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Sociality and Disease Resistance

Sociality and Disease Resistance. Rosengaus et al . 1998. Behavioral Ecology and Sociobiology 44:125-134. Cost/Benefit of Sociality: Disease. Social Organization: Cost Increased Contact Between Individuals Greater Transmission of Direct-Contact Pathogens Social Organization: Benefit

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Sociality and Disease Resistance

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  1. Sociality and Disease Resistance Rosengauset al. 1998. Behavioral Ecology and Sociobiology 44:125-134.

  2. Cost/Benefit of Sociality: Disease Social Organization: Cost • Increased Contact Between Individuals • Greater Transmission of Direct-Contact Pathogens Social Organization: Benefit • Allogrooming Remove Parasites, Spores Antibiotic Transfer

  3. Rosengauset al (1998) Wood-dwelling social insects (termites and ants) Live and/or feed in diverse microbial community Includes pathogens Controlled microclimate, Good for pathogen growth Social adaptations to disease?

  4. Rosengauset al (1998) Dampwood termite Zootermopsisangusticollis Entomopathogenic fungus Metarhiziumamisopliae Infection can be lethal

  5. Rosengauset al (1998) Spray water/conidiospores on filter paper Control: water only Termites walk on paper for one hour Transfer to groups, size = 1, 10, 25 10 – 25, Similar to young, developing colony

  6. Rosengauset al (1998) Treatment groups: Environmentally exposed: blue Differentiate any mortality Direct vs contact exposure Monitored survival/mortality for 20 days

  7. Rosengauset al (1998) Open square: Control Closed square: G = 1 Circle: G = 10 Triangle: G = 25

  8. Rosengauset al (1998) Social group: significantly higher survival Allogrooming: Before/after spores appeared

  9. Rosengauset al (1998) 53-fold increase in allogrooming 24 hours after exposure Remove spores from cuticle Saliva may inhibit spore viability Discovered new ‘vibratory” display

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