1.
Safety Level And Efficacy Of Controlled Release Urea On Performance And Health Status Of Nili Ravi Buffalo
by Muhammad Mobin (2007-VA-156) | Prof. Dr. Aneela Zameer Durrani | Dr. Jawairia Ali Khan | Dr. Nisar Ahmad.
Material type: ; Literary form:
not fiction
Publisher: 2014Dissertation note: Livestock is one of the major sectors of Pakistan’s agrarian based economy. During 2013-14, it contributed almost 55.4% to the agricultural value added and 11.9% to national GDP. In the livestock sector, gross value addition increased from Rs.735 billion to Rs.756 billion; revealing an increase of 2.9% as compared to the previous year. Livestock is considered the best tool for poverty alleviation, as most of the livestock are owned by poor people who live in the rural areas. Pakistan is 4th largest Milk producing country in the World. Its Cattle Population is 33 Million while Buffalo Population is about 30 Million (Economic Survey of Pakistan, 2013-14). Despite large population, per animal production is very low.The low productivity of these animals is because of poor quality feed stuff. Their productivity can be enhanced by feeding them balanced ration.
Growing human population urges the intense need to explore the present livestock resources to fulfill the animal protein requirements. It is impossible unless optimal fodder and forage production is ensured. In Pakistan, low quality fodders coupled with the reduction in the fodder area are the main constraints, which adversely affect the animal production. In future, it is expected that ruminants will be more dependent on forages because readily expanding human population will have direct competition with livestock for edible grains.
Among the problems facing the livestock in the tropics is the low protein tropical grasses and the high cost of alternate sources of protein such as the Soybean and other oil cake. A portion of nitrogen in feeds for ruminants may be provided in the form of simple nitrogen compounds (or0non-protein0nitrogen0NPN) 0that are degraded in the0rumen to release ammonia (NH3), which is used by rumen microorganisms to produce amino acids. The amount of NPN that can be provided is limited. The product which is the urea, when it releases NH3 faster than it can be converted into microbial protein excess NH3is absorbed through the rumen wall, causing toxication.
Protein is often0the0major0limiting0nutrient for ruminants. Protein-rich leguminous forages and vegetable protein supplements are usually expensive or not available.The manufacture0of0urea and0ammonia for use as0fertilizer has been greatly0expanded in0many countries, 0but these compounds0could0not be0used more0widely in feeds for0ruminants. The ability0of0the0micro-organisms0in0the0rumen0of0cattle0and0sheep0to0utilize0urea0sources0to form0true protein0that0can0be converted0to meat0and0milk0by the0animals, represents0an important0contribution0to0man's0food0supply.0Maximizing0microbial0protein0synthesis0and flow0to0the0duodenum0by0reducing the0recycling of0microbial N in the rumen offers a potential0to improve0the production0efficiency0of ruminants.In general, the efficiency of utilization of dietary N by cattle is relatively low under normal production conditions (Castillo et al, 2001) with a global average N-efficiency in cattle estimated at 7.7 % (Van der Hoek, 1998). Urea is used rather inefficiently for production of protein products (Broderick et al, 2009) and due to its wide use in ruminant feeds, may0be0partially0responsible for0the poor N efficiency0in cattle. Low efficiency of utilization of dietary urea has been attributed to the rapid0hydrolysis0to0ammonia (NH3) in0the0rumen0by microbial0enzymes which occurs at a higher rate than its utilization byrumen bacteria, leading to ruminal accumulation and absorption0of0ammonia andsubsequent excretion of0urea in the urine (Golombeski0et0al., 2006; Highstreet0et0al,2010).Furthermore if used above threshold level, the main problem with urea usage is that it can cause toxicity and even death of the animals. Farmers hesitate to use urea as a source of protein, resulting which his animals remain underfed and never achieve the peak production.
Urea0poisoning0is0one0of0the0more0commonly0suspected0toxicities0of0cattle. Urea0is0used as0a source0of non-protein0nitrogen0in feed0supplements.In ruminants,0nitrogen0from0urea is released0in the0rumen as0ammonia0and0can0be0used0by0rumen0micro0flora0to0synthesize protein. This0protein0thenbecomesavailable0to0the0animal0through0the0normal0processes of digestion0and0absorption. However,if0 more0ureaisconsumed0than the rumen organisms can0metabolize, the0ammonia0is0absorbed0from0the0rumen0into0the0blood.Ruminal pHbecame alkaline due to the hydrolysis of urea to0ammonia (Buffalo Bulletin,2002). The ammoniaisthen0converted0back0to urea in0the liver and is0the0excreted by0the0kidneys. This0pathwaycan easily be0overwhelmed,0when excess0ammonia0and urea0circulate0in the blood,0causing0poisoning. Poisoningcanoccur0rapidly0from a few0minutes0to four0hours after0consumption. Suspect0urea0poisoning0if cattle are found0dead close to0the0supplement (H. Parkes et al. 2003).Slow release urea has been shown to affect ruminal fermentation characteristics.Most notably, slow release urea is intended to0reduce0the release rate0of NH3 within the0rumen. Most reports on controlled release urea have shown a reduction in ruminal NH3 concentration when measured (Cherdthonget al, 2011; Huntington etal, 2006b; Taylor- Edwards0et0al, 2009d). This is the reason why slow release urea presents a lower risk for ammonia toxicity than feed grade urea. Ruminal NH3 concentration is often related to ruminal pH, as the protonation of NH3 toNH4+ when ammonia from urea ionizes, can result in an increase in ruminalpH. Consequently, there are reports of higher ruminal pH for animals fed urea than those fed slow release urea (Cherdthongetal, 2011; Taylor-Edwards et al, 2009b)
Availability: Items available for loan: UVAS Library [Call number: 2216-T] (1).
2.
Clinico-Epidemiological And Therapeutical Study On Giardiasis In Sheep And Goat
by Syed Ans Mujtba (2014-VA-233) | Dr. Wasim Yaqub | Dr. Jawairia Ali Khan | Dr. Asim Khalid Mahmood.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: In small ruminants parasitic infestation is one of the major constraints to the livestock industry in developing countries. It adversely affects economic performance, mainly by retarded growth rates, lower FCR, and reduced milk and meat production. Beside this the animal housing is also an issue, as the farmers are mostly of low financial status animals are often kept in houses where the parasites find favourable environment for their survival and propagation. A number of parasitic species and other associated risk factors have been defined in transmitting various protozoan parasites to the sheep and goat. However there is lack of published and explained data regarding the above mentioned risk factors in different zones of Patoki. So in this phase of study risk factors recording and prevalence of giardia were performed for sheep and goat. The objective of the study was to determine the prevalence of Giardia in small ruminants, its treatment and blood examination before and after treatment.
Giardia species are involved in causing giardiasis, that is ultimately responsible for immense of the economic losses by retarded growth, lowered FCR and reduced milk and meat production under varying housing conditions in sheep and goat (Hypothesis).
This present study was conducted at Pattoki clinic of University of Veterinary and Animal sciences (UVAS) Lahore. Animals from public as well as from private farms were also included in this study. A total of 700 animals (n=350 sheep, n=350 goats) were examined for screening of Giardiasis by faecal sampling. The data regarding animals breed, age of animal, clinical history, feeding, housing and various treatment protocols as well as feedback was entered in the questionnaire. 5 gms of faecal from each animal (N=700) collected. Samples were stored at 4 C for further processing. The affected animals were divided into 3 groups i-e A, B, and C. For the therapeutical study Metronidazole, Albendazole and Ishq Pecha Extract to the group A, B & C respectively. In the haemotological examination CBC was performed followed by the collection of 5 ml of the blood aseptically.
Animals from areas of poor sanitary system and suspected area, having poor BCS, diarrhoea, anorexia, rough hair coat were included in the study.
A total of 64 positive animals were selected, which further divided into 3 groups A, B, and C, Each group having 16 animals and 2 sub group. In Group A, Metronidazol 25 mg/kg orally for 5days, Group B, Albendazol 10 mg/kg bid for 5 days orally were given while Group C, Ishq Pecha Extract (Liquid) was given. Efficacy of the treatment determined on the basis of absence of CPG via Zinc Sulphate faecal flotation method.
After the 5 days consecutive treatment of positive goats, the samples were drawn days from the relative groups to evaluate the effectiveness of treatment for lowering the CPG.
The data thus collected was analyzed statistically by applying one way analysis of variance (ANOVA).
The results of this study that 75 samples were found positive indicating the prevalence of giardia i-e 10.7. And the efficacies of different drugs as Metronidazol 48.67%, 68% and 85.77% on day 3rd, 7th and day 14th respectively, Albendazol , indicated its efficacy was 27.88%, 0% and 69.52% on day 3rd, day 7th and day 14th. While, Ishq Pecha Extract showed an efficacy of 15.6%, 31.54% and 52.95% against Giardiasis.
It is apparent from the above mentioned findings that Metronidazole has highest efficacy than albendazole. Therefore the use of metronidazole against giardiasis in sheep & goats has been preferably recommended.
Availability: Items available for loan: UVAS Library [Call number: 2537-T] (1).
3.
Clinicopathological Features Of Anhidrosis In Equines
by Abdul Wadood Barya (2009-VA-367) | Dr. Jawairia Ali Khan | Dr. Waseem Yaqub | Prof.Dr.Masood Rabani.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: In a country like Pakistan where the horses are kept for race, show and more specifically draught purposes the disease like Anhidrosis may cause a huge economic loss to owner. Anhidrosis has been described as a physiologic phenomenon that results as consequence of prolonged stimulation of the sweat glands by epinephrine secreted as a response to conditions of hot and humid climate. The sweat glands accommodate to the high epinephrine content of the blood, thus becoming insensitive to it.
From June to August the horses were examined clinically until 15 anhidrotic horses obtained on the basis of clinical signs (marked tachypnea, increased rectal temperature, and limited or absent sweating in response to appropriate stimuli. Dry, flaky skin, alopecia, generalized fatigue, anorexia and decreased water consumption, residual areas of sweating may be noted in the throat latch and mane, under the saddle or halter, and in axillary or groin area) for the estimation of TSH and for treatment trials.
This study describes that there is 12.7% prevelance of Anhidrosis in horses irrespective of age, sex and breed in Lahore and Pattoki regions of Punjab Pakistan. Further it was observed that more Anhidrosis cases were in July and August as there is increased temperature as well as moist enviorment
The normal range of Tsh in horses is from 0.2 to 0.9 ng/ml. The horses under study for anhidrosis all have the Tsh concentration in range so there is no significance difference in normal and diseased horses.
The group comprising of 5 member given Thyroxin tablets 50 mg daily for 3 days and v orally with 0.9% normal saline 2000ml i/v daily recovered completely. Hence this study gave a treatment trial for Anhidrotic horse to recover with less adverse effect.
The use of germinating CicerArietinum (Kala chana) and VernoniaanthelminticaWilld (Kali Zeeri) in anhidrosis may be taken as a supportive therapy to treatment.
Availability: Items available for loan: UVAS Library [Call number: 2609-T] (1).
4.
Effects And Remedial Measures Of Aflatoxin B1 On Bovine Calves In Punjab
by Omer Naseer (2002-VA-65) | Dr. Jawairia Ali Khan | Prof. Dr. Muhammad Sarwar Khan | Dr. Muhammad Ovais Omer.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Aflatoxins B1 are most toxic metabolites produced by Aspergillus fungi in/on foods and feeds, probably best known and most intensively researched aflatoxins globally. AFB1 have been associated with several diseases, e.g. aflatoxicosis in livestock, pets including humans throughout the world. Occurrence of AFB1 is influenced by certain environmental factors like geographic location, agro-economic practices and susceptibility of feed commodities to fungal invasion during pre-harvest, storage, and processing periods. AFB1 has grabbed greater attention than any other mycotoxins due to their demonstrated potent carcinogenic effect in susceptible animals and their acute toxicological effects in humans. As the absolute safety will be never achieved, most of the world struggled to limit aflatoxin exposure by imposing regulations on feed commodities.
So, in this study, we had collected 67 concentrated samples, thirty six samples from Gujranwala and thirty one from Kasur to examine the occurrence of aflatoxin B1. The aims of this study were to investigate the aflatoxin B1 in calf feed, effect of different concentrations of aflatoxin B1 on productive performance of calves and determine the comparative efficacy of commercially available mycotoxin binders and liver tonics against AFB1 in bovine calves. Feed samples were obtained from different livestock farms and cattle feed mills, toxin levels in each feed sample were determined by HPLC. AFB1 level was higher at feed mills (40.33±2.21 ppb and 49.0±1.95 ppb) than farms (34.96±2.65 ppb and 44.95±2.41 ppb) both in Gujranwala and Kasur respectively. Fungus was isolated and grown on Sabouraud’s dextrose agar on the basis of microscopic characters and species within genus characterized by colony characters/macroscopic characters, mostly Aspergillus species was present in the feed samples which produce mycotoxins. The second most prevalent species were the Fusarium. Mucor and the Pencillium were respectively third and fourth in number. Our results have shown that Alternaria was not present in Gujranwala and Rhizopus was absent in the feed samples collected from the Kasur. Out of mycotoxin contaminated concentrate feed samples, the highest frequency of Aspergillus (43.3%) was observed, followed by Fusaram (38.8%), Mucor (8.9%), Penicillium(5.9%), Rhizopus (1.5%) and Alternaria species (1.5%).
Our results also indicated that growth of Aspergillus spp. can be minimized by controlling the different factors like pH, temperature, light and humidity, which are essential for the proper growth and development. The antifungal activity of methanolic extract of clove, neem and garlic was also determined in which maximum MIC showed by garlic.
Thirty six bovine calves of 6 to 12 months of age were kept in UVAS, Pattoki campus (Ravi Campus) .in four different replicates having 9 animals each. Different concentrations, i.e. 0.6 mg/kg, 0.8 mg/kg and 1.0 mg/kg was administered along with concentrated feed and check out productive performance along with physiological profile. The most pathological concentration of aflatoxin B1 in experiment number 3 was given to the two groups of bovine calves along with two different commercially available mycotoxin binders i.e. Yeast based and second one was clay based HSCAS mycotoxin binder at recommended doses. Efficacy of mycotoxin binders on feed samples was analyzed by using HPLC and also evaluates the productive performance of the animals.Efficacy of two liver tonics i.e.silymarin and choline chloride was observed on CBC, LFT and RFT of bovine calves.
Present study has clearly displayed the adverse effect of aflatoxin B1 on feed consumption, hematological and serum biochemical parameters related to liver and kidney in bovine calf. Results indicated that HSCAS mycotoxin adsorbent was able to fully detoxify aflatoxin B1. Silymarin had great impact on the liver to cope the adverse effects of the AFB1 as compared to the choline chloride, which was proved with the help of CBC, LFT and RFT.
Availability: Items available for loan: UVAS Library [Call number: 2630-T] (1).
