The majority 81.7% (610) of the animal rabies were dogs. titre development in yearly vaccinated and irregularly vaccinated (not annual) adult dogs with owners is definitely closely similar irrespective of regularity in BMS-193885 vaccination. Previously vaccinated animals possess higher (2?IU/ml) antibody titres to begin with and have a higher antibody titre about day time 360 too. They display a very good antibody titre by day time 180. Unvaccinated animals start with low antibody titre and return to low titres by day time 360, but have a satisfactory antibody titre by day time 180. Conclusions A single dose of anti-rabies vaccination is not adequate for the maintenance of antibody titres for a period of 1 1?yr in BMS-193885 pups, juvenile dogs with owners and in dogs without owners. Maternal antibodies do not provide adequate safety to pups of previously vaccinated dams and pups of previously unvaccinated dams. Immunity development after vaccination seems to be closely related in both the groups of pups. Keywords: Antibody, Anti-rabies vaccine, Dogs, RFFIT, Sero-prevalence, Titre Background Rabies is a vaccine preventable, zoonotic disease [1]. Still it remains as a serious general public health problem all over the world [2]. It is generally transmitted to additional animals and humans through close contact with saliva from BMS-193885 infected animals [3]. It is estimated that 60,000 human being rabies-related deaths happen worldwide each year [1, 4, 5]. Sri Lanka offers invested a large amount of money to control dog rabies. Human being deaths due to rabies were further decreased from 56 (2.8 per 1,000,000) in 2007 to 19 (0.05 per 1,000,000) in 2014. This was the lowest incidence reported in Sri Lanka. This reduction was mainly because of mass vaccination of dogs against rabies, mass Animal Birth Control (ABC) programmes, Post Exposure Prophylaxis (PEP) for rabid and rabies suspected animal bites and mass consciousness programmes [6, 7]. Being an island BMS-193885 once rabies is completely eradicated from Sri Lanka it should be better to prevent re-introduction of rabies from additional countries [7, 8]. The mass vaccination of dogs is considered fundamental in rabies control programmes in many countries including Sri Lanka [7, 9]. The total number of animal rabies instances reported during the 2014 was 746. The majority 81.7% (610) of the animal rabies were dogs. Nearly 50% of the total dog human population in the country are vaccinated yearly [10]. A strong body of theoretical and empirical evidence shows that vaccinating 70% of the dog human population during annual campaigns should be adequate to control rabies [11, 12]. According to the vaccine routine practice in Sri Lanka dogs are vaccinated against rabies at the age of 3?weeks if the dam is previously vaccinated. If dam is definitely unvaccinated, the 1st vaccine is given to the pup at the age of 6?weeks having a booster at the age of 3?weeks and subsequently with annual boosters. The study carried out by Gunatilake et al. [13] showed that antibodies transferred from your dam is definitely well below the protecting level in the pups of vaccinated dams at the age of 3?months. As the authorities has been investing large amount of money on the treatment of puppy bite victims, it is important to determine the ideal time period for the 1st Anti-rabies Vaccination (ARV) for pups and the level of BMS-193885 antibody titres in dogs until the time of revaccination. Measurement of humoral immune response (disease neutralizing antibody titres) in vaccinated dogs is helpful in judging the protectiveness of vaccinated dogs [14]. Inside a sero-survey carried out in Garborone, Bostwana, it was shown that dogs that had more than one successive vaccination against rabies experienced better antibody titres than that experienced received only one vaccination [15]. Another study KIAA0700 carried out in Thailand suggested that one dose of tissue tradition vaccine in dogs is not adequate to keep up rabies neutralizing antibody titre?in serum for 1?yr [16]. It is important to know whether dogs inside a representative human population (specially Sri Lankan local breed) possess antibody titres above the protecting level (higher than 0.5?IU/ml about WHO recommendation) after the 1st vaccination and whether the antibody titres are maintained above the protective level until the time of.