1. Michelle Sandoval Biol 482L 2/6/14
ALIENS
Michelle Sandoval
Biol 482L
2/6/14
fast

2. History In the future. Rewriting the end of the movies.
This is what we know:
Ship is towed to Earth from planetoid LV-426 (left)
carrying eggs containing unknown specimens (right)
These then attacked humans

3. Center for Disease Control and Prevention
1.5 minutes!
Outbreak

4. Diagnosis & Symptoms Face-hugger
Detachment and death of alien life form
Dreams of being smothered and choking

5. Diagnosis Cont. Subsequent seizures Rupture of Abdominal Cavity
End 2.5 minutes!

6. Life Cycle Direct Lifecycle Soldier Baby Alien Face-hugger Egg.
Soldier
Baby Alien
Face-hugger
Must make some assumptions
Very similar to a trematode parasite. Form reproductive and soldier castes. 2 stages of lifecycle happening concurrently
End: 5
Egg
Momma “Queen”Alien
Direct Lifecycle

7. Precautions AVOID the infective alien organism
Avoid and protect oneself against the soldier alien
Do not attempt to remove the “face-hugger” from the face by force
Will choke the patient
Acid blood
End: 6

8. Parasite Classification Delete?
Definition: Animals that live for an appreciable proportion of their lives in or on another organism, their host, are dependent on that host and benefit from the association at the host’s expense.
(parasites damage, do not kill, the host, obligate)
Plasmodium falciparum, Chytridiomycota
Example of a parasite which kills in most cases: Malaria Plasmodium falciparum
Infection with this parasite accounts for almost all of the fatalities due to Malaria.
However case-fatality rate associated with severe malaria is much less than 50% of infections. (Range differs based on age)
Chitrid fungus: kills
However, killing is not a part of their lifecycle. They make sure to mature and infect a new host before the killing happens after prolonged infection
End: 8

9. Parasite or Predator? Appreciable portion of their lives
Dependent on host
Association has negative effect on host
Does not kill host during life cycle
Aliens
Does spend a portion of lifecycle in host
Host is the only place egg can develop into baby alien
Association causes massive internal bleeding for host
Kills host during life cycle
End: 10

10. Parasitoid!!! Definition:
Parasitoids have an immature life stage that develop on or within a single host, ultimately killing the host. Adult parasitoids are free-living and may be predaceous.
tomato hornworm.
Braconid wasps. Females have ovipositors to inject the host with the egg
Larvae feed inside the bodies of the host and grow out until all that’s left is an empty shell.
End: 12

11. Works Cited
Alien. Dir. Ridley Scott. Perf. Tom Skerritt, Sigourney Weaver. 20th Century Fox, DVD.
Aliens. Dir. James Cameron. Perf. Sigourney Weaver. 20th Century Fox, DVD.