Evaluation of efficacy of stabilizers on the thermostability of live attenuated thermo-adapted Peste des petits ruminants vaccines

• Published in: Virologica Sinica Vol. 26; no. 5; pp. 324 - 337
• Main Authors: Riyesh, Thachamvally, Balamurugan, Vinayagamurthy, Sen, Arnab, Bhanuprakash, Veerakyathappa, Venkatesan, Gnanavel, Yadav, Vinita, Singh, Raj Kumar
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer-Verlag 01-10-2011; SP Wuhan Institute of Virology, CAS; KeAi Publishing Communications Ltd; National Research Centre on Equines,Sirsa Road,Hisar 125001,Haryana,India; Division of Virology,Indian Veterinary Research Institute,Campus Mukteswar 263138,Nainital District,Uttarakhand,India; Project Directorate on Animal Disease Monitoring And Surveillance(PD ADMAS),Hebbal,Bangalore 560024,India%Division of Virology,Indian Veterinary Research Institute,Campus Mukteswar 263138,Nainital District,Uttarakhand,India%Division of Virology,Indian Veterinary Research Institute,Campus Mukteswar 263138,Nainital District,Uttarakhand,India; Veterinary Type cultures Centre,National Research Centre on Equines,Sirsa Road,Hisar 125001,Haryana,India%Division of Virology,Indian Veterinary Research Institute,Campus Mukteswar 263138,Nainital District,Uttarakhand,India
• Subjects: ambient temperature; Animals; Biochemistry; Biomedical and Life Sciences; Biomedicine; Diluents; disease control; Drug Stability; Drug Storage; Excipients - chemistry; Excipients - pharmacology; Freeze Drying; half life; Lactalbumin; Medical Microbiology; Microbial Genetics and Genomics; Microbiology; Oncology; Peste des petits ruminants; Peste-des-Petits-Ruminants - prevention & control; Ruminantia; Shelf life; Sodium chloride; stabilizers; Sucrose; Temperature; Thermal stability; vaccination; Vaccines; Viral Vaccines - chemistry; Viral Vaccines - immunology; Virology; Stabilizers; Thermo-stability; PPR; Vaccines; Thermo-adapted; Diluents
• ISSN: 1674-0769; 1995-820X
• DOI: 10.1007/s12250-011-3205-x

In this study, thermo-adapted (Ta) PPR vaccines were assessed for their stability at 25, 37, 40, 42 and 45°C in lyophilized form using two extrinsic stabilizers {lactalbumin hydrolysate-sucrose (LS) and stabilizer E} and in reconstituted form with the diluents (1 mol/L MgSO4 or 0.85% NaCl). The lyophilized vaccines showed an expiry period of 24–26 days at 25°C, 7–8 days at 37°C and 3–4 days at 40°C. LS stabilizer was superior at 42°C with a shelf-life of 44 h, whereas in stabilizer E, a 40 h shelf-life with a comparable half-life was observed. At 45°C, the half-life in stabilizer E was better than LS and lasted for 1 day. Furthermore, the reconstituted vaccine maintained the titre for 48 h both at 4°C and 25°C and for 24–30 h at 37°C. As both the stabilizers performed equally well with regard to shelf-life and half-life, the present study suggests LS as stabilizer as a choice for lyophilization with 0.85% NaCl diluent, because it has better performance at higher temperature. These Ta vaccines can be used as alternatives to existing vaccines for the control of the disease in tropical countries as they are effective in avoiding vaccination failure due to the breakdown in cold-chain maintenance, as this vaccine is considerably more stable at ambient temperatures.