Microcheck 191

Depending on the relative benefit to each partner in a relationship, such as a human host and a microorganism, the relationship can be described as mutualism, commensalism, or parasitism.

■ How is mutualism different from commensalism?

Streptococcus species Branhamella catarrhalis Corynebacterium species Haemophilus species Neisseria species Mycoplasma species

Large intestine

Bacteroides fragilis Escherichia coli Proteus mirabilis Klebsiella species Lactobacillus species Streptococcus species Candida albicans Clostridium species Pseudomonas species Enterococcus species

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