What is the relationship?
The relationship between a microbe and a living host can simply be said as this, a microbe needs and depends on a living host in order to thrive, reproduce and spread. With a living host a microbe can do none of those things. In this sense, they sort of use the host. Once inside, they take over acting as a "new and improved" host. If the host is not alive, a microbe can still take over, it just cannot thrive there like it could in a living. |
Normal Flora: the microorganisms that establish more or less permanent residence but that do not produce disease under normal conditions are members of this. Members iclude the following...
skin-Propionibacterium, staphylococcus, corynebacterium, Micrococcus, Acinetobacter, Brevibacterium, and certain fungi Eyes-Staphylococcus epidermidis, S. aureus, diptheroids, Propionibacterium, Corynebacterium, streptococci, Micrococcus URS- Staphylococcus aureus, S. epidermidis,and aerobic diphtheroids in the nose; S. epidermidis, S. aureus, diphtheroids, streptococcus pneumonice, Hemophilus, and neisseria in the throat Mouth-streptococcus, lactobacillus, actinomyces, Bacteroides, Veillonella,neisseria, Haemophilis, Fusobacterium, treponema, Staphylococcus, Corynebacterium, and candida Lg. Int.-Escherichia coli, Bacteroides, Fusobacterium, Lactobacillus, Entrococcus, Bifidobacterium, Enterobacter, Citrobacter, Proteus, klebsiella, candida Uretha- Staphylococcus, micrococcus, Entrococcus, lactobacillus, bacteroides, aerobic diphtheroids, pseudomonas, klebsiella and proteus Reprod- lactobacilli, aerobic diphtheroids, streptococcus, Staphylococcus, bacteroides, clostridium, candida albicans and trichomonas vaginalis Symbiosis: the relationship between the normal microbiota and host in which they live together. Three different parts... Commensalism-one organism benefits and the other is unaffected. Examples being the corynebacteria and certain saprophytic mycobacteria Mutualism- Both organisms benefit. Example being E. Coli in the intestines that synthesize with vitamin K. Parasitism- one organism benefits at the expense of the other. Many disease causing bacteria are parasites. |