Articles tagged with Parasites
A study by researchers at the University of Illinois found that male cowbirds exhibit greater variation in offspring production, conforming to Bateman's Principle. Surprisingly, approximately 75% of cowbirds were monogamous for the entire breeding season despite not providing food or resources to their young.
An international study used human retinal cells to demonstrate how the Toxoplasma parasite creates a distinctive eye lesion. Researchers identified proteins produced from infected cells that push neighboring uninfected cells to overgrow and create a characteristic lesion.
A unique partnership between an engineer and a scientist challenged prevailing wisdom about Toxoplasma gondii's behavior, revealing potential targets for treatment. The team's work showed that parasites are actively replicating with complex patterns, forcing a reconsideration of the parasite's life cycle.
Scientists have made a breakthrough in understanding the construction of mitochondrial ribosomes, also known as mitoribosomes, which are crucial for protein synthesis. The study reveals that these structures undergo multiple assembly steps involving various proteins and machinery.
A new pantothenamide molecule, closely resembling a naturally occurring compound in malaria parasites, has shown promising results as a potential cure for the disease. Laboratory models suggest a single dose of the candidate drug may completely cure malaria, making it an attractive alternative to existing treatments.
A 150-million-year-old coral reef snapshot reveals a peak of diversity among marine animals, including fish, crabs, and snails. The study also finds evidence of parasites among these ancient creatures, shedding light on the complex ecosystems of the past.
Researchers have designed a new class of modified pantothenamides that stop malaria parasites from replicating in humans and preventing transmission to mosquitoes. These compounds are effective against malaria parasites resistant to currently available drugs.
Research reveals that Toxoplasma gondii's mother cells share micronemal proteins with daughters during asexual reproduction. This recycling mechanism enables the reassembly of vital organelles for parasite propagation.
Researchers have identified a peptide from an Antarctic sponge that shows promise as a lead for new therapies against malaria. The compound, friomaramide, effectively blocked the development of the malaria parasite in liver cells without harming them.
Scientists have discovered that the Trypanosoma cruzi parasite, responsible for Chagas disease, can reproduce sexually after analyzing its genomic code in unprecedented detail. The study reveals that some groups of parasites exhibit high levels of sexuality, while others remain abstinent.
A study published in Immunity identified a biomarker for predicting malaria infection severity, with increased p53 activation associated with enhanced protection against fever and inflammation. The findings could lead to new strategies for dampening harmful inflammatory responses and identifying at-risk individuals.
Researchers at the University of Bristol have established a new model system using red blood cells grown in the laboratory to study malaria parasite invasion. They used CRISPR-Cas9 to edit the genome of immature cells, removing a protein critical for invasion and showing that reticulocytes generated from this edited line were completel...
Scientists discovered Toxascaris leonina roundworm eggs in ancient puma coprolite from the Catamarca Province, Argentina, dated between 16,570 and 17,000 years ago. The findings provide evidence of parasites infecting wild mammals before human arrival in the region.
University of Alberta researchers found a critical protein called PEX3 in the cells of a deadly infectious parasite, opening the door to less harmful treatment options for millions suffering from diseases. The discovery could lead to effective drug treatments that target and kill parasites without harming human hosts.
Researchers have created a detailed map of individual malaria parasite behavior, giving the highest resolution view of malaria parasite gene expression to date. The Malaria Cell Atlas presents possible targets for developing antimalarial drugs, vaccines, and transmission blocking strategies.
African malaria parasites exhibit distinct genetic features in different regions, sharing genes that confer resistance to antimalarial drugs. This study highlights the risk of multi-drug resistance compromising previous success in controlling malaria.
Researchers have created the first high-resolution atlas of malaria parasite gene expression, revealing new insights into gene function and regulation. The Malaria Cell Atlas provides potential targets for future treatments and a better understanding of the spread of drug resistance.
Researchers discovered that Toxoplasma gondii requires linoleic acid to complete its sexual phase of life, a nutrient found at high levels in feline intestines. The finding may lead to the development of treatments to reduce the spread of toxoplasmosis from cats to humans.
A previously unrecognized species of medicinal leech has been discovered in North America, with specimens found in freshwater wetlands from Georgia to New York. The new species, Macrobdella mimicus, is less than 50 miles from the National Museum of Natural History and is closely related to other native leeches.
A study reveals that mosquitoes' salivary glands contain a barrier that blocks most malaria-causing parasites from being transmitted during a bite. Researchers found that only a few parasites can pass through a narrow opening in the 'chitin wall', potentially leading to new strategies for preventing malarial infection.
Researchers have developed nanovectors that can transport two drugs with different properties, improving their efficacy and delivery. The strategy targets the sexual phase of the parasite, reducing the emergence of antimalarial resistance.
Researchers identified key genes involved in parasite adherence using a non-disease-causing species Crithidia fasciculata. The study found significant transcriptional differences between the swimming and adherent forms of the parasite.
Researchers used parasitic bat flies to study buffy flower bat populations in the Bahamas, finding a single population of bats but two populations of their flies. The study suggests that ocean channels may not be universal barriers for bats, with limited gene flow over two years.
The study provides key insight into the parasites' lifestyle, which is more complex than previously thought. Dicyemids eliminate genes to conserve energy and change their reproductive methods, highlighting their unique genetic organization.
A new study reveals that American robins have a preference for using one eye over the other when looking at decoy eggs, with those who exhibit this bias being more successful at ejecting foreign eggs. This specialized ability is thought to be an adaptation to avoid brood parasites.
Research by UC Berkeley scientists shows that raising prawns in aquaculture systems can minimize tradeoffs between profit and disease reduction. Prawns feed on snails that transmit the parasite, reducing its burden to nearly zero after 10 years.
A study by the Drugs for Neglected Diseases Initiative found that nearly 60% of patients with PKDL passed on parasites to sandflies, which can then infect others. Early treatment of PKDL patients is crucial to prevent transmission of leishmaniasis in South Asia.
A study by the Wellcome Sanger Institute reveals that a multidrug-resistant malaria strain has spread aggressively across Southeast Asia, replacing local parasite populations in Vietnam, Laos, and northeastern Thailand. The resistant strain has picked up additional genetic changes, enhancing its resistance to treatment.
A multi-country randomized trial found that half of patients in Cambodia, Thailand, and Vietnam were not cured by first-line malaria treatment. The authors call for abandoning widely used drug combinations and adopting alternative treatments to prevent further development of multidrug-resistant malaria.
Research suggests that avian malaria may be behind London's dramatic decline in house sparrow populations, with nearly all birds carrying the parasite. Infection intensity varied significantly among colonies, with higher rates linked to younger birds and declining populations.
A recent study published in PLoS Neglected Tropical Diseases reveals that female Anopheles mosquitoes bite more often and have varied diets than previously assumed. The study also found that certain species of Anopheles mosquitoes, typically considered less important for malaria transmission, are infected with the Plasmodium parasite.
A recent study published in Proceedings of the National Academy of Sciences shows that mosquitoes employ a multi-stage immune response to combat malaria parasites, involving a complement-like pathway and phenoloxidases. This understanding could lead to opportunities to eliminate malaria parasites in the mosquito, reducing human cases.
A team of researchers has discovered a new way to target the unique metabolism of drug-resistant parasites, using a molecule called rhodoquinone. This approach could lead to the development of new drugs that selectively kill parasites without harming humans.
Researchers at LMU discovered that Toxoplasma gondii utilizes a previously unrecognized mode of motility, where it secretes membrane material and recycles it into the cell membrane through endocytosis. This process generates a 'fountain-like' flow of membrane material that contributes to the parasite's propulsion along the substrate.
A Duke University study identifies over 100 human genes co-opted by malaria parasites during the silent earlier stages of infection. This finding could lead to new treatments and prevent the disease from spreading.
Researchers found that malaria parasites develop faster in mosquitoes at lower temperatures than previously thought, increasing the risk of transmission to millions of people worldwide. The study suggests that even slight climate warming could lead to greater increases in transmission risk.
Toxoplasma gondii parasites replicate by hijacking the host cell's starvation response, extracting essential amino acids like arginine. This discovery suggests promising new drug targets to treat intracellular pathogens.
A new assay has been developed to detect patients' resistance to antimalarial drugs using whole blood, providing critical information quickly and efficiently in resource-limited settings. The technique eliminates DNA extraction steps, allowing for faster and more accurate assessment of genetic data associated with drug resistance.
A human liver cell protein called CXCR4 helps Plasmodium parasites develop into forms capable of infecting red blood cells. Targeting this protein may be a way to block the parasite's life cycle and prevent malaria development.
A study by the University of Exeter found that Varroa destructor mites indirectly increase infection rates among wild bumblebees by spreading deformed wing virus (DWV) through honeybee colonies. This highlights the need for beekeepers to treat their affected colonies.
Researchers at Clemson University have made significant progress in understanding the biology of Toxoplasma parasites, a human pathogen with high infection rates. By disrupting a key transporter, they were able to reduce the parasite's infectivity and provide insights into new targets for treatment.
Researchers have identified novel antigens on infected red blood cells that trigger natural human antibody responses, reducing malaria transmission. The discovery provides a promising alternative route for preventing disease spread and offers new leads for developing effective vaccines.
Researchers from Université Laval synthesized molecules discovered in a microscopic fungus from Nunavut, demonstrating their efficacy against malaria. The study found that the synthesized molecules, called mortiamides, stopped the growth of both parasite strains within 72 hours.
Klemens Engelberg has been awarded a $65,000 grant by the Knights Templar Eye Foundation to research the parasite Toxoplasma gondii. The funding will support his study of how the parasite divides and causes damage in human cells.
Research from Binghamton University finds that exposure to light at night can decrease hatching success in tadpoles and make them more susceptible to additional stressors like road salt pollution and parasites. The study suggests that combining light pollution with other stressors may have negative impacts on amphibian populations.
Beetles infected with intestinal parasites exhibit reduced aggressive behavior during simulated attacks from predators and rival males. Larger beetles tend to fight back more than smaller ones, while parasitized beetles produce fewer squeaks as a defensive behavior.
A new mathematical model developed at the University of Nebraska-Lincoln suggests that large collective of parasitic worms can kick-start a self-perpetuating cycle ensuring their survival. The study found that quantity of parasites alone determines whether they persist in a host, contrary to previous approaches.
Researchers found that sharing waters with an invasive Asian rockpool mosquito species reduces parasitism in native eastern tree-hole mosquito species, known as a dilution effect. The presence of the invasive species decreases parasite prevalence by 13-27% compared to 72-90% when kept alone.
Research reveals that pups with high hookworm infection rates spend more time in the water, whereas those with lower rates rest or avoid it. Climate change is thought to be a contributing factor, as warmer ocean temperatures lead to scarce fish supplies, forcing mothers to dedicate more time to searching for food.
Researchers at Kanazawa University found that inactivating the mosquito salivary protein AAPP significantly reduces mosquito feeding behavior, prolonging probing times and fluid excretion. This reduces egg production but does not affect malarial parasite development.
A new study sheds light on the metabolic shifts that occur during chronic asymptomatic malaria infection, which can help develop more effective detection and treatment methods.
Research found that nematode-infected horned passalus beetles process wood 15% faster than uninfected ones, leading to increased decomposition rates. The parasites are beneficial to the forest ecosystem, enabling the beetles to provide a more effective service
Researchers have identified a drug that can reverse hyperactivity induced by Toxoplasma gondii infection, reducing inflammation rather than parasite reduction. The study suggests the immune system plays a key role in behavioral changes caused by the parasite.
A new University of Connecticut study found that human activity influences the gut microbiota and body mass of Darwin's finches in the Galapagos. Researchers studied over 100 female finches and discovered that those living near humans had different gut bacteria communities, leading to changes in their physical characteristics.
A team of researchers at the Alfred Wegener Institute identified a parasite with functional mitochondria that produce energy without its own genetic material. The Amoebophrya ceratii parasite has nearly all metabolic processes working, allowing it to thrive on its own with significantly reduced genetic material.
Scientists at Lancaster University discovered that a late-acting T-helper 17 response helps eliminate Trichinella spiralis, a round worm and causative agent of Trichinosis. This response increases intestinal contraction and restoring IL-17 levels rescues mice's ability to expel the parasite.
Researchers have identified phosphodiesterase-B1 as a critical gene for the transmission of African sleeping sickness, a disease transmitted by tsetse flies. The study reveals that the parasite's movement from the fly's midgut to the salivary gland is controlled by this gene, providing new insights into the disease-causing mechanism.
A recent study found that invasive lizard populations can undergo significant biological changes, such as diverging morphology and increased forelimb length, to adapt to new territories. The researchers also discovered lower levels of parasite prevalence and higher body condition in introduced populations compared to native populations.
A new species of coral-dwelling parasite has been discovered, producing chlorophyll but not engaging in photosynthesis. The finding raises questions about the evolution and biology of this organism, which may hold clues to protecting coral reefs.
Researchers discovered an unconventional signaling pathway in Trypanosoma brucei, a parasite that causes sleeping sickness. The study identifies a new compound activator for protein kinase A (PKA), potentially leading to targeted therapies.