Parasites - PowerPoint PPT Presentation

1 / 20
About This Presentation
Title:

Parasites

Description:

disease or parasite transmissible from an animal species to humans (plural = 'zoonoses' ... 40 kg Golden retriever has 3200 ml of blood ... – PowerPoint PPT presentation

Number of Views:679
Avg rating:3.0/5.0
Slides: 21
Provided by: AnaS7
Category:

less

Transcript and Presenter's Notes

Title: Parasites


1
(No Transcript)
2
Parasites Pests
3
Definitions
  • Parasite
  • Living organism
  • ECTO outside, ENDOinside
  • Lives on, in, with a HOST another living
    organism
  • Obtains nutrients, sustenance from host
  • May damage host (injury, malnutrition, disease)
  • Zoonosis
  • disease or parasite transmissible from an animal
    species to humans (plural zoonoses)

4
Parasites of Interest
  • Parasites
  • Insects (flies, mosquitoes, lice, FLEAS)
  • Arachnids (MITES, ticks, spiders)
  • Nematodes (rounds, hooks, HEARTWORM)
  • Flatworms cestodes TAPEWORMS
  • Information
  • Defining physical characteristics
  • Lifecycles of general interest
  • Disease or damage of concern
  • Control

5
Insects
  • Defining characteristics
  • Body parts
  • Head 1 pair of antennae
  • Thorax 3 pair of legs, wings
  • Abdomen
  • Lifecycle (4 stages)
  • egg ? larva ? pupa ? adult
  • MAGGOT Ectoparasite

6
Insects flies
  • True fly
  • Maggots tissue damage (fly strike)
  • Adults diseases, damage (fly bite), blood loss
  • Mosquito
  • Tissue damage, blood loss
  • Transmission
  • Parasites heartworm (dogs, cats, people)
  • Viruses West Nile, ETC!
  • Allergies antigen transmission
  • Control environment, repellants

7
Insects lice, fleas
  • Lice
  • Defining characteristics
  • No wings, may be biting or sucking type
  • Lifecycle species specific!
  • Damage itch, loss of hair blood
  • FLEAS
  • Defining characteristics no wings, JUMP!
  • Lifecycle 2 wks 4 mos (more?)
  • Damage itch, BLOOD LOSS, TAPEWORMS

8
Fleas
  • Blood loss
  • 200 fleas suck 1/2 tsp (3 ml) blood daily
  • 40 kg Golden retriever has 3200 ml of blood
  • 200 fleas would take 1 year to cause serious
    anemia
  • (3 yrs to drain all the blood)
  • 4 kg puppy or adult cat has 320 ml of blood
  • 200 fleas would take 1 month to cause serious
    anemia or death (3 months to drain all the
    blood)
  • Tapeworms
  • Flea abdomen provides development site
  • Larval worm hatches out of ingested flea
  • Control topical, environmental

9
Arachnids
  • MITES, ticks, spiders scorpions
  • Defining characteristics
  • Body 2 parts
  • Cephalothorax 4 pairs of legs, no antennae, no
    wings
  • Abdomen
  • Lifecycle
  • egg ? larva (6) ? nymph (6) ? adult (8)

10
Arachnids
  • MITES
  • Diseases, damage, zoonoses?
  • Hair, feather loss
  • Skin open to infection
  • Immune function
  • Sarcoptes contagious
  • Demodex everywhere
  • Control
  • Sanitation
  • Control breeding?

11
Arachnids
  • More mites
  • Cats and dogs ear mites (Otodectes spp)
  • Treatments often need to repeat
  • Control sanitation, early treatment
  • Cats walking dandruff Cheyletiella spp
  • Treatments often need to repeat
  • Zoonotic look at elastic lines or belt lines

12
Arachnids
  • Ticks
  • Defining characteristics
  • Hard or soft body types
  • Can be MULTI host parasites
  • Eggs in environment
  • May use different host for each life stage
  • Diseases
  • Lyme, Rocky Mtn spotted fever, ehrlichiosis, tick
    paralysis
  • Control tick removal, environment control

13
Arachnids
  • Spiders, scorpions
  • size matters (for the victim)
  • Diseases, damage, zoonoses
  • Spiders bite paralysis, wound damage, death
  • Brown recluse
  • Scorpions bite spasms, paralysis, death
  • Control environment, avoidance

14
Nematodes
  • Roundworms (ascarids, Toxocara)
  • Zoonotic potential larval migrans
  • Transmission prenatal, oral (milk, eggs, animal
    tissues)
  • Disease GI upset, diarrhea, bloat, obstruction
  • Control sanitation, routine deworming (include
    mother!)

15
Nematodes
  • Hookworms
  • Zoonotic potential larval migrans (skin)
  • Transmission prenatal, oral (milk, larva), skin
  • Disease blood loss dehydration, diarrhea
    (tarry, bloody), wt loss (or no dz)
  • Control sanitation, treat dzd, ? crowding,
    ?nutrition

16
Nematodes
  • Heartworm (Dirofilaria) dogs cats
  • Control monthly prevention, mosquito control

17
World Heartworm
Jan 2000
18
Flatworms cestodes TAPEWORMS
  • Defining characteristics
  • 3 body parts scolex (to hang on), neck, strobila
    (made of segments called proglottids)
  • Lifecycle
  • Flea is required as intermediate host
  • Diseases, damage
  • ? nutrition of host, weight loss, death
  • GI upset, impaction?, scooting
  • Control treatment, flea control

19
(No Transcript)
20
(No Transcript)
Write a Comment
User Comments (0)
About PowerShow.com