Preparation And Evaluation Of A Recent Infectious Laryngotracheitis (Ilt) Vaccine From A Local Field Isolate
Journal Title: Journal of Applied Veterinary Sciences - Year 2020, Vol 5, Issue 3
Abstract
Infectious laryngotracheitis (ILT) is a respiratory tract disease affecting chickens worldwide. The disease leads to severe production losses due to increased mortality, decreased egg production, and delayed body weight gain, causing enormous economic losses to the poultry industry. ILT is controlled through vaccination with live-modified attenuated vaccines of chicken embryo origin (CEO) and/or the tissue-culture origin (TCO). This study was conducted to develop Specific Pathogenic Free (SPF) egg-adapted live attenuated ILT vaccine from the field strain Fayoum_2018 isolated from broilers in Fayoum Province, Egypt in 2018. The isolate Fayoum_2018 with accession number (MN082684) was characterized molecularly as a TCO vaccine related strain. Measurement of immunity in vaccinated chicks employing the potency test revealed that chicks vaccinated with 0.5 ml of prepared ILT vaccine exhibited ELISA with 1905 antibody titer at 2nd-week post-vaccination, which was considered an ILT adequate immune response and increased till reach 3497 antibody titer at 6th week post-vaccination. The current work revealed that Fayoum_2018 ILTV egg adapted live attenuated vaccine produced a satisfactory antibodies titer that was efficient in controlling the ILT field infection in Egypt.
Authors and Affiliations
Nada A. Fathy, Abd El-Moneam M. M, Ibrahim S, Norhan Nagy Mohamed, Amina Radwan, Rafik Hamed Sayed
Evaluate Risk Analysis of Measurement Uncertainty (MU) of Different Methods Applied for Veterinary Vaccines Evaluation
Veterinary Serum and Vaccine Research Institute (VSVRI ) objected to producing highly efficient vaccines from reference or local isolates according to the international specifications for protecting animals and poultry a...
Serological Detection of Newcastle Disease Virus Antibody in Vaccinated and Non-Vaccinated Indigenous Chickens and Guinea Fowls in Atacora and Donga, Northern Benin
Poultry farming is crucial for the livelihoods of small-scale producers in the Northen Benin, yet the industry faces challenges from diseases like ND, which threaten both poultry health and economic stability. This study...
Detection Of Streptomycin Residues In Sheep Carcasses In Duhok Province, Kurdistan Region, Iraq
In general, the Iraqi farmers of breeding and fattening of sheep using broad-spectrum antibiotics like tetracycline and aminoglycosides family for treatment and prophylaxis without considering to the withdrawal periods o...
A Review on the Potential Effective Cytoprotective Role of Ginseng in Rat's Organ
Panax ginseng is among the herbal agents traditionally utilized for thousands of years. It is used commonly as dried roots with possible multifaceted medical characteristics, including anti-inflammatory, anti-neoplastic...
The Fertility Outcomes of Egyptian Buffalo Cows after Ovsynch and Presynch-Ovsynch Protocols
The present study aimed to compare the reproductive outcomes after the blind application of the standard Ovsynch and Presynch Ovsynch protocols on Egyptian Buffaloes (Bubalus bubalis) during the breeding season. Fifty mu...