The type of bacteria found in Table 2 that does not fit exactly into any of the
categories listed in Table 1 is:
Table 1
Bacteria can be categorized by how they respond, as indi-
cated by reproduction and growth, to certain temperatures
Growth points or ranges (°C)
They are grouped into four categories psychrophiles, psy-
chrotrophs, mesophiles, and thermophiles-based on their
Classifications Minimum Optimum Maximum
growth response to certain temperatures. Minimal growth
Psychrophile belowo 10-15 below 20
temperature is the lowest point at which the bacteria will
reproduce. Optimum growth point is the temperature at
Psychrotroph 0-5 15 30
which the bacteria reproduce most efficiently. Maximum
growth point is the very highest temperature to which the
Mesophile
5-25 18-45 30-50
bacteria will respond, beyond which the bacteria will not
reproduce at all. Table I lists the types of bacteria as well
Thermophile 25-45 50-60 60-90
as the growth points for each
Table 2 represents a list of common bacteria and their
growth points
Maximum
72
72
50
Table 2
Cardinal growth points (C)
Bacteria name
Minimum
Optimum
Anarybacillus flavithers 30
60
Bacillus flavorhermus 30
60
Clostridium perfringens 15
45
Escherichia coli
10
37
Listeria monocytogenes
1
34
Micrococcus cryophilus 0
15
Stapleylococcus aureus 10
37
Streptococcus pyogenes 20
37
Streptococcus pneumoniae 25
37
45
45
30
45
40
12