Neosporosis in cattle

Area of Science:

• Veterinary Parasitology
• Bovine Reproduction
• Infectious Diseases

Background:

• Neospora caninum infection is a major global cause of bovine abortion, primarily occurring mid-gestation.
• The parasite establishes chronic infections in cattle, posing a significant threat to herd reproductive health.
• Both endemic and epidemic abortion patterns are observed, highlighting the disease's widespread impact.

Purpose of the Study:

• To review the epidemiology, transmission, and diagnosis of Neospora caninum infection in cattle.
• To discuss the challenges in controlling and preventing neosporosis in dairy herds.
• To highlight the importance of vertical transmission in maintaining the parasite within cattle populations.

Main Methods:

• Review of existing literature on Neospora caninum infection in cattle.
• Analysis of diagnostic methods including histopathology, immunohistochemistry, and serological testing.
• Examination of proposed transmission routes: horizontal (via definitive host) and vertical (transplacental).

Main Results:

• Neospora caninum is a leading cause of diagnosed bovine abortion globally.
• Vertical transplacental transmission is a key factor in maintaining chronic infection and congenital transmission.
• Dogs are confirmed definitive hosts, but their role in natural cattle infections requires further investigation.
• Immune responses (humoral and cell-mediated) influence clinical outcomes of fetal infections.

Conclusions:

• Effective control methods for Neospora caninum infection in cattle are currently lacking.
• Management strategies should focus on reducing congenital infection rates and minimizing environmental transmission.
• Further research is needed to elucidate the role of definitive hosts in natural transmission cycles.