Answer :
Final Answer:
The O antigen designation is specific to Gram-negative bacteria, indicating the presence of an outer membrane.Gram-negative bacteria have a unique double-membrane structure distinct from Gram-positive bacteria.The "0153:H7" nomenclature follows the convention for Gram-negative bacterial strain classification.Therefore, the correct answer is option D. This bacterial strain Is Gram negative bacterial strain.
Explanation:
The designation "0153:H7" refers to the specific strain of bacteria's antigenic characteristics. In this case, "0153" indicates the type of O antigen, and "H7" represents the flagellar antigen. This nomenclature is commonly associated with strains of Escherichia coli (E. coli), a well-known bacterium.
The most critical piece of information here is the type of O antigen, "0153." In bacterial classification, the O antigen is a component of the lipopolysaccharide layer of the outer membrane, which is a characteristic feature of Gram-negative bacteria. Gram-negative bacteria have a distinct cell wall structure that includes an outer membrane composed of lipopolysaccharides, making them different from Gram-positive bacteria.
Therefore, when you encounter a bacterial strain with an O antigen type designation like "0153," you can confidently conclude that it is a Gram-negative bacterial strain.
In summary, "0153:H7" refers to an E. coli strain with a Gram-negative cell wall structure due to the presence of the O antigen "0153."
Therefore, the correct answer is D. Is Gram negative bacterial strain.
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