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Related Concept Videos

Diversity of Protists I01:15

Diversity of Protists I

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Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
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Diversity of Protists II01:27

Diversity of Protists II

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Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
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Diversity of Protists IV01:27

Diversity of Protists IV

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Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
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Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

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Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
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Overview of Protists01:27

Overview of Protists

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Protists are diverse eukaryotic microorganisms that lack the specialized tissues of plants and animals and the chitinous cell walls of fungi. Their early divergence within Eukarya resulted in structural, functional, and ecological diversity. They are classified into supergroups such as Archaeplastida, Excavata, Amoebozoa, Rhizaria, Alveolata, and Stramenopiles, determined through genetic analysis and structural similarities.Structural and Functional AdaptationsProtists have various adaptations...
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Diversity of Protists III01:27

Diversity of Protists III

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Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
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Emerging Parasitic Protozoa.

Jacob Lorenzo-Morales1,2,3, José E Piñero1,2,3

  • 1Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna, Avda. Astrofísico Fco. Sánchez, S/N, La Laguna, Tenerife, 38203 Islas Canarias, Spain.

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Summary

Emerging and re-emerging infectious diseases are defined by their recent appearance or rapid increase in incidence and geographic range. Understanding these disease dynamics is crucial for public health surveillance and response.

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Area of Science:

  • Epidemiology
  • Infectious Diseases
  • Public Health

Background:

  • Emerging and re-emerging infectious diseases pose significant global health challenges.
  • These diseases are characterized by their novel appearance or resurgence in populations.
  • Changes in incidence and geographic distribution are key indicators.

Discussion:

  • The definition encompasses diseases that are new to a population or old diseases that are increasing.
  • Factors contributing to emergence include ecological, social, and demographic changes.
  • Surveillance systems are vital for early detection and characterization.

Key Insights:

  • A clear definition aids in disease tracking and classification.
  • Understanding the "emerging" and "re-emerging" spectrum is critical for targeted interventions.
  • Geographic range expansion highlights the impact of global connectivity and environmental factors.

Outlook:

  • Continued monitoring and research are essential for preparedness.
  • International collaboration is key to managing transboundary disease threats.
  • Developing robust public health strategies is paramount for mitigating future outbreaks.