Articles tagged with Parasites
The study reveals the malaria parasite's release mechanism from infected red blood cells, contradicting previous theories. The findings provide new insights into the disease and its potential targets for treatment.
An international team of scientists has discovered the gene PfRh4 that allows the malaria parasite to switch between potential invasion points on red blood cells. The inactivation of this single protein could block multiple entry points currently open to the parasite, paving the way for new anti-malarial vaccine designs.
Researchers have identified two genes that enable P. falciparum parasites to switch from sugar-dependent to sugar-independent invasion of red blood cells. The PfRh4 gene is required for this switching mechanism, which provides the parasite with adaptability in the face of receptor changes and immune system responses.
Researchers discovered a gene, PfRh4, that enables P. falciparum parasites to switch between two invasion pathways, increasing their adaptability in the face of immune responses and host changes. This finding has important implications for the design of anti-malaria vaccines.
A study found that mass treatment interventions in Uganda had no significant impact on reducing the prevalence of human infective T b rhodesiense parasites. Since 1998, over 428 new cases have been diagnosed in the Sorotic district, with an additional 300 cases likely going undiagnosed.
Researchers develop new method to detect sequestered malaria parasites in red blood cells. The study found that patients with severe malaria have six times higher parasite burden than those without severe symptoms.
Researchers discovered a new compound, LMP-420, that potently reduces activation of endothelial cells and inflammation in cerebral malaria. This finding offers a promising avenue for treating the condition, which has a high fatality rate despite existing treatments.
Researchers found that mosquitoes were significantly more attracted to children with infectious stages of malaria, whereas treatment with antimalarial drugs showed no difference in attractiveness.
A new canine vaccine has shown complete protection against visceral leishmaniasis in a successful trial, with laboratory experiments confirming the activation of immune cells to eliminate parasites. The vaccine uses antigen proteins excreted by the parasite and has potential for reducing transmission to humans.
Researchers found that parasitic fly larvae alter tiger moth caterpillar taste organs, favoring toxic plants containing protective chemicals. This change in behavior helps caterpillars escape parasites and survive.
Researchers found that parasite costs and virulence depend on the infection status of competitors, with infected individuals doing better when paired with an infected competitor. High prevalence of infection in a population means healthy larvae face less competition, leading to improved development and survival.
The genome sequences of Trypanosoma brucei, Trypanosoma cruzi, and Leishmania major have been completed, providing a blueprint for developing new drugs. The shared core of genes among the three parasites offers potential targets for a class of drugs that can target all three diseases.
Researchers at UGA have conducted the first global survey of protein expression in Trypanosoma cruzi, a parasite that causes Chagas disease. The study identified patterns of protein expression across the parasite's four lifecycle stages, providing new criteria for selecting vaccine targets and potential drug candidates.
The WEHI team will conduct research on parasite behavior, drug targets, and vaccine development to combat malaria and leishmaniasis. The ultimate goal is to prevent infection or reduce illness severity with effective treatments.
Eight Melbourne scientists, including six from WEHI, have been awarded five-year grants to tackle infectious and parasitic diseases like malaria. The $23.3 million international program aims to understand disease mechanisms, identify new drug targets, and develop vaccines.
A newly discovered invasive parasite is destroying the small sunbleak minnow's ability to spawn, potentially threatening freshwater ecosystem diversity and stability. The parasite, found in Asian gudgeon fish, causes near 100% failure in successful spawning, wiping out local populations over several generations.
A study by researchers at the University of Illinois found that intense selective logging changed the ecological balance for three primate species, leading to increased parasitic infections in red-tailed guenons. The monkeys experienced behavioral changes and reduced protein and vital mineral intake due to decreased food availability.
Researchers have made a groundbreaking discovery by directly observing the liver invasion of malarial parasites using intravital microscopy. The study reveals a critical stage in the parasite's life cycle, where sporozoites traverse Kupffer cells to wreak havoc on liver tissue.
A randomized trial in Uganda found a six-dose regimen of co-artemether significantly reduced gametocyte levels and mosquito infectivity. However, limitations include patient compliance and absorption issues.
Researchers developed disease models using yeast to test resistance to atovaquone and created a practical tool to design new anti-malarial drugs. This study provides the first quantitative explanation for malaria's drug resistance, enabling the development of new treatments within 3-5 years.
Scientists found that P. falciparum uses gene silencing to mask its presence by packaging DNA into tight forms and preventing expression. The study also revealed the role of protein SIR2 in this process, suggesting new avenues for developing novel drugs for malaria.
A recent study reveals the far-reaching impact of salmon farms on wild juvenile salmon, with sea lice infections increasing by 73 times near the farm and extending 30 km beyond. The research sheds light on the critical threat posed to dwindling wild salmon populations in British Columbia.
Dr. Brooks' research highlights the link between biodiversity decline and emerging human and wildlife diseases, such as West Nile Virus and avian flu. He argues that understanding parasite life cycles is crucial to preventing these diseases.
Scientists have identified key genes and gene regulation mechanisms in malaria parasites, which could lead to the development of new vaccines. The study's findings may help researchers understand when different genes switch on and off as the parasite metamorphoses through its complex life cycle.
Researchers at MIT used nanotechnology to study how malaria affects human blood cells, revealing new insights into the disease's impact. The study could lead to better treatments for malaria and other diseases by understanding how parasites affect cell behavior and function.
Researchers identified a subset of proteins vital to malaria parasite's survival in host red blood cells and a unique mechanism for protein export. This discovery allows for focus on key proteins for developing antimalarial drugs.
Scientists at Northwestern University have identified a signal on exported parasite proteins that enables the malaria parasite to target red blood cells. This discovery provides a new understanding of the complex mechanisms underlying malaria infection and offers promising leads for developing new treatments.
Researchers found that black-headed duck eggs are often rejected from host nests of red-gartered and red-fronted coot species, which employ defenses against their own species' brood parasites. This rejection is due to coots' adaptations to counter intraspecific brood parasitism, leaving the ducks evolutionarily stranded.
Indiana University researchers found that genes can move from plant parasites to host plants, establishing parasitism as a medium for horizontal gene transfer. The discovery complements previous findings showing the opposite process, and suggests that plant parasitism has been a key mechanism of gene exchange between species.
Researchers found that HIV-1 protease inhibitors, such as saquinavir and ritonavir, effectively inhibit P. falciparum growth and demonstrate anti-malarial activity. The study builds on previous findings of antiretroviral agents reducing parasite adhesion to endothelial surfaces.
Researchers found a specific region in the fly's gut wall where the parasite attaches and feeds on nutrients. This unique structure enables the parasite to survive and multiply within the insect host.
Scientists have created a genetically modified parasite to study the immune system's memory, which could aid in developing vaccines for Leishmania major, AIDS, and tuberculosis. Researchers found that central memory T cells remain primed to fight new infections even after initial infection has cleared.
A Rutgers-Newark scientist has found that mosquitoes may carry a lethal parasite called B. algerae, which can invade human muscle tissue and cause death. The parasite is typically found in the tissues of mosquitoes and can be transmitted to humans through mosquito bites.
Excess nitrogen and phosphorus from farming activities cause eutrophication, creating a food web that imperils frogs. A parasite, Ribeiroia ondatrae, infects tadpoles, causing deformities.
A laboratory-based study suggests that inadequate vaccines could lead to the emergence of more virulent malaria strains, potentially making them more dangerous to non-immunized populations. The research found that immunity accelerates the evolution of virulence in malaria parasites, even after mosquito transmission.
Researchers found that larger islands with more native parasites have weaker bird immune responses, making them ill-prepared for invasive infections. This study sheds light on how island populations respond to exotic disease introduction through human activities.
A study found that high nutrient levels lead to increased rams horn snail populations, which in turn cause more parasite infections and deformities in frogs. This research may help explain the recent increase in amphibian malformations and suggest control strategies.
Researchers found that a caterpillar's adaptation to a specific fruit's chemical composition allows it to survive without triggering the plant's defense mechanism, providing a stable food supply. This unique dietary preference also shields the caterpillar from parasites, enabling it to thrive in an otherwise hostile environment.
Researchers identified a plant-like enzyme, CDPK4, essential for malaria parasite transmission to mosquitoes. The findings provide a promising new target for developing safe and effective anti-malarial drugs.
Researchers have identified a new protein target for a universal childhood malaria vaccine, which causes infected red blood cells to stick inside blood vessels. This protein is expressed on the surface of red blood cells during severe childhood malaria but not during adult infections, making it an ideal candidate for vaccination.
Researchers have discovered two mosquito proteins, TEP1 and LRIM1, that kill the malaria parasite. Eliminating these proteins could block the parasite-mosquito cycle, potentially decreasing malaria prevalence.
Out-of-balance ecosystems play a significant role in the demise of amphibian populations. Human activities, parasites, and environmental changes are contributing factors. The research highlights the importance of managing landscapes and water bodies to prevent further declines.
Scientists have solved the puzzle of DHFR-TS, an enzyme needed by Cryptosporidium for reproduction. The study's results will help researchers design targeted drugs to combat the parasite and better understand related protozoan families.
Research reveals a significant rise in frog deformities over the past three decades, with a notable correlation to trematode parasites. Historically documented cases suggest an ongoing issue, while recent findings indicate increased occurrences and severity across more than 50 hotspots in North America.
A new delivery system uses short chains of arginine to ferry drugs across membranes and into cysts of Toxoplasma gondii, a single-celled microorganism that causes toxoplasmosis. The discovery opens the possibility of treating active and latent infections in the eye by applying a lotion containing triclosan.
The Institute for Genomic Research has released sequence data for the Trichomonas vaginalis parasite, which causes trichomoniasis and is linked to increased HIV transmission. The larger-than-expected genome holds promise for finding new treatments and prevention strategies.
Researchers identified a key process in malaria infection involving G proteins in red blood cells, which can be blocked with beta-blockers to prevent parasite entry. By targeting this process, new approaches for treating malaria may be developed using existing drugs.
A new study reveals that parasitic flatworms use light to locate hosts, while water temperature increases their swimming speed. The findings suggest that the larvae's movement is largely controlled by themselves rather than environmental factors.
A Leishmania mutant parasite has been developed to study persistent infections without triggering disease. The research may provide a breakthrough in understanding how the parasite interacts with the immune system, potentially leading to the development of a vaccine.
A recent study published in PLOS Biology tracked the genomic activity of Plasmodium falciparum in human red blood cells, revealing a surprisingly simple pattern of gene expression. This finding could lead to the identification of the biological function of unknown genes and provide new insights into the life cycle of malaria parasites.
Researchers engineered a strain of leishmania parasites without lipophosphoglycan, which increased their vulnerability to immune defenses. The findings could help develop new treatments for the deadly disease, affecting 12 million people worldwide.
Researchers identified a previously unknown protein-aldolase interaction that drives the parasite's movement into cells. This discovery may lead to the development of small molecules blocking this mechanism and treating diseases like toxoplasmosis and malaria.
A U.Va. researcher has made significant breakthroughs in treating the parasite that causes amebiasis, a disease responsible for millions of cases and deaths globally each year. The researcher's team developed an FDA-approved diagnostic test to improve diagnosis accuracy and a potential vaccine based on immunity in children.
Two studies found that invasive species have significantly fewer parasites than their native competitors, allowing them to outcompete and devastatingly impact native ecosystems. This advantage is due to the poor match between parasite hosts in new environments.
Research finds that invasive animals typically have fewer parasites in new habitats, allowing them to dominate native populations. This advantage is attributed to the lack of matched parasites, enabling introduced species to outcompete less fit native species.
A study published in Science reveals that Toxoplasma parasites can rapidly adapt to new hosts, allowing them to infect a wide range of animal species and spread worldwide. This discovery raises the possibility of other parasites undergoing similar changes, potentially presenting new threats of infection.
Researchers at the Texas Agricultural Experiment Station have discovered a promising new treatment for eliminating mistletoe from urban trees. The plant hormone has shown to be effective in controlling up to 90% of mistletoe infestations, with potential applications for widespread use across the United States.
A genetic variant in the NOS2 gene boosts nitric oxide levels, protecting against malaria disease. This trait explains why some people with malaria have mild symptoms and recover fully.
International collaboration sequences mosquito genome, revealing gene functions and immune system adaptations that help understand why only a few species transmit human malaria. The findings provide a head start for researchers to develop new therapies against the disease.
The sequencing of both P. falciparum and its insect vector heralds a new era in the fight against malaria. This detailed map of the parasite's 5,300 genes will enable investigators to design targeted anti-malarial drugs.