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The aim of the present study was to identify the true extent of the non-responsiveness in infants born from HBsAg-negative mothers, vaccinated against Hepatitis B Virus (HBV) at birth. Sixty-four non- and low-responding infants, selected from an initial cohort of 2009, were given two additional doses of recombinant HBV vaccine between the tenth and the twelfth month of age. A parallel evaluation...
An expression genomic library of Trypanosoma cruzi (T. cruzi) constructed using pcDNA3 plasmid was used for the immunisation (25 μg) of Balb/c mice. Expression of T. cruzi antigens in the muscle of inoculated mice was detected by indirect immunofluorescence 7 days after immunisation. Specific IgG antibodies were significatively increased (P < 0.05) in animals that were reimmunised with 50 μg of...
Mice were intranasally immunised with a mixture of Bordetella pertussis filamentous haemagglutinin (FHA) and recombinant pertussis toxin, PT-9K/129G (rPT) in combination with chitosan. For both antigens, this formulation induced systemic responses as measured by serum IgG and also mucosal responses as measured by secretory IgA in lung lavage and nasal washes. Immunosorbant assays were used to measure...
This study assessed the safety of inactivated Mycobacterium vaccae as a candidate vaccine to prevent disseminated mycobacterial disease in children with HIV infection. 35 children ages 1-8 with CD4 counts =<300/mm 3 in New Hampshire, Boston and Chicago were randomised in a 2:1 schedule to receive a 3-dose series of intradermal M. vaccae vaccine (MV) or hepatitis B vaccine (HBV) at 2-month...
Hong Kong is a well developed city in the center of an endemic region for hepatitis A. The age at which hepatitis A occurs has shifted from childhood and adolescence to adults like many western countries. There is a high chance of outbreaks with the introduction of infection from neighbouring countries. Reducing the susceptibility of a population by vaccination can eliminate the diseases but updated...
Immunisation against Helicobacter infection in mouse models has thus far produced neither complete protection against the bacteria, nor a complete prevention of the associated gastritis. This study aimed firstly to compare the sensitivities of the various methods used to assess H. pylori infection in the mouse model, and secondly to develop the experimental design to induce a more effective immunity,...
The aims of this project were: (1) to determine the extent to which infant hepatitis B immunisation is preventing chronic hepatitis B infection in children living in a sample of Pacific Island countries; and (2) to identify factors associated with the successful prevention of hepatitis B infection in these populations. A regional hepatitis B immunisation project which supplied hepatitis B vaccine...
The major challenge in the development of anti-schistosome vaccines is to use defined antigens to stimulate an appropriate immune response that leads to resistance. Several promising candidate vaccine antigens including the glycolytic enzyme triose-phosphate isomerase (SmTPI), a 28 kDa glutathione-S-transferase (Sm28), the myofibrilar protein paramyosin (Sm97), an integral membrane protein (Sm23)...
A total of 242 healthy adults were immunised with a first dose of an investigational inactivated hepatitis A vaccine. Three concentrations (3, 6 and 12 EU [ELISA units]) of the experimental vaccine were used and compared to a licensed reference vaccine. The aim was to determine the antigenic concentration of the study vaccine inducing the highest seroconversion rate and anti-Hepatitis A virus (HAV)...
Although vaccination against Streptococcus pneumoniae (S. pneumoniae) and Haemophilus influenzae type b (Hib) is recommended for immunocompromised patients, such as patients with B-cell chronic lymphocytic leukaemia (B-CLL), its protective effect is questionable. We studied antibody responses to pneumococcal polysaccharide vaccine (Pneumovax-23(R)) and to conjugated H. influenzae type b-vaccine (Act-Hib(R))...
Inflammation is essential to repair tissue damaged by physical, microbial or allergic mechanisms. Inappropriately zealous responses lead to destructive pathology or chronic disease cycles, whereas ideal outcomes are associated with complete and rapid restoration of tissue structure and function. The establishment of a rodent model investigating the different immune responses to non-typeable Haemophilus...
In the eight years since the Global Advisory Group of the Expanded Program on Immunisation set 1997 as the target for integrating hepatitis B (HB) vaccination into national immunisation programs world-wide, more than 116 countries have included HB vaccine as part of their routine infant or adolescent immunisation programs. Meanwhile, many countries have performed economic evaluation studies, while...
Vaccines have prevented more deaths, disability and suffering than any other medical discovery or intervention. Recent breakthroughs in immunology and genomics offer the prospect of the development of many new prophylactic and therapeutic vaccines not only against infectious diseases but also for use in conditions such as allergy, autoimmunity and carcinogenesis where malfunction of the immune system...
Vaccinations are one of the most effective preventive procedures in modern medicine. However, earlier studies have indicated that homoeopathic physicians do not recommend or apply vaccinations as frequently as their allopathic colleagues. Few studies have been undertaken to clarify this question and most of these have not distinguished between medically and non-medically qualified homoeopathic practitioners...
Over the last decades, tremendous efforts have been made to strengthen childhood immunisation programs. However, the burden of influenza and pneumococcal infections remains disturbingly high in adults and elderly. We conducted a cross-sectional self-administered mail survey to identify characteristics associated with low use of recommended vaccines in adult patients attending routine primary care...
The gene encoding the Plasmodium yoelii homologue of P. falciparum merozoite surface proteins 4 (MSP4) and 5 (MSP5) has been expressed in Escherichia coli and Saccharomyces cerevisiae. The protein contains a single epidermal growth factor (EGF)-like domain and is expressed in a form lacking the predicted N-terminal signal and glycosyl phosphatidylinositol (GPI) attachment sequences. The recombinant...
Complementary and alternative medicine (CAM) has become a popular form of healthcare and the predictions are that, it will increase further. The reasons for this level of popularity are highly diverse, and much of the motivation to turn to CAM pertains to a deeply felt criticism of mainstream medicine - many people (are led to) believe that conventional interventions, including immunisation, are associated...
Assuming that the level of Bacille Calmette Guerin (BCG) coverage gives a measure of access to immunisation services, it is possible to derive what fraction of infants are not immunised against measles due to under-utilisation of existing services (rather than unavailability of services). According to the most recent official statistics, the overall coverage for measles vaccine is 53% in Africa (10%...
Pertussis vaccination of infants has dramatically reduced disease, complications and deaths in infancy and early childhood. But there is still a major public health challenge — to deal with the morbidity and economic burden of illness in older children, adolescents and adults. Furthermore, it is these groups that form a major source of infection for non-immunised and partially immunised infants who...
The use of vaccines for the prophylaxis of influenza in children is limited. This is despite high annual rates of influenza in children and despite the complications caused by influenza in children with chronic respiratory illnesses. The disease burden of influenza on infants and young children is reviewed and the potential of recommended influenza vaccination in healthy children, to reduce the direct...
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