Changing weather conditions remained a major driver of disease during August. An unusually warm winter was interrupted by short periods of severe cold, resulting in livestock losses in some areas, while the generally warmer conditions allowed parasites and vectors to remain active much later than expected.

Wireworm continued to be reported in sheep into August, while blue ticks and associated tick-borne diseases, particularly anaplasmosis, persisted throughout winter. Producers should use early spring to assess parasite burdens and confirm that current control products remain effective.

In cattle, difficult calvings and associated vaginal and uterine prolapses dominated disease reporting. Increasing reports of inkberry poisoning were also received, with cases reported in cattle, sheep and occasionally goats.

As veterinarians begin testing bulls ahead of the next breeding season, increasing numbers of trichomoniasis and vibriosis cases are being identified. With commercial vaccines no longer readily available, early diagnosis and structured herd management become particularly important.

Foot-and-mouth disease reports declined considerably across most provinces following the first round of vaccination, although new outbreaks continue in areas where the disease has not previously occurred.

Looking ahead to spring, early reports of midges and favourable vector conditions increase the potential risk of bluetongue. Rainfall in the Northern Cape and Free State also increases concern around Rift Valley fever following cases at Augrabies during late 2025.

This month’s report focuses on Inkberry Poisoning, Trichomoniasis and Vibriosis, Bluetongue and Rift Valley Fever.