No abstract available.
Rabies*

80% subjects among 50 bitten by dogs/cats were fully injected 4-6 doses of rabies vaccine. By ELISA (platelia Rage kit of Diagnostic Pasteur), we found that 42.5% of serum samples taken after injection 4 doses of rabies vaccine have titer 0.5IU/ml, it met WHO's minimum requirement. The GMT was 2.71 EU/ml. 62.5% of serum samples taken after injection 6 doses of rabies vaccine have titer 0.5IU/ml. The GMT was 3.14UE/ml.
Vaccines ; Rabies

This is a study on establishing the National References for inactivated rabies vaccine for human produced in ViÖt Nam. The results showed that the ViÖt Nam National References for Rabies Vaccine met the requirements of WHO
Vaccines ; Rabies

Rabies virus

Objectives: To determine the knowledge, attitude, and practices (KAP) on rabies prevention and control among primary care providers of children 0-18 years old. Methodology: This is an analytical cross-sectional study conducted among primary care providers of children 0- 18-years old in Barangay Sambag I, Cebu City, Philippines. A questionnaire to determine the KAP on rabies prevention and control, originally developed by Lañada et al., was modified and contextualized to the local setting. Respondents with at least 75% correct answers per domain were considered to have good overall knowledge, attitude, and practices. Furthermore, each question under the above domains was analyzed separately to determine any gaps in KAP. Results were recorded as frequencies and percentages. The association of KAP to one another and the respondents’ profiles were analyzed using Chi-square test with a level of significance of 0.05. Results: Among 285 respondents, 59.3% had poor knowledge, 35.8% had wrong practices, and 21.8% had negative attitude on rabies prevention and control. We found that 92.6% did not know that rabies is incurable. As to practices, performing “tandok” (42.5%), or the act of removal of rabies from a wound by using an animal horn, and applying herbal medicines (34%) were still done. Use of dog restraint (44.6%) and euthanasia (40%) weren’t favorable to study participants. Surprisingly, non-dog owners had good knowledge and positive attitude than dog owners. Conclusion Our study showed that majority of the study population had poor knowledge on rabies prevention and control, on disease transmission, and on the incurability of rabies. While majority had a positive attitude and correct practices, the unacceptability on the use of a dog restraint and euthanasia, especially among dog owners, were still evident.
Rabies ; Knowledge

BACKGROUND AND OBJECTIVE

Rabies continues to be a challenge in Davao City despite the efforts of the city’s local government to vaccinate primarily the non-stray dog population. Meanwhile, studies have shown that time-dependent vaccination strategy is considered a prime factor for a cost-effective rabies control strategy. Hence, this study aims to provide information that will determine the optimal vaccination strategy targeted to the stray dog population that minimizes the rabies-infected dog population and vaccination costs using optimal control theory (OCT).

OCT is used to identify the optimal level of key rabies control, i.e., vaccination. Here, OCT was applied to a modified Susceptible-Exposed-Infectious-Vaccinated (SEIV) compartmental model. The study's key parameters were derived from published articles on rabies in Davao City and similar regions, along with the city's rabies reports.

The findings revealed that while rabies remains endemic in the city, it is possible to reduce the number of cases through consistent implementation of vaccination programs to the exposed and susceptible dog populations. Nevertheless, the feasibility of these findings relies to the effective targeting of vaccine coverage for the dog population. From the simulations performed, the exposed dog population (i.e., pre-rabid dogs) was able to reach zero observation when the transmission rate (?) is 0.001 for all values of anti-rabies vaccine coverages for exposed (?) and susceptible (b) dog populations and ? = 0.01 only when ? = 0.7 and b = 0.7, ? = 0.7 and b = 0.5, and ? = 0.5 and b = 0.7. Consequently, the number of infectious dogs will thereby decrease. Moreover, a nonlinear correspondence was also observed in all scenarios between the vaccination rate and the number of rabies-exposed dogs such that the reduction in the incidence of rabies cases becomes apparent only when the vaccination rate is at least 0.9995.

In high rabies transmissibility scenarios, a time-dependent vaccination strategy demonstrated a reduction in the number of rabies-infected dogs. However, this approach involves a trade-off, limiting the period during which monthly vaccinations can be relaxed. Consequently, a robust and timely vaccination program for dogs is crucial to manage high rabies transmission rates. Lastly, the model simulation underscores the importance of initiating monthly vaccinations.

Vnukovo-32 a cell culture rabies is used to study the vaccine strain technology of inactivated culture rabies vaccine production in primary hamster kidney cells. The master and working seeds meet the criteria of rabies vaccine strain titer (5.5 log LD 50 - 7.1 log LD 50/ml) according to WHO standard. During the study, we have used the procedure for inactivated, non concentrated rabies vaccine production of Russia and other countries procedures as references. The result was we constructed the procedure for inactivated, concentrated cell culture rabies vaccine production at laboratory scale.
Rabies Vaccines ; Cells, Laboratories

Vnukovo-32 (cell culture rabies virus vaccine strain) was propagated experimentally in primary hamster kidney cell (PHKC), primary Chick embryo fibroblast cell (CEF) and human diploid cell (WI-38). These 3 cell lines were infected with Vnukovo-32 by the same mount of infection (MOl) - lLD50/l000 cells. The result showed that the Vnukovo-32 was adapted on all experimental cell lines, met the criteria of master seed (the titer ranging 6.4-7.5 log LD50/ml), and reached the highest titer on the 7th - 9th day postinfection in three cell groups. Moreover, the highest titer of Vnukovo-32 was met in human diploid cell (WI-38), then in PHCK, and the lowest was in CEF. From these results, it is suitable to use WI-38 to propagate Vnukovo-32 for master and working seed. The procedure for propagation of Vnukovo-32 is set up.
Rabies Vaccines ; Cells

The mortality rate due to rabies/100.000 inhabitants in Viet Nam was 0,43 during 1991-1995, was the highest mortality among 10 epidemic infectious diseases. From 1996-2000, some active interventive solutions had been implemented such as establishing the steering committee for rabies control; strengthening the role of the authority and co-ordination of ministries and sectors, promoting propaganda, education, training and building the special network; enhancing the quality of treatment and prevention for people who had been beaten by mad animals and suspected mad animals. As a result during 1996-2000 the mortality caused by bites of mad animals throughout the country reduced by more than 65% compared with 1991-1995. In some key provinces the mortality cause by bites of mad animals decreased 80-95%
Rabies ; Prevention & control

Study on the use of caprylic acid in the purification of anti rabies serum. The use of coprylic acid (octanoic) in the cleaning process IgG from horse plasma was studied to apply in the purification of anti rabies serum in the Institute of Vaccine and Biological Substances. When using caprylic acid in the purification of serum, the quality and quantity of the products were improved. The purity and colour of product was managed as desire. The process had a high effectiveness and short time of purification
Caprylic acid ; Rabies