Electronic Monitoring Of Storage And Transport Temperatures Of Thermostable Newcastle Disease Vaccine (Strain I-2) From Manufacturer To Rural Community Vaccinators
A pilot study was conducted where temperatures of I-2 vaccine (Batch no. 22) were monitored during storage and transport from vaccine production laboratory in Temeke, Dar es Salaam to Dodoma Rural district during a Newcastle disease (ND) vaccination campaign in May/June 2004. Electronic temperature monitor (data logger) was programmed to record the temperature after every hour for 15 days (356 hr) and was placed with the vaccine. A diary was attached to the vaccine lot to record each change in locations, type of carriage and storage. The data logger was sent back after the vaccination campaign and data were retrieved using a Tinytag Explorer software. The results showed that I-2 vaccine was stored and transported in temperatures within the range of 1.06ºC to 28.77ºC (average17.50ºC). The storage temperatures in ADRI's refrigerator ranged from 2 to 4ºC (average 2ºC). The changes in temperatures during long distance transport of vaccines in a 10 litre correctly ice-packed cool box were monitored and results showed that temperatures ranged between 1.06-7.21ºC (average 4ºC) for 10 hr. Storage of the vaccine at DALDO Office, Dodoma Rural before it reached the vaccinator was exposed to temperature ranges of 4.72-17.86ºC (average 10.70ºC) this was noted as unacceptable refrigerator recordings (outside 2°-8°C). In the field the vaccine was exposed to temperatures between 13.76ºC and 28.77ºC for 3 days of an ND vaccination campaign in Mvumi Makulu village. Ambient temperatures in the study sites and along transport routes reached 31.09ºC. Nevertheless, the results of this study indicated that the cold chain system used was satisfactorily in agreement with the current requirements for I-2 vaccine storage and transport.
<Tanzania Veterinary Journal Vol. 24 (1) 2007: pp. 67-73