For each of the species, briefly describe: -Cell morphology and “arrangement of
ID: 174857 • Letter: F
Question
For each of the species, briefly describe:
-Cell morphology and “arrangement of cells” (if applicable)
-Gram reaction (gram positive or gram negative?)
-describe any other special features (if applicable); i.e. capsules, flagella, acid-fast, etc.
-Where is the species typically found, or in what environmental conditions does the species generally grow?
-What is the species’ role in the environment, if any.
-If this species is pathogenic, describe the infection(s) it causes.
Salmonella enteritidis
Bacillus cereus
Klebsiella pneumoniae
Alcaligenes faecalis
Proteus vulgaris
Explanation / Answer
Salmonella enteritidis
Bacillus cereus
Klebsiella pneumoniae
Alcaligenes faecalis
Proteus vulgaris
Cell morphology
Rod shaped, non motile, non spore forming.
Rod shaped, motile, endo spore forming.
Rod shaped, non motile.
Rod shaped, motile.
Rod shaped, motile.
Gram reaction
Gram negative
Gram positive
Gram negative
Gram negative
Gram negative
Salient features
Primarily adapted to animal hosts rather than humans.
Can survive with or without oxygen.
Can cause beta haemolysis- Complete lysis of RBC.
Motility through flagella.
Can survive with or without oxygen.
Has a polysaccharide capsule over the cell that protects the organism.
Can survive with or without oxygen.
Can cause alpha haemolysis.
Motility through flagella.
Needs oxygen to survive.
Motility through flagella.
Can survive with or without oxygen.
Environment where it is found
Mostly found in animal intestine.
May also be free living in soil and water.
Soil and food, like poultry
Skin, mouth and intestine.
Faeces, soil and water
Faeces, soil and water
Role in environment
Infects poultry and dairy products.
Is used to as a feed additive to reduce salmonella in intestines.
Infection by K. pneumoniae can lead to pneumonia.
Degrades urea to form ammonia. This makes the environment alkaline.
It is used to produce non standard amino acids (amino acids other that the 20 that ear coded through the codon).
Produces hydrogen sulphide and reduces nitrates.
Infection
Raw or undercooked eggs can contain S. enteritidis which can lead to sever food poisoning if consumed.
Produces toxins in food products that can cause vomiting and diarrhea.
Can cause infections of the blood, urinary tract meningitis and pneumonia.
Can cause urinary tract infections.
Can cause urinary tract infections and infections in wounds,
Salmonella enteritidis
Bacillus cereus
Klebsiella pneumoniae
Alcaligenes faecalis
Proteus vulgaris
Cell morphology
Rod shaped, non motile, non spore forming.
Rod shaped, motile, endo spore forming.
Rod shaped, non motile.
Rod shaped, motile.
Rod shaped, motile.
Gram reaction
Gram negative
Gram positive
Gram negative
Gram negative
Gram negative
Salient features
Primarily adapted to animal hosts rather than humans.
Can survive with or without oxygen.
Can cause beta haemolysis- Complete lysis of RBC.
Motility through flagella.
Can survive with or without oxygen.
Has a polysaccharide capsule over the cell that protects the organism.
Can survive with or without oxygen.
Can cause alpha haemolysis.
Motility through flagella.
Needs oxygen to survive.
Motility through flagella.
Can survive with or without oxygen.
Environment where it is found
Mostly found in animal intestine.
May also be free living in soil and water.
Soil and food, like poultry
Skin, mouth and intestine.
Faeces, soil and water
Faeces, soil and water
Role in environment
Infects poultry and dairy products.
Is used to as a feed additive to reduce salmonella in intestines.
Infection by K. pneumoniae can lead to pneumonia.
Degrades urea to form ammonia. This makes the environment alkaline.
It is used to produce non standard amino acids (amino acids other that the 20 that ear coded through the codon).
Produces hydrogen sulphide and reduces nitrates.
Infection
Raw or undercooked eggs can contain S. enteritidis which can lead to sever food poisoning if consumed.
Produces toxins in food products that can cause vomiting and diarrhea.
Can cause infections of the blood, urinary tract meningitis and pneumonia.
Can cause urinary tract infections.
Can cause urinary tract infections and infections in wounds,
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