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Home Economics: 10.1 - Food Spoilage > Profile Of An Infectious Food-Poisoning Bacteria > Flashcards

Profile Of An Infectious Food-Poisoning Bacteria Flashcards

1
Q

What shape is salmonella?

A

Rod-shaped

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2
Q

How does salmonella reproduce?

A

It reproduces asexually by binary fission

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3
Q

Is salmonella contagious?

A

Yes

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4
Q

Does salmonella need oxygen to grow?

A

It is facultative, it can grow with or without oxygen

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5
Q

According to its optimum temperature, what type of bacteria is salmonella?

A

Mesophilic

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6
Q

What type of food poisoning does salmonella cause?

A

Infectious

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7
Q

Is salmonella gram positive or gram negative?

A

It is gram negative

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8
Q

Salmonella is gram negative, what are the characteristics of a gram negative bacteria.

A

Is cell wall is made of two thin layers

Does not produce endospores

Has flagella

High resistance to antibiotics

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9
Q

Describe salmonella.

11

A 
Rod-shaped
Reproduces asexually by binary fission
Contagious
Facultative
Mesophilic - 37 degrees Celsius
Causes infectious food poisoning
Gram negative
- cell wall with 2 thin layers
- has flagella
- no spore production
- high resistance to antibiotics
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10
Q

What is the optimum temperature for salmonella?

A

37 degrees Celsius

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11
Q

What pH environment does salmonella grow best in?

A

A slightly acidic to neutral environment

6.5 - 7.5

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12
Q

What inhibits salmonella growth?

A

Salt

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13
Q

What type of toxin does salmonella produce?

2

A

Endotoxin

Toxin produced inside the bacteria cell wall

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14
Q

What are the symptoms of infectious food poisoning caused by salmonella?

A

Nausea and vomiting
Abdominal pains
Diarrhoea
Fever

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15
Q

What foods are considered high risk for salmonella food poisoning?
(2)

A

Raw or undercooked eggs, meat, fish and poultry

Unpasteurised milk and cheese

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16
Q

What are the sources of salmonella?

3

A

Human and animal intestines and faeces

Unwashed hands

Rodents and pests

17
Q

What is the incubation period for infectious food poisoning caused by salmonella?

A

12-36 hours

18
Q

For how long can infectious food poising caused by salmonella last?

A

1-7 days

19
Q

Under what 8 headings should a detailed account of an infectious food-poisoning bacteria be made?

A

Description of bacteria

Environmental factors needed for the bacteria’s growth

Sources of the bacteria

High-risk foods

Symptoms of infectious food-poising by the bacteria

Incubation period of food-poisoning by the bacteria

Duration of food-poisoning by the bacteria

Prevention of food-poisoning by the bacteria

20
Q

Name a bacteria which causes infectious food poisoning.

A

Salmonella

Home Economics: 10.1 - Food Spoilage (7 decks)

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