Evidence suggests that many Ebola infections are asymptomatic, a factor overlooked by recent outbreak summaries and projections. Particularly, results from one post-Ebola outbreak serosurvey showed that 71% of seropositive individuals did not have the disease; another study reported that 46% of asymptomatic close contacts of patients with Ebola were seropositive. Although asymptomatic infection...

Processed antigen reacts selectively with lymphocytes bearing .appropriate surface immunoglobulin molecules resulting in the clonal proliferation of these cells, produc­ing circulating immunoglobulin (humoral immunity) or non-circulating immunoglobulins (cellular immunity).  High levels of circulating immunoglobulins (lgM & lgG) occur in protozoa and helminths infections. Reaginic antibodies a...

Immunity to diseases is conferred by pathogen-specific memory cells that prevent disease reoccurrences. A broad repertoire of memory T-cells must be developed and maintained to effectively protect against viral invasions; yet, the total number of memory T-cells is constrained between infections. Thus, creating memory to new infections can require attrition of some existing memory cells. Further...

Innate immunity has a key role in the control of microbial infections in both vertebrates and invertebrates. In insects, including vectors that transmit parasites that cause major human and animal diseases, antimicrobial peptides (AMPs) are important components of innate immunity. AMPs are induced upon parasitic infections and can participate in regulating parasite development in the digestive ...

Humoral and cell-mediated immune responses to varicella-zoster (V-Z) virus were assessed in patients during and after V-Z infections. Ongoing V-Z infections was associated with minimal cellular immunity but not necessarily with poor humoral immunity. Recovery from V-Z infection was associated with a vigorous cellular immune response. Cell-mediated immunity to V-Z virus was demonstrable for year...

Abstract Background and Aims: Medical students are exposed to various infectious diseases during their clinical training period, including measles and rubella. In Iran, to control the outbreaks of measles and rubella a mass vaccination campaign was conducted on 2003. The present investigation evaluates Immunity to measles and rubella in a group of Babol medical students and determines the ...

objective: medical students are exposed to various infectious diseases during their clinical training period, including measles and rubella. in iran, to control the outbreaks of measles and rubella a mass vaccination campaign was conducted on 2003. the present investigation evaluates immunity to measles and rubella in a group of babol medical students and determines the prevalence of medical st...

Given the scope of the worldwide health problems caused by the acquired immunodeficiency syndrome, tuberculosis, and malaria, it is imperative that vaccines be developed to prevent these infections. Recent advances in the understanding of these diseases suggest that T-lymphocyte-mediated immunity is important in containing these infections. The application of novel vaccine technologies for elic...