1.
Immune Response Of Broilers Treated With Amprolium And Chloramphenicol
by Rakhshanda Perveen Cheema | Dr. Muhammad Akram Muneer | Dr. Haji Ahmad | Dr. Muhammad Naeem | Faculty of Veterinary Sciences.
Material type: ; Format:
print
Publisher: 1994Dissertation note: The birds that received arnprolium at recommended dosage levels had higher mean body weight than the chioramphenicol medicated, cyclophosphamide treated or untreated control birds.
Arnprolium treatment did not adversely affect the weight of bursa of Fabricius, spleen, thymus and liver of birds. Chioramphenicol treatment slightly depressed the weight of bursa of Fabricius and thymus. Cyclophosphamide treatment of birds in early life resulted in bursal atrophy and slight depression of splenic weight.
As compared to Cyclophosphamide treated and non-rnedicated control birds, the sera of NDV vaccinated birds fed Amprolium had higher antibody titres on day 42. The sera of chioramphenicol treated NDV vaccinated birds had lower antibody titres as compared to non-medicated control birds on day 42. The post-challenge sera of NDV vaccinated birds fed Amprolium also had higher antibody titre as compared to NDV vaccinated cyclophosphamide and chioramphenicol treated birds. The NDV vaccinated chioramphenicol treated and NDV vaccinated cyclophosphamide treated had high post NDV challenge mortality and the NDV vaccinated birds on amproliurn medicated rations and those on non-medicated rations did not have any significant post NDV challenge mortality.
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2.
Immunomodulatory Effects Of Amprolium 20% And Sulphaquinoxaline In Broilers Chickens
by Nighat Yasmeen | Dr. Muhammad Akram Muneer | Dr. Mohammad | Sh. Muhammad Amin | Faculty of Veterinary Sciences.
Material type: ; Format:
print
; Literary form:
not fiction
Publisher: 1994Dissertation note: This study indicated that Amprolium 20% (Amidiostat) when used at recommended dosage levels (0.5 Kg/ton of feed did not interfere with the body weight gains of birds; did not have adverse effects on weights of lymphoid organs such as bursa of Fabricius, spleen, thymus, liver; did not interfere with the development of serum antibody in vaccinated or non-vaccinated and challenged birds; Amprolium 20% medication in feed had beneficial effects on serum antibody development; did not result in higher post-challenge mortality of vaccinated birds as compared to the non-medicated vaccinated control birds. however Sulphaquinoxaline when used at recommended dosage level (125 gm/ton of feed) did partially interfere with the weight of lymphoid organs such as bursa of Fabricius, spleen, thymus, liver and also interfere with the development of serum antibody in vaccinated or non vaccinated and challenged birds. The injection to baby chicks on first 4 consecutive post- hatching days with cyclophosphamide resulted in lower body weights, destruction of the bursa of Fabricius, poor antibody response of birds to vaccination against ND, and very high post-challenge mortality, UOfl challenge with virulent NDV.
The weight gain studies indicated that vaccinated and non-vaccinated birds on Amprolium 20% and suiphaquinoxaline medicated feeds had non- significantly higher body weights than those on non-medicated ration at 42 days of age. Amproliurn 20%, at recommended dosage level, had more beneficial effects on the body weights than the suiphaquinoxaline. These studies further indicated that vaccinated birds kept on Amprolium 20% medicated feed had significantly higher serum antibody titres on (lay 42 than the vaccinated non-medicated control birds. The serum antibody titres of vaccinated birds on Amprolium 20% medicated feed were significantly higher thai-i those fed sulphaquinoxaline at recommended dosage levels. From the results of this study it is concluded that long term use of Suiphaquinoxaline at recommended dosage levels moderately suppress the immune system of the birds. It is also observed that Amprolium 20% (Amidiostat) is not immunosuppressive drug when used at recommended dosage levels. It has rather beneficial effects on growth performance and immune response of birds. However there is a need for further investigations.
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3.
Role Of Maternally Derived Antibodies In Protection Against Infectious Bursal Disease Virus.
by Sameera Akhtar | Dr. Muhammad Akram Muneer | Dr. Haji Ahmed | Dr. Muhammad Naeem | Faculty of Veterinary Sciences.
Material type: ; Format:
print
Publisher: 1996Dissertation note: This project was designed to study the role of maternally derived antibody in protection against IBD and efficacy of immunization with live and killed IBDV vaccines. A total of 250 day old chicks were divided into five groups i.e. groups A, B, C, D and E, each group having equal number of chicks. Group A was non-treated control for the study of the decay rate of maternal antibodies. The chickens of groups, B, C and D were vaccinated with live, killed and combination of live and killed IBDV vaccines. All the chicks were vaccinated with NDV vaccines except group E which was kept as negative control. There was no interference in the IBDV and NDV in the development of immunity.
The birds showed the presence of passive immunity, both through AGPT and IHA tests. Maternal antibody was detectable only through AGPT. The IHA indicated the presence of immunity in all the birds upto day 14th.
It was further observed that the birds having maternal Ab titres against IBDV (upto a titre of 5.27) also resisted the experimental challenged with the CVS-6).
All the vaccinated groups indicated the immune responses post vaccination. Both the AGP and IHA tests detected decline in immunity on 7th day post-vaccination and then a gradual increase in titres at 14th day. The titres were at the peak after day 28 post booster vaccination.
The results of challenge indicated that the birds having antibody titre (GMT=68.39) against IBDV resisted the IBDV challenge. Typical clinical signs of IBD were noted. The bursa was odematous and double in size. The spleen and thymus were slightly enlarged. Statistical analysis of lymphoid organ body weight ratio's of spleen, bursa and thymus indicated a significant differences in the vaccinated and control chickens.
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4.
Standardisation Of Indirect Haemagglutination Test For Monitoring Infectious Bursal Disease Virus
by Sajid Mahmood | Dr. Muhammad Akram Muneer | Dr. Hajid | Dr. Khushi Muhammad | Faculty of Veterinary Sciences.
Material type: ; Format:
print
; Nature of contents: ; Literary form: Publisher: 1997Dissertation note: Indirect haemagglutination (IHA) test was standardized and evaluated to moniter antibodies against infectious bursal disease (IBD). It was observed that oil based vaccine prepared from bursae of fäbricius of infected birds, induced a high level of antibody which were detected by agar gel precipitation test (AGPT). It was recorded Chat tannic acid, glutaraldehyde and chromium chloride had 0.0000781, 0.003906 and 0.0001562 per cent subagglutinating dilutions in normal saline solution (pH 7.2) respectively while 0.000001220, 0.0156 and 0.0025 subagglutinating dilution of the coupling agents were found in phasphate buffered saline (pH 7.2), respectively.
Indirect. haemagglutination test is sensitive and specific serological technique to study infectious bursal disease. However, antigen dilution to sensitize erythrocytes, source of erythrocytes, chemical nature of diluent, interaction temperature and time, nature and concentration of coupling agent coated erythrocytes and antiserum against IBD, had influenced the sensitivity of IHA test.
Ten percent antigen for sensitizing sheep erythrocytes, incubation temperature of 37°C for 10 minutes for antigen, tannic acid (0.005%) and erythroéyte interaction, freshly prepared sensitized erythrocytes and normal saline solution (pH 7.2) as diluent were found suitable for detecting maximum titre of anti-IBD antibodies through the IHA. Moreover it was observed that the standardized IHA proportionally showed reduction in the titre on dilution of serum. The antibody titre in the IHA was the well having serum dilution, showing resistance to bleed (flow) on tilting the plate for 5 seconds. The final results of antibody titre were achieved within 120 minutes post processing of the samples.
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5.
Assessment Of Microbicidal Efficacy Of Finvirus Uriach
by Shakil Akhtar | Dr.Muhammad Akram Muneer | Dr.Haji Ahmad | Dr.Khushi Muhammad | Faculty of Veterinary Sciences.
Material type: ; Format:
print
Publisher: 1998Dissertation note: A total of 84 fresh fertile hen eggs were obtained from the poultry farm near College of Veterinary Sciences (CVS), Lahore and 32 duck fertile eggs were obtained from the villages in the vicinity of Lahore. These eggs were incubated at 37°C in an automatic incubator for 11 days for the embryonic development. At the day 11 post incubation, the eggs were candled to confirm the presence of embryos. Eggs with dead embryos were discarded. The NDV, AIV and EDSV were obtained from Microbiology Section, C.V.S., Lahore and inoculated to the 11 day old embryonated eggs via allantoic sac route. After 72 hours allantoic fluid was collected and 4HA units of NDV, AIV and EDSV were calculated. Toxicity of a newly marketed disinfectant, Finvirus for developing chicken/duck embryos was determined and the efficacy of Finvirus uriach against NDV, AIV and EDSV was evaluated. In addition, phenol coefficient of "Finvirus" was calculated using Staphylococcus aureus. It was established that 0.5% dilution of Finvirus was not toxic to the embryo. From the findings of this investigation it was concluded that Finvirus uriach can inactivate NDV and AIV and EDS virus in minimum duration of 5 minutes at a concentration of 0.5%.
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6.
Isolation And Biological Characterization Of H7 Type Avian Influenza Virus
by Syed Abid Hussain | Dr. Muhammad Akram Muneer | Dr.Azhar | Dr.Masood Rabbani | Faculty of Veterinary Sciences.
Material type: ; Format:
print
Publisher: 2006Dissertation note: The present study was undertaken with the objectives to isolate and characterize avian influenza virus responsible for high morbidity and mortality in layers flocks in Karachi area of Pakistan. AIV H7 type was isolated from the morbid tissue samples by inoculating their tissue homogenate in the 9-1 1 day old developing chicken embryos. This isolate later declared as AIV H7 type, induced death of chicken embryos within 36 to 48 hours post inoculation. The type and subtype of the isolate was confirmed using known nionospecific antisera against various haemagglutinating viruses. Infectivity potential of AIV was determined by inoculating it in 9-11 day old embryos of layer, duck, desi-bird and pigeons. The AF from experimentally infected embryos, haernagglutinated the chicken red blood cells. However, the haemagglutination titer of virus in AF from eggs of various avian species was variable. For evaluating the survival/resistance of the virus against various chemical disinfectants, it was inoculated in embryonated chicken eggs following treatment of various dilutions disinfectants like Beloran, Zeptin and Formalin. These disinfectants were effective in inactivating the avian influenza virus at various concentration levels. For monitoring pathogenic characteristics, isolated virus was inoculated in the developing chicken embryos. The mean death time was evaluated as 42 hrs post inoculation. This investigation indicated that AIV-H7 type was widely circulating iii poultry flocks, and was causing high morbidity and mortality in the susceptible populations. The use of disinfectants like Beloran, Zeptin and F'orrnalin is suggested for inactivating the virus present in-and-around poultry farm premises.
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