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DTSTART:20250330T030000
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BEGIN:VEVENT
DTSTAMP:20260424T143004Z
UID:1748347200@ist.ac.at
DTSTART:20250527T140000
DTEND:20250527T150000
DESCRIPTION:Speaker: Florian Strahodinsky\nhosted by Beatriz Vicoso\nAbstra
 ct: Ants are frequently challenged by different pathogens\, which they cou
 nter with individual and collective responses. Usually\, the pathogens lik
 e fungi or viruses are solitary and passive pathogens transmitted from hos
 t to host. Here\, we use a nemato bacterial pathogen complex to study worm
 -borne disease in black garden ants. These entomopathogenic nematodes are 
 active parasites with an own behavior and chasing pray. In the first chapt
 er\, we investigated the basic biology of the host-pathogen relationship. 
 We tested different ant life stages and found that adult ants are generall
 y resistant to nematode infection\, whereas brood is highly susceptible. I
 n the case of worker pupae\, we found a slight protective effect of the co
 coon. When larvae are accompanied by adults\, meaning a queen or a group o
 f workers\, survival is significantly enhanced. Moreover\, we found that n
 ematodes can transmit from infected cadavers to healthy worker larvae\, co
 nfirming a transmissible disease in ants. Again\, worker presence signific
 antly reduces transmission risk. This can be attributed to behavioral resp
 onses of adults to nematode exposure. In the end\, we were also able to di
 sentangle the pathogen system and investigate the pathogenic effect of the
  bacterial and nematode components. In the second chapter\, we studied the
  effect of multiple infections in adult queens and queen larvae. By multip
 le exposures in the mode of coinfection and superinfections\, we wanted to
  assess the detrimental effect of combined fungal and nematode exposure to
  better understand how the pathogens interact with each other in an ant ho
 st. We found instances where combined exposure lead to higher mortality in
  a given time frame in both\, adult queens and queen larvae. Overall entom
 opathogenic nematodes are a promising model to study worm infections in an
 ts which extend our knowledge on collective disease defense.
LOCATION:Moonstone Bldg / Ground floor / Seminar Room E (I24.EG.030e) and Z
 oom\, ISTA
ORGANIZER:
SUMMARY:Florian Strahodinsky: Thesis Defense: Social immunity in a tri-part
 ite host pathogen relationship
URL:https://talks-calendar.ista.ac.at/events/5752
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