What are the primary clinical manifestations of EHV?

The primary clinical manifestations of Equine Herpesvirus (EHV) include neurological, respiratory, and reproductive symptoms. This virus primarily affects horses and is known for causing a range of conditions depending on the strain and the age of the horse.

Neurological symptoms often arise from EHV-1, which can lead to equine herpesvirus myeloencephalopathy (EHM), presenting as ataxia, loss of coordination, and in severe cases, paralysis. Respiratory symptoms are typically associated with EHV-4 and include coughing, nasal discharge, and elevated respiratory rates, reflecting a viral infection in the respiratory tract. Reproductive issues mainly stem from EHV-1, which can cause abortions in pregnant mares, demonstrating the virus's capability to compromise the reproductive health of affected animals.

In contrast, other options provided do not accurately capture the range of clinical manifestations associated with EHV. For instance, cardiovascular and digestive symptoms are not typical expressions of this viral infection, and musculoskeletal or integumentary manifestations do not characterize EHV. Similarly, while dermatological and systemic symptoms exist, they are not primary concerns associated specifically with EHV infections. Understanding the correct manifestations aids in the early identification and treatment of this virus in equines.