Problem 22 - Biology

Question

Which of the statements about biofilms is incorrect? a. Biofilms are considered responsible for diseases such as cystic fibrosis. b. Biofilms produce dental plaque, and colonize catheters and prostheses. c. Biofilms colonize open wounds and burned tissue. d. All statements are incorrect.

Step-by-Step Solution

Answer

d. All statements are incorrect.

Step 1: Understand Biofilms

Biofilms are clusters of microorganisms that stick to each other and adhere to surfaces in a protective matrix. They are involved in various infections and medical conditions.

Step 2: Analyze Statement a

Statement a claims that biofilms are responsible for diseases such as cystic fibrosis. Biofilms can indeed exacerbate cystic fibrosis by promoting bacterial infections in the lungs, making statement a correct.

Step 3: Analyze Statement b

Statement b mentions that biofilms produce dental plaque and colonize catheters and prostheses. This is true as biofilms are known to form on teeth as dental plaque and on medical devices, leading to infections, making statement b correct.

Step 4: Analyze Statement c

Statement c suggests biofilms colonize open wounds and burned tissue. Biofilms can indeed infect wounds and burned tissue, leading to chronic infections, making this statement correct as well.

Step 5: Analyze Statement d

Statement d claims all statements are incorrect. However, from the analysis, all previous statements (a, b, and c) are correct. Therefore, statement d is incorrect.

Step 6: Identify the Incorrect Statement

Since statements a, b, and c are correct, the incorrect statement is d.

Key Concepts

microorganism clusters

Biofilms are clusters of microorganisms that group together and stick to surfaces. This grouping allows them to form a protective matrix, which helps them survive in various environments. By staying together, these microorganisms can create environments that are difficult for the immune system or antibiotics to penetrate.
This cluster can include bacteria, fungi, and other microbes. By working together, they can share resources and communicate through chemical signals. Biofilms are extremely tough due to this cooperation, making them resistant to many treatments.

medical conditions

Biofilms can cause or worsen several medical conditions. One prominent example is cystic fibrosis. This genetic disorder causes thick, sticky mucus to form in the lungs, and biofilms can make it worse by facilitating stubborn bacterial infections.
Another significant impact of biofilms is seen in dental health. Dental plaque, which is essentially a biofilm, can lead to cavities and gum disease if not properly managed.
Moreover, biofilms can colonize medical devices like catheters and prostheses. This can lead to infections that are hard to treat, often requiring the removal of the contaminated device. The ability of biofilms to adhere to surfaces makes this a particular challenge in healthcare settings.

infections

Infections caused by biofilms are notoriously difficult to treat. This is because the protective matrix around the biofilm makes it resistant to antibiotics. The matrix acts as a barrier, preventing drugs from reaching the microorganisms within.
Biofilms can form in various parts of the body and on medical equipment, leading to persistent infections. For instance, they are commonly found in open wounds and burned tissue, where they slow down healing and can cause chronic infections.
Another troubling aspect of biofilm infections is that they often require more aggressive and prolonged treatment. In some cases, surgery might be needed to remove the infected tissue or device. This makes understanding and controlling biofilms crucial in medical treatment.