Extraction of chitosan and its oligomers from shrimp shell waste, their characterization and antimicrobial effect

Research (Published online: 12-02-2017)

6. Extraction of chitosan and its oligomers from shrimp shell waste, their characterization and antimicrobial effect - Tarun Kumar Varun, Swaraj Senani, Natasha Jayapal, Jayaram Chikkerur, Sohini Roy, Vijay Bhasker Tekulapally, Mayank Gautam, and Narender Kumar

Veterinary World, 10(2): 170-175

   doi: 10.14202/vetworld.2017.170-175

Abstract

---

Aim: The present study was performed to utilize the shrimp shell waste for chitin and chitosan production, characterization by Fourier transform infrared (FT-IR) technique and to evaluate the antimicrobial effects of chitosan oligomers produced by depolymerization of chitosan by nitrous acid.

Materials and Methods: Chitosan was extracted from the shrimp shell waste by the chemical method and characterized by FT-IR. Chitooligomers were produced by depolymerising chitosan using nitrous acid, and the chitooligomers were tested for antimicrobial effect against four gut pathogenic organisms, i.e., Enterobacter aerogen (National Collection of Dairy Culture [NCDC] 106), Enterococcus faecalis (NCDC 119), Escherichia coli (NCDC 134), and Staphylococcus aureus (NCDC 109) by well diffusion method using Muller-Hinton agar. A pure culture of pathogenic organisms was collected from NCDC, ICAR-National Dairy Research Institute, Karnal.

Results: Extracted chitosan characterized by FT-IR and chitooligomers demonstrated antimicrobial effect against four gut pathogenic organisms used in this study. Zone of inhibitions (mm) were observed in E. faecalis (13±0.20), E. coli (11.5±0.4), S. aureus (10.7±0.2), and E. aerogen (10.7±0.3). E. faecalis showed larger inhibition zone as compared to all other organisms and inhibitions zones of E. aerogen and S. aureus were comparable to each other.

Conclusion: Shrimp waste can be utilized for chitosan production, and the chitooligomers can be used as feed additive for gut health enhancement and have potential to replace antibiotics from the feed. Along with value addition pollutant load could be reduced by waste utilization.

Keywords: chitin, chitooligomers, chitosan, Fourier transform infrared, shrimp waste.

Evaluation of tissue-engineered bone constructs using rabbit fetal osteoblasts on acellular bovine cancellous bone matrix

Research (Published online: 08-02-2017)

5. Evaluation of tissue-engineered bone constructs using rabbit fetal osteoblasts on acellular bovine cancellous bone matrix - Rashmi, Rekha Pathak, Amarpal, H. P. Aithal, P. Kinjavdekar, A. M. Pawde, A. K. Tiwari, P. Sangeetha, P. Tamilmahan, and A. B. Manzoor

Veterinary World, 10(2): 163-169

   doi: 10.14202/vetworld.2017.163-169

Abstract

---

Aim: The aim of this study was to generate composite bone graft and investigate the rabbit fetal osteoblasts adhesion, proliferation and penetration on acellular matrices of cancellous bone.

Materials and Methods: Acellular cancellous bone was prepared and developed as in the previous study with little modification. These matrices were decellularized by rapid freeze and thaw cycle. To remove the cell debris, they were then treated with hydrogen peroxide (3%) and ethanol to remove antigenic cellular and nuclear materials from the scaffold. Primary osteoblast cells were harvested from 20 to 22 days old rabbit fetal long and calvarial bone. These cells were cultured and characterized using a specific marker. The third passaged fetal osteoblast cells were then seeded on the scaffold and incubated for 14 days. The growth pattern of the cells was observed. Scanning electron microscope and hematoxylin and eosin staining were used to investigate cells proliferation.

Results: The cells were found to be growing well on the surface of the scaffold and were also present in good numbers with the matrix filopodial extensions upto inside of the core of the tissue.

Conclusion: Thus, a viable composite scaffold of bone could be developed which has a great potential in the field of bone tissue engineering.

Keywords: composite grafts, osteoblasts, tissue engineering.

Comparative study of obstructive urolithiasis and its sequelae in buffalo calves

Research (Published online: 08-02-2017)

4. Comparative study of obstructive urolithiasis and its sequelae in buffalo calves - Yasmin H. Bayoumi and Noura E. Attia

Veterinary World, 10(2): 156-162

   doi: 10.14202/vetworld.2017.156-162

Abstract

---

Aim: The present work was designed to study the incidence of obstructive urolithiasis and to apply comparative diagnosis to urine retention cases.

Materials and Methods: A total of 78 non-castrated buffalo calves aging 3-11 months were included in this study, 68 calves were admitted to the Veterinary Teaching Hospital, Zagazig University, Egypt, during the study period with a history of anuria, and they were classified into three groups; intact bladder group (19 calves), uroperitoneum group (45 calves), and ruptured urethra group (4 calves). 10 apparently healthy calves were used for comparison. On the basis of history, clinical, laboratory, and ultrasonographic findings diagnosis was achieved.

Results: There was a marked increase in the incidence of obstructive urolithiasis in winter season, especially in winter months of 2016. Calves within the age of 3-4 months and 6-8 months were mostly affected. Inappetence to anorexia, restlessness or depression, and abdominal distension were the most observed signs in the diseased calves. Laboratory findings revealed hemoconcentration and a significant increase in blood urea nitrogen and serum creatinine levels in all diseased groups. Hyperproteinemia, hypocalcemia, and hyperphosphatemia with electrolytes imbalance were recorded in the uroperitoneum group. Ultrasonographically, distended urinary bladder with distal acoustic enhancement revealed obstructive urolithiasis with intact bladder while anechoic fluid in abdominal cavity indicates uroperitoneum.

Conclusion: On the basis of all findings, calves with intact bladder were in superior condition than those with a ruptured urethra and both were better than those with uroperitoneum.

Keywords: buffalo calves, clinical, laboratory, obstructive urolithiasis, ultrasonography.

Effect of supplementation of lecithin and carnitine on growth performance and nutrient digestibility in pigs fed high-fat diet

Research (Published online: 07-02-2017)

3. Effect of supplementation of lecithin and carnitine on growth performance and nutrient digestibility in pigs fed high-fat diet - Arathy Saseendran, K. Ally, P. Gangadevi and P. S. Banakar

Veterinary World, 10(2): 149-155

   doi: 10.14202/vetworld.2017.149-155

Abstract

---

Aim: To study the effect of dietary supplementation of lecithin and carnitine on growth performance and nutrient digestibility in pigs fed high-fat diet.

Materials and Methods: A total of 30 weaned female large white Yorkshire piglets of 2 months of age were selected and randomly divided into three groups allotted to three dietary treatments, T1 - Control ration as per the National Research Council nutrient requirement, T2 - Control ration plus 5% fat, and T3 - T2 plus 0.5% lecithin plus 150 mg/kg carnitine. The total dry matter (DM) intake, fortnightly body weight of each individual animal was recorded. Digestibility trial was conducted toward the end of the experiment to determine the digestibility coefficient of various nutrients.

Results: There was a significant improvement (p<0.01) observed for pigs under supplementary groups T2 and T3 than that of control group (T1) with regards to growth parameters studied such as total DM intake, average final body weight and total weight gain whereas among supplementary groups, pigs reared on T3 group had better intake (p<0.01) when compared to T2 group. Statistical analysis of data revealed that no differences were observed (p>0.05) among the three treatments on average daily gain, feed conversion efficiency, and nutrient digestibility during the overall period.

Conclusion: It was concluded that the dietary inclusion of animal fat at 5% level or animal fat along with lecithin (0.5%) and carnitine (150 mg/kg) improved the growth performance in pigs than non-supplemented group and from the economic point of view, dietary incorporation of animal fat at 5% would be beneficial for improving growth in pigs without dietary modifiers.

Keywords: animal fat, carnitine, growth performance, lecithin, supplementation.

Characterization of Salmonella Gallinarum from an outbreak in Raigarh, Chhattisgarh

Research (Published online: 05-02-2017)

2. Characterization of Salmonella Gallinarum from an outbreak in Raigarh, Chhattisgarh - Chandrahas Sannat, Anil Patyal, Nidhi Rawat, R. C. Ghosh, D. K. Jolhe, R. K. Shende, S. D. Hirpurkar and Sanjay Shakya

Veterinary World, 10(2): 144-148

   doi: 10.14202/vetworld.2017.144-148

Abstract

---

Aim: The present investigation was conducted to isolate and characterize Salmonella Gallinarum from an outbreak of fowl typhoid in layer birds.

Materials and Methods: Clinically ill and dead layer birds from an outbreak were investigated. History, clinical signs, and postmortem lesions were suggestive of fowl typhoid. Postmortem samples including heart blood, intestinal contents, pieces of ovary, and liver were collected and processed immediately for bacterial culture, serotyping and antibiotic sensitivity tests. Isolates were further screened for the presence of extended spectrum beta lactamase (ESBL) (bla_TEM) gene by polymerase chain reaction.

Results: On the basis of cultural, staining and biochemical characteristics; three bacterial isolates were confirmed as S. Gallinarum. On serotyping, somatic antigen O: 9 and 12 with nonflagellated antigen were detected in all three isolates. Isolates were intermediate sensitive to amoxycillin, amoxyclav, gentamicin and ciprofloxacin and resistant to most of the antibiotics including chloramphenicol, ampicillin, ceftazidime, cefexime, cefepime, azithromycin, nalidixin, tetracycline, oxytetracycline, and streptomycin. Two isolates were found to harbor ESBL (bla_TEM) gene.

Conclusion: Beta lactamase producer S. Gallinarum was confirmed as cause of increased mortality in layer birds during present investigation. Existence of multi drug resistant Salmonella poses serious threat to poultry industry in Chhattisgarh.

Keywords: bla_TEM, O: 9; 12, poultry, Salmonella Gallinarum.

Seroprevalence of bovine herpesvirus-1 antibodies in bovines in five districts of Uttarakhand

Research (Published online: 04-02-2017)

1. Seroprevalence of bovine herpesvirus-1 antibodies in bovines in five districts of Uttarakhand - Vipul Thakur, Mahesh Kumar, and R. L. Rathish

Veterinary World, 10(2): 140-143

   doi: 10.14202/vetworld.2017.140-143

Abstract

---

Aim: This study was conducted to know the status of bovine herpesvirus-1 (BHV-1) antibodies in the bovines of the selected area of Uttarakhand.

Materials and Methods: A total of 489 serum samples, 392 of cattle and 97 of buffaloes were randomly collected from the unvaccinated bovine population of five districts viz., Dehradun, Haridwar, Nainital, Pithoragarh, and Udham Singh Nagar and were tested by avidin biotin enzyme-linked immunosorbent assay for BHV-1 antibodies.

Results: The overall prevalence was observed to be 29.03%. At district level, the highest prevalence was recorded in Pithoragarh district (40.00%) while it was lowest in district Udham Singh Nagar (16.00%). The prevalence of BHV-1 antibodies was found to be higher in unorganized dairy units (31.02%) compared to organized farms (26.51%) in Uttarakhand. Buffaloes were found to have greater prevalence (38.14%) than cattle (26.78%) while on sex-wise basis; it was found that more females (30.08%) were harboring antibodies to the virus than males (16.21%).

Conclusion: The study revealed that the population in the area under study has been exposed to BHV-1 and hence prevention and control strategies must be implemented.

Keywords: avidin biotin enzyme-linked immunosorbent assay, bovine herpesvirus-1, seroprevalence.

Associations between single nucleotide polymorphisms in multiple candidate genes and body weight in rabbits

Research (Published online: 30-01-2017)

20. Associations between single nucleotide polymorphisms in multiple candidate genes and body weight in rabbits - Karim El-Sabrout and Sarah A. Aggag

Veterinary World, 10(1): 136-139

   doi: 10.14202/vetworld.2017.136-139

Abstract

---

Aim: In this study, we examined parts of six growth genes (growth hormone [GH], melanocortin 4 receptor [MC4R], growth hormone receptor [GHR], phosphorglycerate mutase [PGAM], myostatin [MSTN], and fibroblast growth factor [FGF]) as specific primers for two rabbit lines (V-line, Alexandria) using nucleotide sequence analysis, to investigate association between detecting single nucleotide polymorphism (SNP) of these genes and body weight (BW) at market.

Materials and Methods: Each line kits were grouped into high and low weight rabbits to identify DNA markers useful for association studies with high BW. DNA from blood samples of each group was extracted to amplify the six growth genes. SNP technique was used to study the associate polymorphism in the six growth genes and marketing BW (at 63 days) in the two rabbit lines. The purified polymerase chain reaction products were sequenced in those had the highest and lowest BW in each line.

Results: Alignment of sequence data from each group revealed the following SNPs: At nucleotide 23 (A-C) and nucleotide 35 (T-G) in MC4R gene (sense mutation) of Alexandria and V-line high BW. Furthermore, we detected the following SNPs variation between the two lines: A SNP (T-C) at nucleotide 27 was identified by MC4R gene (sense mutation) and another one (A-C) at nucleotide 14 was identified by GHR gene (nonsense mutation) of Alexandria line. The results of individual BW at market (63 days) indicated that Alexandria rabbits had significantly higher BW compared with V-line rabbits. MC4R polymorphism showed significant association with high BW in rabbits.

Conclusion: The results of polymorphism demonstrate the possibility to detect an association between BW in rabbits and the efficiency of the used primers to predict through the genetic specificity using the SNP of MC4R.

Keywords: associated genes, body weight, prediction, rabbit, single nucleotide polymorphism.