Keyword search (4,163 papers available)

"morphology" Keyword-tagged Publications:

Title Authors PubMed ID
1 Morphological and Habitat Quality of Salmonid Streams and their Relationship with Fish-Based Indices in Aotearoa New Zealand and Ontario (Canada) Foote KJ; Biron PM; Grant JWA; 38172273
BIOLOGY
2 Olfaction and reaction: The role of olfactory and hypothalamic investment in the antipredator responses to chemical alarm cues by northern redbelly dace Joyce BJ; Brown GE; 37876646
BIOLOGY
3 Cervical muscle morphometry and composition demonstrate prognostic value in degenerative cervical myelopathy outcomes Naghdi N; Elliott JM; Weber MH; Fehlings MG; Fortin M; 37745653
PERFORM
4 Identification of the driving factors of microplastic load and morphology in estuaries for improving monitoring and management strategies: A global meta-analysis Feng Q; An C; Chen Z; Lee K; Wang Z; 37336353
ENCS
5 Bioreactor as the root cause of the "manganese effect" during Aspergillus niger citric acid fermentations Fekete E; Bíró V; Márton A; Bakondi-Kovács I; Németh Z; Sándor E; Kovács B; Fábián I; Kubicek CP; Tsang A; Karaffa L; 35992333
CSFG
6 A Deep Learning Approach to Capture the Essence of Candida albicans Morphologies Bettauer V; Costa ACBP; Omran RP; Massahi S; Kirbizakis E; Simpson S; Dumeaux V; Law C; Whiteway M; Hallett MT; 35972285
BIOLOGY
7 Preparation and Characterization of Eco-Friendly Transparent Antibacterial Starch/Polyvinyl Alcohol Materials for Use as Wound-Dressing Mohammad Mohsen Delavari 35744574
ENCS
8 Genetic Screening of Candida albicans Inactivation Mutants Identifies New Genes Involved in Macrophage-Fungal Cell Interactions Godoy P; Darlington PJ; Whiteway M; 35450285
PERFORM
9 Deletion of the Aspergillus niger Pro-Protein Processing Protease Gene kexB Results in a pH-Dependent Morphological Transition during Submerged Cultivations and Increases Cell Wall Chitin Content. van Leeuwe TM, Arentshorst M, Forn-Cuní G, Geoffrion N, Tsang A, Delvigne F, Meijer AH, Ram AFJ, Punt PJ 33276589
CSFG
10 Short-term Captivity Drives Hypothalamic Plasticity and Asymmetry in Wild-Caught Northern Red Bellied Dace (Chrosomus eos). Joyce BJ, Brown GE 32447778
BIOLOGY
11 Prefrontal Cortex and Multiparity in Lactation. Opala EA, Verlezza S, Long H, Rusu D, Woodside B, Walker CD 31437474
CSBN

 

Title:A Deep Learning Approach to Capture the Essence of Candida albicans Morphologies
Authors:Bettauer VCosta ACBPOmran RPMassahi SKirbizakis ESimpson SDumeaux VLaw CWhiteway MHallett MT
Link:pubmed.ncbi.nlm.nih.gov/35972285/
DOI:10.1128/spectrum.01472-22
Publication:Microbiology spectrum
Keywords:Candida albicansdeep learningfully convolutional one-stage object detectiongenerative adversarial networkmicroscopymorphology
PMID:35972285 Category: Date Added:2022-08-16
Dept Affiliation: BIOLOGY
1 Department of Computer Science and Software Engineering, Concordia Universitygrid.410319.e, Montreal, Quebec, Canada.
2 Department of Biology, Concordia Universitygrid.410319.e, Montreal, Quebec, Canada.
3 Department of Anatomy and Cell Biology, Western University, London, Ontario, Canada.
4 Centre for Microscopy and Cellular Imaging, Concordia Universitygrid.410319.e, Montreal, Quebec, Canada.
5 Department of Biochemistry, Western University, London, Ontario, Canada.

Description:

We present deep learning-based approaches for exploring the complex array of morphologies exhibited by the opportunistic human pathogen Candida albicans. Our system, entitled Candescence, automatically detects C. albicans cells from differential image contrast microscopy and labels each detected cell with one of nine morphologies. This ranges from yeast white and opaque forms to hyphal and pseudohyphal filamentous morphologies. The software is based upon a fully convolutional one-stage (FCOS) object detector, a deep learning technique that uses an extensive set of images that we manually annotated with the location and morphology of each cell. We developed a novel cumulative curriculum-based learning strategy that stratifies our images by difficulty from simple yeast forms to complex filamentous architectures. Candescence achieves very good performance (~85% recall; 81% precision) on this difficult learning set, where some images contain hundreds of cells with substantial intermixing between the predicted classes. To capture the essence of each C. albicans morphology and how they intermix, we used a second technique from deep learning entitled generative adversarial networks. The resultant models allow us to identify and explore technical variables, developmental trajectories, and morphological switches. Importantly, the model allows us to quantitatively capture morphological plasticity observed with genetically modified strains or strains grown in different media and environments. We envision Candescence as a community meeting point for quantitative explorations of C. albicans morphology. IMPORTANCE The fungus Candida albicans can "shape shift" between 12 morphologies in response to environmental variables. The cytoprotective capacity provided by this polymorphism makes C. albicans a formidable pathogen to treat clinically. Microscopy images of C. albicans colonies can contain hundreds of cells in different morphological states. Manual annotation of images can be difficult, especially as a result of densely packed and filamentous colonies and of technical artifacts from the microscopy itself. Manual annotation is inherently subjective, depending on the experience and opinion of annotators. Here, we built a deep learning approach entitled Candescence to parse images in an automated, quantitative, and objective fashion: each cell in an image is located and labeled with its morphology. Candescence effectively replaces simple rules based on visual phenotypes (size, shape, and shading) with neural circuitry capable of capturing subtle but salient features in images that may be too complex for human annotators.




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