Final answer:
In a blood culture, the yellow bottle is used for culturing anaerobic bacteria. Organisms that show dense growth at the surface and turbidity throughout in a thioglycolate medium tube are facultative anaerobes.
Step-by-step explanation:
In a blood culture, the yellow bottle tests for organisms that grow without exposure to air. This relates to the study of bacteria and their ability to grow in different atmospheric conditions. The yellow bottle typically contains a medium that supports the growth of anaerobic bacteria, which do not require oxygen for growth and may even be harmed by it.
Analysis of Culture Growth Patterns
Examining growth patterns in thioglycolate medium can help identify the type of bacteria present. For example, if an inoculated thioglycolate medium culture tube shows dense growth at the surface and turbidity throughout the rest of the tube, the correct conclusion is B. The organisms are facultative anaerobes, meaning they can grow in the presence or absence of oxygen.