How might Pasteurellosis affect laboratory rabbits?

Pasteurellosis is a bacterial infection caused by the bacteria of the genus Pasteurella, which is commonly found in laboratory rabbits. When rabbits are infected, the disease can significantly impact their respiratory health, leading to a condition commonly known as "snuffles." This term refers to the respiratory signs associated with the infection, such as nasal discharge, sneezing, and difficulty breathing, which can disrupt overall respiratory function.

In addition to respiratory issues, Pasteurellosis can have systemic effects, potentially affecting the ears, eyes, and even leading to pneumonia if not treated properly. The infection can result in chronic health issues that further compromise the animal's wellbeing and ability to thrive in a laboratory setting.

The other options do not accurately represent the effects of Pasteurellosis. For instance, it does not improve respiratory function, cause rapid weight gain, or enhance reproductive capabilities. Instead, it primarily poses health risks that can affect multiple systems within the rabbit's body, demonstrating how serious this infection can be in a laboratory environment.