Immunity in a Social Insect

@article{Rosengaus1999ImmunityIA,
  title={Immunity in a Social Insect},
  author={Rebeca B. Rosengaus and James F. A. Traniello and Tammy Chen and Julie J. Brown and Richard D. Karp},
  journal={Naturwissenschaften},
  year={1999},
  volume={86},
  pages={588-591}
}
Abstract Although pathogens appear to have exerted significant selective pressure on various aspects of sociality, mechanisms of disease resistance in the social insects are poorly understood. We report here on an immune response to infection by the dampwood termite, Zootermopsis angusticollis. Nymphs immunized with an injection of 7.6×107, 7.6×105, or 7.6×104 cells/ml glutaraldehyde-killed solution of the bacterium Pseudomonas aeruginosa had significantly higher survivorship than controls… 

The development of immunity in a social insect: Evidence for the group facilitation of disease resistance

TLDR
It is demonstrated that after a challenge exposure to the entomopathogenic fungus Metarhizium anisopliae, dampwood termites Zootermopsis angusticollis have higher survivorship when individuals develop immunity as group members, and termites significantly improve their ability to resist infection when they are placed in contact with previously immunized nestmates.

Disease prevention and resistance in social insects: modeling the survival consequences of immunity, hygienic behavior, and colony organization

TLDR
Cellular automata models suggest how infection control systems in social insects could have been built upon the inducible immune defenses and nest hygienic behaviors of solitary and presocial ancestors and served as important preadaptations to manage disease exposure and transmission in colonies of eusocial species.

Host Resistance to Bacterial Infection Varies Over Time, but Is Not Affected by a Previous Exposure to the Same Pathogen

TLDR
This multi-angled study supports the view that immune priming may require specific circumstances to occur, rather than it being a ubiquitous aspect of insect immunity.

Density and disease resistance in group-living insects: do eusocial species exhibit density-dependent prophylaxis?

TLDR
The results show that living in a high-density group did not significantly affect termite survivorship following challenge exposures to the entomopathogenic fungus Metarhizium anisopliae, and the innate immunological responses that are typically associated with the DDP of gregarious insects may be induced independent of nestmate density in eusocial species.

Natural variation in colony inbreeding does not influence susceptibility to a fungal pathogen in a termite

TLDR
These findings suggest that colony survival may rely more upon additional factors, such as different behavioral response thresholds or the influence of a specific genetic background, rather than the overall genetic diversity of the colony.

Saccharomyces cerevisiae Induces Immune Enhancing and Shapes Gut Microbiota in Social Wasps

TLDR
It is demonstrated that S. cerevisiae can prime insect responses against bacterial infections, providing an advantage to future foundress wasps to carry these microorganisms.

Examination of the immune responses of males and workers of the leaf-cutting ant Acromyrmex echinatior and the effect of infection

TLDR
The results suggest that the immune response is a costly and limited process, but further experiments are needed to distinguish between the alternative explanations for the effects observed.

Inbreeding and disease resistance in a social insect: effects of heterozygosity on immunocompetence in the termite Zootermopsis angusticollis

TLDR
It is shown that, one generation of inbreeding differentially affects the survivorship of isolated and grouped termites (Zootermopsis angusticollis) depending on the nature of immune challenge and treatment.

Competing Physiological Demands During Incipient Colony Foundation in a Social Insect: Consequences of Pathogenic Stress

TLDR
Not only the intrinsic and extrinsic factors that influence successful termite colony foundation are identified, but also the maternal and paternal pathogen-induced effects that alter resource allocation decisions of parents toward their offspring, with cascading consequences on colony fitness.
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