Host adaptation is the biological process by which a parasite, pathogen, commensal, or mutualistic organism undergoes genetic, phenotypic, and often behavioral changes that increase its fitness in association with a specific host species or host range. It typically involves selection on traits mediating host recognition, attachment, immune evasion, nutrient acquisition, and replication within host tissues or cells. Mechanistically, host adaptation may proceed through point mutations, gene gain or loss, regulatory rewiring, or horizontal gene transfer, and is shaped by host immune pressures, ecological context, and transmission routes, often leading to specialization, host shifts, or emergence of new host-specific lineages.
Despite decades of efforts to combat it, malaria remains a major global health threat. According to the World Health Organization's (WHO) 2025 World Malaria Report, about 282 million cases and approximately 610,000 deaths ...
Molecular & Computational biology
Apr 21, 2026
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Southern California is home to a flying black-and-yellow treasure. While commercial honeybee hives nationwide are collapsing under attack from deadly parasites, a unique hybrid bee found only in this part of the state has ...
Plants & Animals
Apr 10, 2026
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297
Bird flu—specifically H5N1—is no longer just a poultry problem in Asia. What started as a major United States outbreak, first in wildlife, then in poultry, and later in dairy cattle, is raising new concerns about food security, ...
Biotechnology
Apr 10, 2026
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15
Scientists have uncovered an unexpected microbial relationship that could help explain differences in the severity of a major disease affecting common beans. The discovery sheds light on how the pathogen evolves and may point ...
Ecology
Mar 30, 2026
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136
A new paper in Genome Biology and Evolution, indicates that while the COVID-19 virus has developed rapidly since 2019, it has done so within limited genetic channels. These genetic limits have remained unchanged. Despite ...
Evolution
Mar 25, 2026
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200
Scientists at the University of East Anglia (U.K.) have uncovered a hidden link between gut health and the immune system—all thanks to a tiny island bird. Researchers studied the Seychelles warbler, a small songbird found ...
Ecology
Mar 11, 2026
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Long before humans cultivated crops or sailed between continents, a group of plant viruses was already evolving among wild plants in Eurasia. According to a new international study published in Plant Disease, the ancestors ...
Evolution
Mar 9, 2026
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The Microbiology Society's Microbiology Outlooks, launched in 2025, has published its inaugural article: "When Theory Meets Genomics: Reconciling Game Dynamics and Within-Host Evolution." The new commentary explores how theoretical ...
Cell & Microbiology
Feb 28, 2026
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22
The preference of some mosquitoes in the Anopheles leucosphyrus (Leucosphyrus) group—including those that transmit malaria—for feeding on humans may have evolved in response to the arrival of early hominins in Southeast Asia ...
Evolution
Feb 26, 2026
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55
In a new study, published in Cell, researchers describe a newfound mechanism for creating proteins in a giant DNA virus, comparable to a mechanism in eukaryotic cells. The finding challenges the dogma that viruses lack protein ...
