Related Experiment Video
Updated: May 8, 2025

06:22
A Precise and Autonomous System for the Detection of Insect Emergence Patterns
Published on: January 9, 2019
5.6K
The Emergence of Streptococcus gallolyticus as a Pathogen in Turkeys
LaTasha S Gray1, Timothy J Johnson2, Kabel M Robbins3
1Department of Poultry Science, University of Arkansas, Fayetteville, AR 72704.
Avian Diseases
|April 18, 2025
Summary
Streptococcus gallolyticus, previously Streptococcus bovis, is an emerging poultry pathogen causing sudden deaths in young turkeys. Virulence may stem from accessory genome elements, necessitating further study.
Area of Science:
- Veterinary Microbiology
- Poultry Pathology
- Bacterial Pathogenesis
Background:
- Streptococcus gallolyticus (formerly Streptococcus bovis) is a Gram-positive bacterium.
- Once considered commensal, it's now recognized as a pathogen in humans and animals.
- Emerging as a significant threat in the poultry industry, especially turkeys.
Purpose of the Study:
- To review the nomenclature changes of Streptococcus gallolyticus.
- To discuss the identification and emergence of S. gallolyticus in turkeys.
- To highlight its role as an emerging poultry pathogen.
Main Methods:
- Literature review on Streptococcus gallolyticus.
- Analysis of epidemiological data regarding infections in turkeys.
- Examination of proposed virulence factors.
Main Results:
- S. gallolyticus causes acute mortality in turkey poults (1.5-2.5 weeks old).
- Infections are prevalent in the southern US during July and August.
- Virulence is potentially linked to accessory genome components.
Conclusions:
- S. gallolyticus is a significant emerging pathogen in turkeys.
- Understanding its emergence and virulence factors is crucial for poultry health.
- Further research into accessory genomes may reveal control strategies.
Related Concept Videos
Eukaryotic Evolution
29.5K
The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
29.5K
Convergent Evolution
27.1K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
27.1K
The Evidence for Evolution
41.9K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
41.9K
Genetics of Speciation
18.7K
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
18.7K
Genome Size and the Evolution of New Genes
7.8K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
7.8K
Zygotic Development And Stem Cell Formation
5.0K
The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
5.0K

