Profile Of An Infectious Food-Poisoning Bacteria Flashcards
(20 cards)
What shape is salmonella?
Rod-shaped
How does salmonella reproduce?
It reproduces asexually by binary fission
Is salmonella contagious?
Yes
Does salmonella need oxygen to grow?
It is facultative, it can grow with or without oxygen
According to its optimum temperature, what type of bacteria is salmonella?
Mesophilic
What type of food poisoning does salmonella cause?
Infectious
Is salmonella gram positive or gram negative?
It is gram negative
Salmonella is gram negative, what are the characteristics of a gram negative bacteria.
Is cell wall is made of two thin layers
Does not produce endospores
Has flagella
High resistance to antibiotics
Describe salmonella.
11
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
What is the optimum temperature for salmonella?
37 degrees Celsius
What pH environment does salmonella grow best in?
A slightly acidic to neutral environment
6.5 - 7.5
What inhibits salmonella growth?
Salt
What type of toxin does salmonella produce?
2
Endotoxin
Toxin produced inside the bacteria cell wall
What are the symptoms of infectious food poisoning caused by salmonella?
Nausea and vomiting
Abdominal pains
Diarrhoea
Fever
What foods are considered high risk for salmonella food poisoning?
(2)
Raw or undercooked eggs, meat, fish and poultry
Unpasteurised milk and cheese
What are the sources of salmonella?
3
Human and animal intestines and faeces
Unwashed hands
Rodents and pests
What is the incubation period for infectious food poisoning caused by salmonella?
12-36 hours
For how long can infectious food poising caused by salmonella last?
1-7 days
Under what 8 headings should a detailed account of an infectious food-poisoning bacteria be made?
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
Name a bacteria which causes infectious food poisoning.
Salmonella
