show the infection with CAstV in approximately half of the chicken population in Grenada. This is the first report on the prevalence of CAstV in chickens in Grenada and the Caribbean region.
Keywords: Astrovirus, chicken astroviruses, chickens, Grenada, seroprevalence.
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Saturday, 10 June 2017

Enhancing the growth performance of replacement female breeder goats through modification of feeding program

Research (Published online: 11-06-2017)
10. Enhancing the growth performance of replacement female breeder goats through modification 
of feeding program
A. A. A. Ghani, M. S. Shahudin, M. Zamri-Saad, A. B. Zuki, H. Wahid, A. Kasim, M. S. Salisi and 
Hasliza Abu Hassim
Veterinary World, 10(6): 630-635
ABSTRACT
Aim: The study was conducted at a smallholder goat farm located in Labu, Negeri Sembilan, Malaysia. The objective of this study was to evaluate the effect of proper feeding program on growth performances of replacement breeder goats.
Materials and Methods: A total of 30 healthy female boer cross goats at the age of 4 months old with average initial live body weight (BW) of 20.05±0.5 kg were used for on-farm feeding trial to evaluate the growth performance as preparation for breeding purposes. The experimental goats were divided into two groups of 15 animals each labeled as control and treatment groups, which were kept under intensive farming system. Goats in control group were fed with normal routine feeding protocol practiced by the farmer, while goats in the treatment group were fed with new feed formulation. Throughout the experimental period, on-farm monitoring and data collection were carried out. Initial BW and body condition score (BCS) were recorded before the start of the experiment while final BW and BCS were gained after 7 months of the experimental period. Average daily gain (ADG) was calculated after the experiment end. Data on BW, ADG, and BCS were recorded from both groups for every 2 weeks and reported monthly. The feed intake for the control group was 2.8 kg/animal/day which practiced by the farmer and 3.2 kg/animal/day as new feed formulation for the treatment group.
Results: After 7 months of the experimental period, final BW shows an improvement in treatment group (39.1±1.53 kg) compared with control group (32.3±1.23 kg). The ADG in treatment group also gives promising result when comparing with control group. Goats in treatment group significantly attained better ADG than control group which were 126.7 g/day and 83.3 g/day, respectively. For the BCS, goats in the treatment group had shown an improvement where 86.67% (13 out of 15) of the group had BCS≥3 (1-5 scoring scale) and only 66.67% (10 out of 15) of the control group had BCS≥3.
Conclusion: Therefore, it was concluded that implementation of proper feeding program as shown in treatment group give promising result to improve the growth performance of replacement breeder goats which can be adopted by the farmers to improve farm productivity.
Keywords: feeding, goat, growth performance, replacement breeder.
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Study of morphology, chemical, and amino acid composition of red deer meat

Research (Published online: 10-06-2017)
9. Study of morphology, chemical, and amino acid composition of red deer meat
Eleonora Okuskhanova, Bahytkul Assenova, Maksim Rebezov, Kumarbek Amirkhanov, Zhanibek Yessimbekov, 
Farida Smolnikova, Almagul Nurgazezova, Gulnur Nurymkhan and Marilyne Stuart
Veterinary World, 10(6): 623-629
Aim: The aim of this study was to evaluate red deer (maral) meat quality based on chemical composition, pH, water-binding capacity (WBC), and amino acid content.
Materials and Methods: Maral meat surface morphology measurements were obtained by scanning electron microscopy. Active acidity (pH) was determined by potentiometry. Samples were analyzed for WBC by exudation of moisture to a filter paper by the application of pressure. Chemical composition (moisture, protein, fat, and ash fractions) was obtained by drying at 150°C and by extraction, using ethylic ether, and ashing at 500-600°C. The amino acid composition was obtained by liquid chromatography.
Results: Maral meat, with a pH of 5.85 and an average moisture content of 76.82%, was found to be low in fat (2.26%). Its protein content was 18.71% while its ash content was 2.21%. The amino acid composition showed that lysine (9.85 g/100 g), threonine (5.38 g/100 g), and valine (5.84 g/100 g) predominated in maral meat, while phenylalanine (4.08 g/100 g), methionine (3.29 g/100 g), and tryptophan (0.94 g/100 g) were relatively low in maral meat compared to other meats. The average WBC was found to be 65.82% and WBC was found to inversely correlate with moisture content.
Conclusion: Low-fat content, high mineral content, and balanced amino-acid composition qualify maral meat as a worthy dietary and functional food.
Keywords: amino acid, composition, maral, red deer meat, quality, water-binding capacity.
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Friday, 9 June 2017

Effect of high and low roughage total mixed ration diets on rumen metabolites and enzymatic profiles in crossbred cattle and buffaloes

Research (Published online: 09-06-2017)
8. Effect of high and low roughage total mixed ration diets on rumen metabolites and enzymatic profiles in crossbred cattle and buffaloes
S. K. Sinha, V. B. Chaturvedi, Putan Singh, L. C. Chaudhary, Mayukh Ghosh and Swati Shivani
Veterinary World, 10(6): 616-622



doi: 10.14202/vetworld.2017.616-622



Abstract

Aim: A comparative study was conducted on crossbred cattle and buffaloes to investigate the effect of feeding high and low roughage total mixed ration (TMR) diets on rumen metabolites and enzymatic profiles.

Materials and Methods: Three rumen-fistulated crossbred cattle and buffalo were randomly assigned as per 3x3 switch over design for 21-days. Three TMR diets consisting of concentrate mixture, wheat straw and green maize fodder in the ratios of (T1) 60:20:20, (T2) 40:30:30, and (T3) 20:40:40, respectively, were fed to the animals ad libitum. Rumen liquor samples were collected at 0, 2, 4, 6, and 8 h post feeding for the estimation of rumen biochemical parameters on 2 consecutive days in each trial.

Results: The lactic acid concentration and pH value were comparable in both species and treatments. Feed intake (99.77±2.51 g/kg body weight), ruminal ammonia nitrogen, and total nitrogen were significantly (p<0.05) higher in buffalo and in treatment group fed with high concentrate diet. Production of total volatile fatty acids (VFAs) was non-significant (p>0.05) among treatments and significantly (p<0.05) greater in crossbred cattle than buffaloes. Molar proportions of individual VFAs propionate (C3), propionate:butyrate (C3:C4), and (acetate+butyrate):propionate ([C2+C4]:C3) ratio in both crossbred cattle and buffalo were not affected by high or low roughage diet, but percentage of acetate and butyrate varied significantly (p<0.05) among treatment groups. Activities of microbial enzymes were comparable among species and different treatment groups. A total number of rumen protozoa were significantly (p<0.05) higher in crossbred cattle than buffaloes along with significantly (p<0.05) higher population in animal fed with high concentrate diet (T1).

Conclusion: Rumen microbial population and fermentation depend on constituents of the treatment diet. However, microbial enzyme activity remains similar among species and different treatments. High concentrate diet increases number of rumen protozoa, and the number is higher in crossbred cattle than buffaloes.

Keywords: buffalo, crossbred cattle, rumen ecology, rumen metabolites.

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Thursday, 8 June 2017

Using real-time polymerase chain reaction as an alternative rapid method for enumeration of colony count in live Brucella vaccines

Research (Published online: 08-06-2017)
7. Using real-time polymerase chain reaction as an alternative rapid method for enumeration 
of colony count in live Brucella vaccines
Waleed S. Shell, Mahmoud L. Sayed, A. A. Samy, Ghada Mohamed Al-Sadek, Gina Mohamed Mohamed 
Abd El-Hamid and Abde Hakam M. Ali
Veterinary World, 10(6): 610-615
ABSTRACT
Aim: Brucellosis is a major bacterial zoonosis of global importance affecting a range of animal species and man worldwide. It has economic, public health, and bio-risk importance. Control and prevention of animal brucellosis mainly depend on accurate diagnostic tools and implementation of effective and safe animal vaccination program. There are three types of animal Brucella live vaccines - Brucella melitensis Rev-1 vaccine, Brucella abortus S19, and B. abortus RB51. Evaluation of these vaccines depends mainly on enumeration of Brucella viable count. At present, used colony count method is time consuming, costly and requires especial skills. Hence, the aim of this study is to use and standardize real-time polymerase chain reaction (RT-PCR) as an alternative, quantitative, sensitive, and rapid method to detect the colony count of Brucella in live Brucellavaccine.
Materials and Methods: Four batches of different live Brucella vaccines were evaluated using of conventional bacterial count and RT-quantitative PCR (RT-qPCR) using BSCP31 gene specific primers and probe. Standard curve was generated from DNA template extracted from 10-fold serial dilution of living B. abortus RB51 vaccine to evaluate the sensitivity of RT-qPCR.
Results: Results revealed that three batches of living Brucella vaccines were acceptable for Brucella colony count when traditional bacterial enumeration method was used. Results of RT-qPCR were identical to that of conventional bacterial count.
Conclusion: Results concluded that RT-qPCR was relatively sensitive compared to traditional bacterial colony count of these vaccines.
Keywords: Brucella, colony count, RB51, Rev-1, real-time polymerase chain reaction, S19, vaccines.
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Tuesday, 6 June 2017

Cytological endometritis and its agreement with ultrasound examination in postpartum beef cows

Research (Published online: 07-06-2017)
6. Cytological endometritis and its agreement with ultrasound examination in postpartum beef cows
N. Salah and N. Yimer
Veterinary World, 10(6): 605-609


N. Salah: Department of Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM 43400 Serdang, Selangor, Malaysia; Department of Obstetrics and Surgery, Faculty of Veterinary Medicine, University of Diyala, Baquba, 00964, Iraq.
N. Yimer: Department of Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM 43400 Serdang, Selangor, Malaysia.


doi: 10.14202/vetworld.2017.605-609

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Article history: Received: 18-02-2017, Accepted: 13-04-2017, Published online: 07-06-2017

Corresponding author: N. Yimer

E-mail: nurdeg2006@gmail.com

Citation: Salah N, Yimer N (2017) Cytological endometritis and its agreement with ultrasound examination in postpartum beef cows, Veterinary World, 10(6): 605-609.


Abstract

Background: Endometritis, which is one of the most common diseases in dairy cows postpartum, causes severe economic losses, including increased open days, calving intervals, and numbers of services to achieve conception.

Aim: This study aimed to evaluate the ultrasound method and its agreement with the endometrium cytology method, which is used to diagnose cytological endometritis in beef cows. Moreover, we determined which method has higher sensitivity and specificity at 4 and 5 weeks postpartum.

Materials and Methods: The study was conducted 20-35 days postpartum. A total of 53 clinically healthy beef cows (28 Brangus and 25 Kedah-Kelantan breeds) from three beef farms were obtained. All cows were evaluated at 4 and 5 weeks postpartum, using ultrasound and cytobrush endometrial examination methods to diagnose cytological endometritis.

Results: Endometrial cytology result showed that 11.3% (6/53) and 9.4% (5/53) of the cows exhibited cytological endometritis 4 and 5 weeks postpartum, respectively. A weak-to-moderate agreement found between the diagnostic methods (k=0.29 - 0.50; p<0.01 and k=0.38 - 0.49) at 4 and 5 weeks postpartum respectively.


Conclusion: The percentage of beef cows that were positive to cytological endometritis was low (polymorphonuclear cells, =8%) at 4 and 5 weeks postpartum. Results showed that the ultrasound method is useful and practical for diagnosing endometritis 4 and 5 weeks postpartum. This method exhibited 60% sensitivity, 93.8% specificity, and a 0.50 kappa value, especially when presence of intrauterine fluids and measurement of cervix diameter used in combination.

Keywords: beef cows, cytology, endometritis, polymorphonuclear cells, ultrasound.

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Characterization of hemagglutination activity of emerging Newcastle disease virus in Bangladesh

Research (Published online: 06-06-2017)
5. Characterization of hemagglutination activity of emerging Newcastle disease virus in Bangladesh - Helal Uddin, Kamrul Islam, Mukti Barua, Shariful Islam and Abdul Ahad
International Journal of One Health, 3: 28-35
  doi: 10.14202/IJOH.2017.28-35

Abstract
Aim: Newcastle disease (ND) is an important viral disease for poultry caused by avian paramyxovirus which can be identified by its nature of agglutination activity with red blood cell (RBC) of different species. The study was aimed to characterize the hemagglutinating (HA) activity of ND virus (NDV) at three different temperatures using RBC of five avian species, six mammalian species, and eight different human blood groups.
Materials and Methods: The study was conducted from January to December 2014 at Chittagong Veterinary and Animal Sciences University. Five avian and six different mammalian species were selected for the study. In each species, two blood samples were collected aseptically. Eight different blood groups (A+, A−, B+, B−, AB+, AB−, O+, and O−) were studied in human. HA test was performed using two virus strains ND lasota and field isolate of very virulent NDV (VVNDV) with mentioned species of RBC at chilling (4°C), incubating (37°C), and room temperature (24°C).
Results: Avian RBC requires less time for agglutination than mammalian RBC. Incubation temperature (37°C) requires lowest time and chilling temperature requires highest time for agglutination of RBC. Duck RBC requires lowest time (17.81 min) while chicken RBC needs highest (57.5 min) time for HA at incubation temperature and at chilling temperature, respectively, against ND lasota virus and with field strain. Goat RBC requires significantly higher time for HA (184.68 min) at chilling temperature than other mammalian species. Human RBC requires almost similar time but O+ and O− blood group do not show any HA activity.
Conclusion: ND is considered as an economically significant disease which is highly contagious in nature infecting many avian species. The threat of ND outbreak to poultry industry necessitates effective control measures to reduce the burden in commercial and backyard farming in Bangladesh.
Keywords: chilling temperature, hemagglutination, incubation temperature, Newcastle disease virus, Newcastle disease virus lasota strain, very virulent Newcastle disease virus strain.
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