Kinds of Relationships between Host

Kinds of Relationships between Host - Examples can be found...

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Kinds of Relationships between Host-Microbe: 1. Mutualism: Both benefit---E. coli in the intestine produces vitamin K and other nutrients, Lactobaccilli maintain urogenital pH around 4 in vagina. 2. Commensalism: Most of the normal flora benefit from the host but confer no advantage back, except, in their numbers maintain diversity and stave off infection. 3. Parasitism: The microbe benefits at the expense of the host. Parasites can be macroscopic (worms) or microbes. Infectious disease is a form of parasitism as is infestation. 4. Opportunism: Opportunists are organisms that are a part of the normal flora but, because of circumstance, become pathogens. Examples include: appendicitis, punture wounds (tetanus)--and the many organisms that infect immunocompromised individuals like those with HIV and who are undergoing chemotherapy, or have their immune systems compromised for another reason. Synergy is when two organisms cause worse problems than either of them alone.
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Unformatted text preview: Examples can be found in mixed infections like gangrene and HIV. Click to see X-RAY and clinical images of: MORBIDITY AND MORTALITY WEEKLY REPORT. EMERGING AND RE-EMERGING INFECTIOUS DISEASES: Over the last twenty years we have had outbreaks of several new diseases and reemergences of some older ones. Examples include: Toxic shock syndrome (Staphylococcus aureus) Necrotizing Fascitis (Flesh eating Disease) Lyme Disease HIV Disease Hanta virus Sin Nombre Pulmonary Syndrome E. coli 0157:H7 Legionaires Disease ( a chlamydia like organism attacking macrophages in the human lung) Ebola Virus Influenza strains (Hong Kong virulent strain) West Nile Fever (Encephalitis in New York City) All of the above are the result of new ways of living and modern transportation. The number of new emerging diseases seems to be accellerating and is a constant challenge to epidemiologists....
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.

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Kinds of Relationships between Host - Examples can be found...

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