Results 41 to 50 of about 577,400 (301)

One problem, too many solutions: How costly is honest signalling of need?

open access: yesPLoS ONE, 2019
The "cost of begging" is a prominent prediction of costly signalling theory, suggesting that offspring begging has to be costly in order to be honest. Seminal signalling models predict that there is a unique equilibrium cost function for the offspring ...
Szabolcs Számadó   +2 more
doaj   +1 more source

Genetic characterization and passage instability of a novel hybrid virulence plasmid in a ST23 hypervirulent Klebsiella pneumoniae

open access: yesFrontiers in Cellular and Infection Microbiology, 2022
Hypervirulent variants of Klebsiella pnuemoniae (hvKP), which causes life-threatening infections, is a global priority pathogen and frequently harbours virulence plasmids. The virulence plasmids have emerged as the predominant vehicles carrying the major
Lin-Ping Fan   +13 more
doaj   +1 more source

Rationally designed Spot 42 RNAs with an inhibition/toxicity profile advantageous for engineering E. coli

open access: yesEngineering Reports, 2020
Bacterial regulatory small RNAs (sRNAs) have shown promise for gene knock‐down studies and metabolic engineering. However, some mRNAs might be difficult to target due to poor binding by the Hfq chaperone, individual synthetic sRNAs can have off‐target ...
Carolin Vogel   +5 more
doaj   +1 more source

Fitness cost of a mcr-1-carrying IncHI2 plasmid.

open access: yesPLoS ONE, 2018
IncHI2 is a common type of large mcr-1-carrying plasmids that have been found worldwide. Large plasmids could impose metabolic burden for host bacterial strains, we therefore examine the stability and fitness cost of a mcr-1-carrying 265.5-kb IncHI2 ...
Ke Ma, Yu Feng, Zhiyong Zong
doaj   +1 more source

Modelling and in vitro testing of the HIV-1 Nef fitness landscape. [PDF]

open access: yes, 2019
An effective vaccine is urgently required to curb the HIV-1 epidemic. We have previously described an approach to model the fitness landscape of several HIV-1 proteins, and have validated the results against experimental and clinical data.
Barton, John P   +9 more
core   +2 more sources

Reduced Fitness Costs of mcr-1.2 Compared to Mutated pmrB in Isogenic Colistin-Resistant KPC-3-Producing Klebsiella pneumoniae

open access: yesmSphere, 2019
In the present study, we provide the results of a detailed genomic analysis and the growth characteristics of a colistin-resistant KPC-3-producing Klebsiella pneumoniae sequence type 512 (ST512) isolate (the colR-KPC3-KP isolate) with a mutated pmrB and ...
Cesira Giordano   +7 more
doaj   +1 more source

Antiretroviral Drug-Resistance Mutations on the Gag Gene: Mutation Dynamics during Analytic Treatment Interruption among Individuals Experiencing Virologic Failure

open access: yesPathogens, 2022
We describe drug-resistance mutation dynamics of the gag gene among individuals under antiretroviral virologic failure who underwent analytical treatment interruption (ATI).
James R. Hunter   +7 more
doaj   +1 more source

Characterization of Fitness Cost Caused by Tigecycline-Resistance Gene tet(X6) in Different Host Bacteria

open access: yesAntibiotics, 2021
The emergence and prevalence of the tet(X) gene and its variants in the environment and in clinical settings constitute a growing concern for public health worldwide.
Lijie Jiang   +4 more
doaj   +1 more source

Fitness Cost of Resistance: Impact on Management [PDF]

open access: yes, 2015
Fungicides are important tools for the management of fungal diseases in many crops. But eventually, most fungicides fail because the treated pathogen population evolves resistance to the fungicide. This chapter focuses on how our knowledge of fitness costs associated with resistance informs strategies of fungicide deployment that help to avoid or delay
Alexey Mikaberidze, Bruce A. McDonald
openaire   +1 more source

Fitness costs of resistance to insecticides in insects

open access: yesFrontiers in Physiology, 2023
The chemical application is considered one of the most crucial methods for controlling insect pests, especially in intensive farming practices. Owing to the chemical application, insect pests are exposed to toxic chemical insecticides along with other stress factors in the environment. Insects require energy and resources for survival and adaptation to
Gul, Hina   +6 more
openaire   +4 more sources

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