2.
Effect Of Taurine Supplementation On Post-Thaw Quality Of Sahiwal Bull Semen
by Muhammad Irfan (2013-VA-599) | Dr. Aijaz Ali Cheema | Dr. Muhammad Younas | Dr. Amjad Riaz | Dr. Muhammad Haroon Akbar.
Material type: ; Literary form:
not fiction
Publisher: 2015Dissertation note: It is well recognized that cryopreservation of bovine semen results in decreased spermatozoal viability due to cryodamages. Oxidative stress is produced due to Reactive Oxygen Species (ROS) during freez-thaw process.Extreme production of ROS during cryopreservation has been associated with decreased post thaw %age motility, viability, and membrane integrity and sperm fertility capability. Basically antioxidants works to reduce or, taking up the formation of ROS. In recent years, taurine has been used as anti-oxidant in semen extenders and has been used in the cryopreservation of sperm from many species to improve post-thaw quality of spermatozoa by inhibiting lipid peroxidation and protecting cells against accumulation of ROS. Therefore, supplementation of taurine in semen extendercontaining 0,15,30,45 and 60mM concentration was used to decrease the harmful effects of cryopreservation on Sahiwal bull spermatozoa. Three Sahiwal bulls (4-8years) were used in the present study. The bulls were maintained at Semen production unit, Qadirabad and were offered good quality seasonal fodder (at the rate of 10% body weight), supplemented with concentrates (2-4kg/day). The semen was collected from each bull twice a week. Initially the semen was assessed for volume, motility, and concentration. Then the semen was pooled from all bulls and divided into 5 aliquots (150 ul each). Each aliquots diluted with 5groups extender which contain 0, 15, 30, 45 and 60mM taurine concentration. The semen was filled in 0.5ml straws cooled to 5c for 4 h, then frozen and stored in liquid nitrogen (-196c). Post-thaw motility, viability, plasma membrane integrity, acrosome and DNA integrity was evaluated and statistically analyzed by one way ANOVA. The group supplemented with 60mM concentration of taurine decreased all parameters of post thaw quality ofSahiwal bull spermatozoa. However the group supplemented with 15mM concentration of taurine show higher significantly (p<0.05) results than control and other groups. The post-thaw motility of the group supplemented with 15mM taurine concentration (54.50±2.1) higher significantly (p<0.05) than control (45.50±0.90) and other groups. The treatment group of 15mM taurine concentration show signifantly (p<0.05) higher viability (58.60±1.58 vs50.80±0.70) , plasma membrane integrity (57.10±1.43 vs 49.00±0.65) acrosome integrity (56.80±0.59 vs48.10±1.66) and DNA integrity (98.80±0.23 vs 97.54±0.39) as compared to the control and other groups. It is concluded that the maximum beneficial effect of addition 15mM taurine in tris-based egg yolk extender gives better post-thaw parameters. Availability: Items available for loan: UVAS Library [Call number: 2269-T] (1).
4.
Point Prevalence Of Gastrointestinal Helminthes Along With Their Effect On Various Hematological Parameters In Commercial Dairy Herds In District Kasur, Punjab
by Inam Ullah (2007-VA-145) | Dr. Muhammad Hassan Saleem | Dr. Syed Saleem Ahmad | Dr. Muhammad Haroon Akbar.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Parasitic problem is a major constraint of ruminant production and causes great economic
loss to dairy industry by retarded growth, low productivity and increased susceptibility of
animals to other infections. Gastrointestinal helminthes are prevalent in dairy animals in and
around district Kasur and have significant effect on the hematological parameters of the
infected animals (Hypothesis).
Samples were randomly collected from 200 apparently healthy animals (n = 100
cattle; n =100 buffalo). From each animal a hand full of fecal sample was collected directly
from the rectum in a disposable polythene sleeve. Proper dress was adopted during sample
collection. The samples were kept in refrigerator at 4oC for examination on same day or next
day. Each animal sample was identified, labeled and information about age, sex, body
condition, management, current disease, vaccination, deworming. (Performa attached) are
recorded. Samples were brought to Medicine Lab, CMS, UVAS, Lahore, for examination of
helminthes eggs in the fecal samples. For hematological examination samples were refered to
university diagnostic lab (UDL) UVAS, Lahore.
Out of 100 cattle 24 (24%) were found positive and out of 100 buffalo 37 (37%) were
found to be positive for gastrointestinal helminthes. It can be seen that prevalence was more
in buffalo as compared to cattle. The species wise prevalene for cattle was Toxocara 29.16 %,
Haemonchus 12.5%, Fasciola 4.1%, Strongyloids 12.5%, Trichostrongyloids 12.5%,
Ostertagia species 8.33 % and mixed infections were 8.33% and for buffaloes it was
Toxocara 35.13 % , Haemonchus 16.21%,, Fasciola 5.40%, Strongyloids 13.51% ,
Trichostrongyloids 16.21%, Ostertagia species 10.81% and mixed infections was 8.11%.
Female cattle and buffalo (31.72%) were more prone to infection than male animals
(14.28%). The age wise prevalence for less than 6 month, 6-12 month, 1-2 years, 2-3 years
Summary
47
and more than 3 years was 52.5%, 78.26%, 16%, 14.04% and 20% respectively. The
haemotological values for cattle and buffaloes infected with gastrointestinal helminth for
TEC (%), Hb (g/dl), MCV (fl), MCHC (g/dl), Lymphocyte (%), Monocyte (%), Eosinophil
(%) and Basophils( %) are 4.07±0.065, 7.010±0.052, 48.45 ± 0.20, 28.26 ± 0.074, 53.72 ±
0.112, 3.143 ± 0.117, 4.067 ± 0.021, 0.298 ± 0.031 and 5.09 ± 0.76, 8.012 ± 0.058, 50.56 ±
0.21, 30.71 ± 0.085, 55.82 ± 0.114, 4.167 ± 0.236, 5.076 ± 0.023, 0.301 ± 0.034 respectively.
Data regarding the prevalence and associated risk factors were analyzed using
Pearson’s chi-square test. The data regarding hematological study were analyzed by Students
T-test using SPSS (Statistical package for social sciences) version 20. P < 0.05 were
considered significant. Availability: Items available for loan: UVAS Library [Call number: 2531-T] (1).
