MicrobiologyB.E Pruitt & Jane J. Stein

AN INTRODUCTIONEIGHTH EDITION

TORTORA • FUNKE • CASE

Chapter 12, part DThe Eukaryotes: Fungi, Algae, Protozoa, and

Helminths

The Helminths versus other eukaryotic microbes

Table 12.1

• Helminths (parasitic worms)• Eukaryotic• Multicellular animals• Chemoheterotrophic• Some are Hermaphroditic• Reduced digestive system• Kingdom: Animalia

• Phylum: Platyhelminthes (flatworms)• Class: Trematodes (flukes)• Class: Cestodes (tapeworms)

• Phylum: Nematodes (roundworms)

Helminths

Trematodes

Figure 12.25

Flukes

Humans as Definitive Host

Figure 12.26

Cestodes

Figure 12.27

Tapeworms•Scolex

•Proglottids

•Reproductive parts

Humans as Intermediate Host

Figure 12.28

Nematodes: Eggs Infective for Humans

Figure 12.29

Roundworms:• Ascaris

•intestinal round worms• Hookworm

•penetrates skin• pinworm

Nematodes: Larvae Infective for Humans

Figure 25.26

• Kingdom: Animalia• Phylum: Arthropoda

(exoskeleton, jointed legs)• Class: Insecta (6 legs)

• Lice, fleas, mosquitoes

• Class: Arachnida (8 legs)• Mites and ticks• May transmit diseases

(vectors)

Arthropods as Vectors

Figure 12.31, 32

Arthropods as Vectors

Figure 12.33

If you believe you have been bitten by this bug, you should contact your personal physician.

Arthropods as Ectoparasites

• Ectoparasites• scabies