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Clinical metagenomics-based diagnostics for infectious diseases
Clinical metagenomics is an emerging method in the diagnosis of infectious diseases that uses next generation sequencing (NGS) technology to identify the etiologic agents to allow for more effective and targeted treatment of infectious diseases. Conventional diagnostic methods are mainly based on basic morphologic, phenotypic and genotypic analyses which can be insensitive and/or time consuming. Metagenomic NGS (mNGS) can be performed with only a small amount of nucleic acid from the specimen and not only can the pathogen be identified and characterized, but also its antimicrobial susceptibility can be inferred. Although tremendous advancements were made in the speed, throughput, and cost of NGS in recent years, the application of clinical metagenomics in routine diagnosis of infectious diseases is not yet practical because of its much higher cost compared to conventional microbiological tests, complex laboratory workflows and computational challenges.
Immunobiology of Leishmaniasis
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Toxoplasma Gondii Host Interactions: A Story of Immune Attack and Parasite Counterattack
Toxoplasma gondii is an obligate intracellular parasite that can infect all warm-blooded animals, including an estimated ~30% of humans. It can cause severe disease in immune-suppressed individuals and in fetuses as well as blinding chorioretinitis in adults and children. Toxoplasma-innate immune system interactions determine early parasite control and activation of the adaptive immune system by the host and are therefore critical in determining host survival during the acute phase of infection. However, induction of an exaggerated inflammatory response can also lead to pathology. Only the chronic tissue cyst form of Toxoplasma is orally infectious. It is therefore critical for the parasiteâ...
Host-parasite interactions at the cellular, tissue, and organism level
Protozoan and helminth parasites infect animals and humans and cause debilitating pathologies that cause a variety of morbidities and deaths worldwide. The ability of parasites to establish infection and cause disease in mammalian hosts is a result of a series of intricate mechanisms evolved by parasitic species to confront and evade the host's defensive responses, along with the ability to use the host’s metabolic and catabolic processes and host cellular organelles to their benefit. For instance, parasites may have predilection sites in the host that are not accessible to immune effector molecules and mechanisms, may acquire host-derived "masking" molecules, can vary their surface molecu...
Immunity to Malaria and Vaccine Strategies
Malaria, caused by infection with protozoan parasites belonging to the genus Plasmodium, is a highly prevalent and lethal infectious disease, responsible for 435,000 deaths in 2017. Optimism that malaria was gradually being controlled and eliminated has been tempered by recent evidence that malaria control measures are beginning to stall and that Plasmodium parasites are developing resistance to front-line anti-malarial drugs. An important milestone has been the recent development of a malaria vaccine (Mosquirix) for use in humans, the very first against a parasitic infection. Unfortunately, this vaccine has modest and short-lived efficacy, with vaccinated individuals possibly being at incre...
