Fluralaner and Tick Fever in Beef Calves: Tropical Stability

Okay, hereS⁤ a breakdown of the information regarding how enzootic stability and pathogen detection where⁢ assessed in this study, based on the provided text:

1. Enzootic stability Definition:

* ‍ Enzootic stability for Babesia spp. and Anaplasma marginale is defined as more than 75% of the ‍animals in‍ a ⁣herd being serologically positive for these pathogens. (References [8] and [9] ⁢ support this definition).
* In this study,this 75% seroprevalence threshold⁤ was applied‍ to each ‍of the‍ three tick-borne (TF) agents being investigated.
* qPCR was used to confirm the level of exposure to the TF pathogens,complementing the serology results.

2. Pathogen Detection Methods:

*⁣ Blood Smears: Used to assess Babesia spp. ‍parasitemia and ‍ A. marginale bacteremia.
⁢ * ‍ Though, blood smears were not used to determine enzootic stability due⁤ to their low sensitivity.
* ⁣ Blood smears were taken at ⁤25,⁢ 60, 135, 188, and 241 days of age.
‍ * The‍ method ⁢for determining parasitemia/bacteremia percentage followed the protocols described in References [20] and [21].
* Serology: The primary method for determining enzootic stability (as described above).
* ⁢ qPCR: Used to confirm exposure⁢ levels to the TF pathogens.

3. Treatment:

* Calves showing clinical signs of TF pathogens received “salvation treatment” with⁤ diminazene (3.5 mg/kg).

In essence,⁤ the study⁣ used a combination of methods: ⁤serology to define enzootic stability based⁣ on prevalence, qPCR to ‍confirm exposure, and ⁢blood smears to monitor parasite/bacteria levels, but acknowledging the limitations of blood smears for assessing overall stability.