During a postmortem examination, a diagnosis of gossypol toxicity shows which main lesion?

Gossypol toxicity is associated with certain characteristic lesions observed during postmortem examinations. The main lesion identified in cases of gossypol toxicity includes a pale-streaked heart, which results from the toxic effects of gossypol on cardiac tissue. The heart muscle can appear streaked due to changes in its structure and function, leading to necrosis or degeneration of myocytes.

In addition to the cardiac changes, gossypol toxicity often leads to edema in the lungs. This pulmonary edema can occur as a result of compromised cardiovascular function and increased permeability of the vascular endothelium, allowing fluid to accumulate in the lung tissue.

The presence of red-tinged fluid can be indicative of hemorrhage or other fluid-related changes resulting from systemic effects of gossypol.

Together, these findings—in particular, the pale-streaked heart and edematous lungs—reflect the systemic impact of gossypol toxicity on multiple organ systems. This combination of lesions is distinctive and aids in the diagnosis of gossypol-related issues in affected animals.