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Microbiology Lecture 18 Vocab
Intro to the Eukaryotes:Algae, Protozoa, Fungi, Arthropod Disease Vectors, Helminth Parasites
40
Biology
Undergraduate 2
02/27/2009

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Term
Algae
Definition
A large and diverse group of simple, typically autotrophic organisms, ranging from unicellular to multicellular forms
Term
Dinoflagellate
Definition

a large group of flagellate protists

 

Protist: a diverse group of eukaryotic microorganisms

Term
Red Tide
Definition

A common name for a phenomenon known as an algal bloom, an event in which estuarine, marine, or fresh water algae accumulate rapidly in the water column

 

When algae is environmentally hazardous

Term
Paralytic Shellfish Poisoning
Definition
These shellfish are filter feeders and, therefore, accumulate toxins produced by microscopic algae, such as dinoflagellates and diatoms, and cyanobacteria
Term
Pfiesteria
Definition
researchers claim is responsible for many harmful algal blooms in the 1980s and 1990s on the coast of North Carolina and Maryland. The species name piscicida means "fish-killer."
Term
Protozoa
Definition
microorganisms classified as unicellular eukaryotes
Term
Flagellates
Definition

cells with one or more whip-like organelles called flagella

 

Under the protozoa category

Term
Amoebae
Definition

term used either to describe protists that move by crawling via pseudopods, or to refer to a genus that includes species that move by this mechanism

 

Have cytoplasmic streaming

 

Diarrhea causing

Term
Ciliate
Definition

Protozoa

 

Lack Chlorophyll

 

Can cause colonic ulcers and dysentery (involves ulceration, bleeding, and abdominal cramping)

 

Term
Sporozoa
Definition

Protozoa that possess an apicomplex which allow for gliding motility

 

Can cause malaria, toxoplasma, and cryptosporidium

Term
Apicomplex
Definition
In sporozoa protozoa that allow it to be motile (gliding motility)
Term
Endocytosis
Definition
Process by which protozoa engulf their food particles
Term
Trophozoite
Definition

One of the complex life cycles

 

Motile form

Term
Cyst
Definition

One of the complex life cycles

 

Resistant to environmental damage

 

Resting?

 

In contrast to motile trophozoite

Term
Schizogony
Definition

Multiple division

 

Can divide into 8 different cells per division

Term
Fungi
Definition

Saprophytes (eat dead stuff)

 

Classified by reproduction

 

No photosynthesis

 

Live off of decaying organic material

Term
Yeast
Definition

Single cell form

 

Divide by fission or by budding

Term
Mold
Definition

Filamentous (hyphal) form of fungi

 

Form spores (NOT like bacteria)

Term
Mushroom
Definition

Have visible mycelium with spores

Term
Dimorphic
Definition

Under different environmental condictions a yeast can turn into a mold form

 

Both a yeast and mold

Term
Zygomycetes
Definition

Have two mating types grow together to form a zygosporangium (in the middle where they meet)

 

Fused hyphae form spores

 

Labeled as + or -, but can look as a mom and dad

 

They grow fast on agar

Term
Ascomycetes
Definition

Ascospores form at the end of a filament

 

Spore sacs produced on end of filament (hyphae)

Term

Basidiomycetes

Definition

The reproductive structure in the mushroom

 

Spores bud from the mushroom

Term

Ergot

Definition

A fungal toxin that is from rye smut

 

Constricts blood vessels which gives you a tingly, burning sensation

 

Caused mass hysteria/hallucinations with the "witches"

Term
Aflatoxin
Definition

A fungal toxin that is the carcinogenic toxin from Aspergillus

 

If you inhale this and it germinates in your lungs it can cause cancer

 

Respiratory system fungus

Term
Mycosis
Definition
Condition in which fungi[1] pass the resistance barriers of the human or animal body and establish infections.
Term
Systemic/Cutaneous/Superficial
Definition

Types of mycosis

 

Systemic: very serious with blood infections, can be fatal

 

Cutaneous: not serious, athlete's foot, jock itch, ringworm

 

Superficial: not serious, dandruff

 

 

Term
tinea
Definition
 general term used to describe skin mycoses
Term
Mechanical/Biological Vector
Definition

Mechanical: bacteria or viruses are transmitted ON the vector, but the vector is not a host

 

Biological: bacteria or viruses live IN the vector as a host

Term
Arthopod
Definition

Can transmit many diseases as carriers or vectors (mechanical or biological)

Term
Insect
Definition

Biggest class of arthropods and the only ones with wings

 

Fleas, lice, and ticks

Term
Arachnid
Definition

 joint-legged invertebrate animals with eight legs

 

Mites

Term
Helminths
Definition

Worms and Flukes

 

Includes nematodes, tapeworms, and flukes

 

NOT ringworm

Term

Nematodes

Definition

Some digestive worms (Ascaris, pinworms)

 

Others burrow through the skin into the bloodstream (hookworm, trichinella, filaria)

Term
Tapeworm
Definition

Long and flat --> the pork tapeworm is the bad one

 

Proglottides w/egg shed in feces

 

Cysticerci

Term
cysticercal larva
Definition

They spread systemically and can migrate to the brain

 

Type of tapeworm

Term
Flukes
Definition

Have complex lifestyles

 

Type of helminth

Term
schistosomiasis / bilharzia
Definition

Burrow through skin to initiate a very complex life cycle

 

Cercarial larvae bury thru the skin; grow in adults in blood; lay eggs; migrate to liver; shed in feces; hatch into miracidial larva; eaten by snail; develops into cericarial again...

Term
Cercarial Larva
Definition
Bury into the skin of humans to begin a complex life cycle for a type of fluke called Schistosomes
Term
Miracidial Larva
Definition

Hatch toward the end of the very complex life cycle of Schistosomes.

 

Hatch in human feces and get eaten by snails

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