Clostridium chauvoei

In blackleg, muscle samples for bacterial culture may be taken several hours after death of the animal.

Based on AST, which of the following may be used for antibiotic prophylaxis to prevent Clostridium chauvoei infections?

Anaplasmosis is subclinical in cattle more than 1 year old.

Bos taurus indicus breeds of cattle appear to possess a greater resistance to A. marginale infections than B. taurus taurus breeds.

Atrophy of the spleen is a common finding in cases of anaplasmosis and babesiosis.

Microscopic examination of Giemsa-stained blood smears is effective for demonstrating A. marginale in chronic carriers.

Which of the following drugs may be used to eliminate the carrier state of anaplasmosis?

Babesia bovis is a much more virulent organism than B bigemina.

The main vectors of B. bigemina and B. bovis are:

Animals that recover from the acute disease remain infected for a number of years with B. bovis and for a few months in the case of B. bigemina.

PCR and real-time PCR assays are capable of detecting extremely low parasitemias, as occur in carrier animals of babesiosis.

Imidocarb eliminates B. bovis and B. bigemina from carrier animals.

Cattle are considered to be the major reservoir M. tuberculosis, and are the main source of infection for humans.

The confirmatory test for bovine tuberculosis may take more than 8 weeks for the results to be seen.

This is the preferred specimen for culture of Brucella abortus from a live pregnant cow.

A load of around 1000 metacercariae may cause chronic fasciolosis.

Serovar Pomona has the ability to colonize and persist in the genital tract of infected cows and bulls.

Suramin is curative for trypanosomiasis.

Clinical signs are seen only in ~20% of CAE virus–infected goats during their lifetime.

In which of the following diseases is pasteurizing milk very important?

What is the hallmark sign of BVD?