Gregory R. McCracken
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View article: Assessing the potential for specimen pooling to streamline nosocomial surveillance of methicillin-resistant <i>Staphylococcus aureus</i> (MRSA)
Assessing the potential for specimen pooling to streamline nosocomial surveillance of methicillin-resistant <i>Staphylococcus aureus</i> (MRSA) Open
In hospitals, identification of methicillin-resistant Staphylococcus aureus (MRSA) is important to reduce possible transmissions and serious outcomes. Traditional culture and susceptibility testing requires 48–72 h, whereas Xpert MRSA poly…
View article: The genomic consequences of fisheries collapse in a marine fish
The genomic consequences of fisheries collapse in a marine fish Open
The loss of genetic diversity during a population collapse may have important implications for fisheries management and conservation. However, the identification of the underlying changes to genetic diversity can be challenging. The 1990s …
View article: Life history implications of kinship structure in an Atlantic herring aggregation
Life history implications of kinship structure in an Atlantic herring aggregation Open
Kinship in natural marine fish systems has been little explored especially for very abundant and commercially exploited marine fish with broadcast spawning. Recent advances in genomics have however facilitated an improved understanding of …
View article: Pathological investigation and microbiological confirmation of Bartonella quintana endocarditis: A case of trench fever without the trench or fever
Pathological investigation and microbiological confirmation of Bartonella quintana endocarditis: A case of trench fever without the trench or fever Open
View article: Temporal Variability in Effective Size (Ne) Identifies Potential Sources of Discrepancies Between Mark Recapture and Close Kin Mark Recapture Estimates of Population Abundance
Temporal Variability in Effective Size (Ne) Identifies Potential Sources of Discrepancies Between Mark Recapture and Close Kin Mark Recapture Estimates of Population Abundance Open
Although efforts to estimate effective population size, census size and their ratio in wild populations are expanding, few empirical studies investigate interannual changes in these parameters. Hence, we do not know how repeatable or repre…
View article: The genomic consequences of fisheries collapse in a marine fish
The genomic consequences of fisheries collapse in a marine fish Open
View article: Southern marsh deer (Blastocerus dichotomus) populations assessed using Amplicon Sequencing on fecal samples
Southern marsh deer (Blastocerus dichotomus) populations assessed using Amplicon Sequencing on fecal samples Open
View article: Temporal variability in effective size (N _e) identifies sampling bias in close kin mark recapture estimate of population abundance (Nc(CKMR))
Temporal variability in effective size (N _e) identifies sampling bias in close kin mark recapture estimate of population abundance (Nc(CKMR)) Open
Although efforts to estimate Ne, Nc, and their ratio in wild populations are expanding, few empirical studies investigate interannual changes in these parameters. Hence, we do not know how representative many estimates may be. Answering th…
View article: Taqman PACMAN: a simple molecular approach for positive rapid antigen test confirmation during periods of low prevalence
Taqman PACMAN: a simple molecular approach for positive rapid antigen test confirmation during periods of low prevalence Open
Antigen-based rapid diagnostic tests (Ag-RDTs) were widely deployed to enhance SARS-CoV-2 testing capacity during the COVID-19 pandemic. Consistent with national guidance for low prevalence settings, positive Ag-RDTs were confirmed using n…
View article: Real-world evaluation of the Lucira Check-It COVID-19 loop-mediated amplification (LAMP) test
Real-world evaluation of the Lucira Check-It COVID-19 loop-mediated amplification (LAMP) test Open
In hospitals during the COVID-19 pandemic, laboratory testing was important to reduce SARS-CoV-2 transmissions, particularly for high-risk settings like the emergency department and pre-operative settings and for the safe return to work of…
View article: Epigenetic patterns in Atlantic herring (<i>Clupea harengus</i>): Temperature and photoperiod as environmental stressors during larval development
Epigenetic patterns in Atlantic herring (<i>Clupea harengus</i>): Temperature and photoperiod as environmental stressors during larval development Open
Understanding the molecular mechanisms underlying individual responses to environmental changes is crucial for species conservation and management. Pelagic fishes including Atlantic herring ( Clupea harengus ) are of particular interest be…
View article: Neglected SARS-CoV-2 variants and potential concerns for molecular diagnostics: a framework for nucleic acid amplification test target site quality assurance
Neglected SARS-CoV-2 variants and potential concerns for molecular diagnostics: a framework for nucleic acid amplification test target site quality assurance Open
During the COVID-19 pandemic, SARS-CoV-2 detection using nucleic acid amplification tests (NAATs) played a key role in clinical management and public health interventions. However, mutations could jeopardize NAAT-based detection if they oc…
View article: Geography, environment, and colonization history interact with morph type to shape genomic variation in an Arctic fish
Geography, environment, and colonization history interact with morph type to shape genomic variation in an Arctic fish Open
Polymorphic species are useful models for investigating the evolutionary processes driving diversification. Such processes include colonization history as well as contemporary selection, gene flow, and genetic drift, which can vary between…
View article: Hunting for mpox (monkeypox) mimickers: Use of the Biofire meningitis/encephalitis panel on lesion swabs to support alternative viral diagnoses
Hunting for mpox (monkeypox) mimickers: Use of the Biofire meningitis/encephalitis panel on lesion swabs to support alternative viral diagnoses Open
View article: Commerson’s dolphin population structure: evidence for female phylopatry and male dispersal
Commerson’s dolphin population structure: evidence for female phylopatry and male dispersal Open
View article: Demographic resilience of brook trout populations subjected to experimental size‐selective harvesting
Demographic resilience of brook trout populations subjected to experimental size‐selective harvesting Open
Sustainable management of exploited populations benefits from integrating demographic and genetic considerations into assessments, as both play a role in determining harvest yields and population persistence. This is especially important i…
View article: Avoiding False-Positive SARS-CoV-2 Rapid Antigen Test Results with Point-of-Care Molecular Testing on Residual Test Buffer
Avoiding False-Positive SARS-CoV-2 Rapid Antigen Test Results with Point-of-Care Molecular Testing on Residual Test Buffer Open
During the COVID-19 pandemic, rapid antigen tests have been widely used for the detection of SARS-CoV-2. These simple devices allow rapid test results.
View article: Combined oropharyngeal/nares and nasopharyngeal swab sampling remain effective for molecular detection of SARS-CoV-2 Omicron variant
Combined oropharyngeal/nares and nasopharyngeal swab sampling remain effective for molecular detection of SARS-CoV-2 Omicron variant Open
The world has experienced several waves of SARS-CoV-2 variants of concern (VoCs) throughout the COVID-19 pandemic since the first cases in December 2019. The Omicron VoC has increased transmission, compared to its predecessors, and can pre…
View article: Avoiding false positive SARS-CoV-2 rapid antigen test results with point-of-care molecular testing on residual test buffer
Avoiding false positive SARS-CoV-2 rapid antigen test results with point-of-care molecular testing on residual test buffer Open
Objectives Antigen-based rapid diagnostic tests (Ag-RDTs) have been widely used for the detection of SARS-CoV-2 during the Covid-19 pandemic. In settings of low disease prevalence, such as asymptomatic community testing, national guideline…
View article: Combined oropharyngeal/nares and nasopharyngeal swab sampling remain effective for molecular detection of SARS-CoV-2 Omicron variant
Combined oropharyngeal/nares and nasopharyngeal swab sampling remain effective for molecular detection of SARS-CoV-2 Omicron variant Open
Summary The world has experienced several waves of SARS-CoV-2 variants of concern (VoCs) throughout the COVID-19 pandemic since the first cases in December 2019. The Omicron VoC has increased transmission, compared to its predecessors, and…
View article: The Genomic Consistency of the Loss of Anadromy in an Arctic Fish (<i>Salvelinus alpinus</i>)
The Genomic Consistency of the Loss of Anadromy in an Arctic Fish (<i>Salvelinus alpinus</i>) Open
The potentially significant genetic consequences associated with the loss of migratory capacity of diadromous fishes that have become landlocked in freshwater are poorly understood. Consistent selective pressures associated with freshwater…
View article: Low STR variability in the threatened marsh deer, Blastocerus dichotomus, detected through amplicon sequencing in non-invasive samples
Low STR variability in the threatened marsh deer, Blastocerus dichotomus, detected through amplicon sequencing in non-invasive samples Open
Blastocerus dichotomus is the largest deer in South America. We have used 25 microsatellite markers detected and genotyped by Next Generation Sequencing to estimate the genetic variability of B. dichotomus in Argentina, where most of its p…
View article: Low STR variability in the threatened marsh deer, Blastocerus dichotomus, detected through amplicon sequencing in non-invasive samples
Low STR variability in the threatened marsh deer, Blastocerus dichotomus, detected through amplicon sequencing in non-invasive samples Open
Blastocerus dichotomus is the largest deer in South America. We have used 25 microsatellite markers detected and genotyped by Next Generation Sequencing to estimate the genetic variability of B. dichotomus in Argentina, where most of its p…
View article: Population abundance in arctic grayling using genetics and close‐kin mark‐recapture
Population abundance in arctic grayling using genetics and close‐kin mark‐recapture Open
Arctic Grayling ( Thymallus arcticus ) are among the most widely distributed and abundant freshwater fish in the Yukon Territory of Canada, yet little information exists regarding their broad and fine‐scale population structures or the num…
View article: Multiple drainage reversal episodes and glacial refugia in a Patagonian fish revealed by sequenced microsatellites
Multiple drainage reversal episodes and glacial refugia in a Patagonian fish revealed by sequenced microsatellites Open
The rise of the southern Andes and the Quaternary glacial cycles influenced the landscape of Patagonia, affecting the phylogeographic and biogeographic patterns of its flora and fauna. Here, we examine the phylogeography of the freshwater …
View article: Human‐induced habitat fragmentation effects on connectivity, diversity, and population persistence of an endemic fish, <i>Percilia irwini</i>, in the Biobío River basin (Chile)
Human‐induced habitat fragmentation effects on connectivity, diversity, and population persistence of an endemic fish, <i>Percilia irwini</i>, in the Biobío River basin (Chile) Open
An understanding of how genetic variability is distributed in space is fundamental for the conservation and maintenance of diversity in spatially fragmented and vulnerable populations. While fragmentation can occur from natural barriers, i…
View article: First records of Finescale Dace (<i>Chrosomus neogaeus</i>) in Newfoundland and Labrador, Canada
First records of Finescale Dace (<i>Chrosomus neogaeus</i>) in Newfoundland and Labrador, Canada Open
The island of Newfoundland has no official record of cyprinid fishes. Here, we report the discovery of a minnow, Finescale Dace (Chromous neogaeus) from four ponds located in a first order tributary of the Exploits River, in central Newfou…
View article: Validation of close‐kin mark–recapture (CKMR) methods for estimating population abundance
Validation of close‐kin mark–recapture (CKMR) methods for estimating population abundance Open
Knowing how many individuals there are in a population is a fundamental problem in the management and conservation of freshwater and marine fish. We compare abundance estimates (census size, N c ) in seven brook trout Salvelinus fontinalis…
View article: Extensive secondary contact among three glacial lineages of Arctic Char ( <i>Salvelinus alpinus</i> ) in Labrador and Newfoundland
Extensive secondary contact among three glacial lineages of Arctic Char ( <i>Salvelinus alpinus</i> ) in Labrador and Newfoundland Open
Aim The Pleistocene glaciation event prompted the allopatric divergence of multiple glacial lineages of Arctic char ( Salvelinus alpinus ), some of which have come into secondary contact upon their recolonization of the Holarctic. While th…
View article: Extensive Secondary Contact Among Three Glacial Lineages of Arctic Char (<i>Salvelinus alpinus</i>) in Newfoundland and Labrador
Extensive Secondary Contact Among Three Glacial Lineages of Arctic Char (<i>Salvelinus alpinus</i>) in Newfoundland and Labrador Open
We sequenced a portion of the D-loop region in over 1000 Arctic char ( Salvelinus alpinus ) samples from 67 locations across Newfoundland and Labrador to assess the extent of secondary contact among the Arctic, Atlantic, and Acadian glacia…