MBIOS 101 1nd Edition Lecture 21 Outline of Last Lecture - Chemical Controls1. Exotoxins2. Endotoxins3. Portal of Exit and TransmissionOutline of Current Lecture – 1. Mutualism 2. Commensalism 3. Parasitism4. Ectopic host Current Lecture 1. Host-microbe interactions/Symbiosis interactions a. Types i. Mutualism- both parties benefit 1. Ex. Large intestine – 500 species bacteriaa. Bacteria produce Vitamin K (forms blood clot)i. Fat-soluble vitamin ii. Don’t see it in large concentrations in our food iii. Give babies a vitamin K shot 30 minutes after being born (umbilical cord could break off, circumcision) b. Produce Vitamin B (Biotin energy) i. Need these vitamins to be able to make all the food2. Rumen – cattle, deer, elka. Bacteria digest cellulose (plant cell wall) releases glucose b. Thin piece of tissue blocks off rumen so milk goes to the right spot c. After munching, licking themselves, etc. it starts to break down These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.d. What about horses and pigs? Have a cecum full of bacteria 3. Termite – Bacteriaa. Digest wood ii. Commensalism 1. One party benefits/ one party doesn’t care (and is not harmed)2. Example – NFO on skina. Staph epi, staph aureusb. Our skin is their home – but our skin will function with or without3. Example – shark and pilot fish a. Shark: unharmedb. Pilot fish: shark home iii. Parasitism 1. One party benefits/ one party can be harmed if it is out of balance2. Example: Puppy and round worm (ascaris canis) a. All puppies are born with worms b. They get it from the momc. You know the puppy has an overload of worms if it has a super large stomach, rough fur, 3. Example: Tick on Moose a. You can get so many ticks on a moose that the moose gets sucked dry b. Ticks are super small – tick that causes lyme’s disease is the size of a pen tip c. Bulls eye rash is stereotypical of Lyme’s disease 4. Tapeworm – attaches to intestinal tract 5. Heart worm- mosquito to dogs 6. Trypanosoma – sleeping sickness (tsetse flies transmit it)iv. Ectopic Host wrong host1. Kids/puppy – worms usually in dogs (got in kids and wandered because it was the wrong
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