Categorieën: Alle - bacteria - pathogens - toxins - unicellular

door Kayla Velox - Lincoln Alexander SS (2132) 5 jaren geleden

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Microbiology

Bacteria are unicellular and prokaryotic organisms lacking an internal membrane system. They are incredibly small and can only be observed with a microscope. These microorganisms inhabit most surfaces and materials, playing diverse roles in the environment and human health.

Microbiology

Microbiology

Virus

Contagion
Contagion is a movie that we watched in class about the spread of a virus (nipah)

The modes of transmission for this virus was

touching something that was touched by an infected person

air bone (coughing)

the symptoms were

foaming at the mouth

high fever

seizures

The CDC was involved, there job was to create a vaccine and prevent the disease from spreading

in the movie her husband didn't get infected because his immune system was strong and could protect him from the virus

The virus started when the lady touched the chef who touched the infected pig

Viral Diseases
Plants

Viroid's - small infectious molecules of single stranded RNA that have no surrounding capsids.

reduces harvest amount

causes stunt growths

viruses have a difficult time invading plants because they have a cell wall but when plants do get the virus it can be very bad

plant injuries can make plants get the virus easier

insects can be carriers

Cancer causing viruses oncogenic viruses

Hepatitis B

Human herpes virus

Human papilloma virus

Animals

Prions - protein infected particles

prions are nearly indestructible

Transferred in food

linked to several degenerative brain diseases

creutzfeldt-jacob

mad cow

Hoof and mouth disease

Parvo

Rabies

Vaccines
prevention form any viruses

antibiotics are useless against viruses

viruses do not contain the enzymes which antibiotics work

few drugs treat or cure viral disease

examples

mumps

smallpox

rubella

polio

antiviral drugs that are effective interfere with viral DNA or RNA synthesis

stimulate the immune system to react against the actual diseases

Viruses reproduce in 2 different ways lysogenic and lytic

Lysogenic

Lysogenic Infection

The host cell is not immediately destroyed

Viral DNA inserted into the host cell as a pro-phage

A host cell makes copies of the virus indefinitely

The virus's DNA is replicated along with the host cells DNA

The virus's embeds its DNA into the hosts DNA

Lytic

host cell is lysed (bursts) and immediately destroyed

Zika Virus (My InfoGrapgh)
what is a virus?
viruses are very small

to see viruses you'll need the help of an electron microscope

Reproduce by infecting living things

they enter living cells and once inside the cell they use the machinery of the infected cell to produce more viruses

They have RNA or DNA and a protein coat

viruses are non living

Bacteria

Are prokaryotic

Have no internal membrane system

Are unicellular

Can have shapes like

Spirillum (spiral)

Bacillus (rod)

Coccus

Can be

Chemoautotrophic

Photosynthetic

Heterotrophic

causes diseases by

Secreting toxins

Metabolizing their host

Size of Bacteria
can be found on most materials and surfaces
very small

Need a microscope to see

single celled organisms
Bacteria is ALIVE
They need to eat

some are warriors (pathogens) - they attack other living things

not all pathogens are harmful, some of them are helpful

Pediococcus: makes pepperoni, salami and summer sausage

Leuconostoc: makes pickles and sauerkraut

Lactobacillus: makes cheese, yogurt, buttermilk and produces vitamins in your intestine

Harmful pathogens are

Listeria - found in deli foods, lunch meats, smoked fish and vegetables

Salmonella - found in raw meats, poultry, eggs, sprouts, fruits and vegtables

E.coli - found in ground beef, contaminated fruits or vegtables

A pathogen is bacteria that makes you sick

To avoid Pathogens

store food properly to limit pathogen growth

cold temperatures (40 F)

cook food thoroughly to kill any pathogens that may be in your food

wash your hands often so you wont transfer bacteria to your mouth or food

warm water with soap for 20 seconds rub hard between fingers and nails

you can get a pathogen from human contact with someone who is sick

Direct or indirect

other surfaces that are contaminated

Water

Food

They produce poisons (toxins) that make you sick

can destroy body tissue

diarrhea

vomiting

Headache

Fever

they make you sick to get food they need to survive and reproduce

some are scavengers - share the environment around them

some make their own food from sunlight - like plants

They reproduce

Make copies of themselves by dividing in half

Grow in number not size

Outbreaks

measles
Measles can be avoided if everyone takes the vaccine
complications

Most people recover from measles. Measles can cause serious complications in 20% of cases, including ear infections, pneumonia, encephalitis (swelling or inflammation of the brain), seizures, and deafness. In Canada, measles causes death in approximately 1 out of every 3,000 cases.

symptoms

rash

cough

pink eye

red watery eyes

fever

runny nose

who can get measles

Anyone who has been in close contact with someone who has measles can get the disease

Measles, also known as Red Measles or Rubeola, is a serious disease caused by a virus. It is spread very easily through the air when someone with measles coughs or sneezes, and by direct contact with infected nose or throat secretions.
Candida
who is at risk

People who have recently spent time in nursing homes and have lines and tubes that go into their body (such as breathing tubes, feeding tubes and central venous catheters), seem to be at highest risk for C. auris infection.

What types of infections can C. auris cause

ear infections

wound infections

blood stream infections

Why is it a concern

It has caused outbreaks in healthcare settings. For this reason, it is important to quickly identify C. auris in a hospitalized patient so that healthcare facilities can take special precautions to stop its spread.

It is difficult to identify with standard laboratory methods, and it can be misidentified in labs without specific technology. Misidentification may lead to inappropriate management.

It is often multidrug-resistant, meaning that it is resistant to multiple antifungal drugs commonly used to treat Candida infections.

Butterball brand ground turkey
diarrhea, fever, and stomach cramps
6 cases, 0 deaths, 1 hospitalization. Wisconsin, north carlolina, minnesota
bacteria that caused outbreak was Salmonella

Fungus

good fungus
Yeast for beer or bread
Example organisms
Sporangia
Coprinus
Mycelium
diseases
Aspergillosis
Candidiasis
Coccidioidomycosis

human infections result from the inhalation of spores and or dried yeast farms made airborne

pathogen: Cryptococcus neoformans

Fungal Nail Infections
Mucormycosis
Description
They are also heterotrophs, and gain nutrition through absorption.
Fungi are multicellular and eukaryotic.
Fungi includes a vast variety of organisms such as mushrooms, yeast, and mold, made up of feathery filaments called mycelium.
Reproduction
asexually

fragmentation

budding

spores

Protist

Different Types of Protist
Fungus Like

reproduce asexually with spores (like fungi) in fruiting bodies

move very slowly

few mm a day

They roll over forest floor feeding on dead organic matter

multi-cellular body (like giant amoeba) called plasmodium

Animal Like

all heterotrophes, classified by how they move

Sporozoans - plasmodium

many parasites, which depends on host body fluids to move

have no means of locomotion

reproduce by asexually by spores

Flagellates - euglena

Euglena

flagella or flagellum

live in fresh and brackish water rich in organic matter and can also be found in moist soils.

paramecium

live in aquatic environments, usually in stagnant, warm water. Algal photosynthesis provides a food source for Paramecium.

cilia to move and eat

paramecium 40

paramecium 10

paramecium 4

Ciliates - paramecium

sacodines - amoeba

ameoba

reproduce by binary fission

This amoeba likes to live in warm water, including warm lakes and rivers, as well as hot springs.

they use there pseudopods to move and eat

Amoeba 40

Amoeba 10

Amoeba 4

Plant like

all autographs contain CHLOROPHYLL that have cell walls 2 major groups

multicultural algae

Brown algae

Unicellular algae

Diatoms

protist
Chlamydomanous

40

Live in fresh water

move with double flagellum

10

4