Farmed shrimp are constantly threatened by infectious diseases. The increasing pressure on production demands high performance and efficiency that can only be achieved by eliminating or reducing the impact of pathogens. The timely detection of diseases is of great importance, so it is required to have a clear command of the advantages and disadvantages of different diagnostic techniques, in order to implement a rapid response to outbreaks that may occur. Obtaining a diagnosis will depend on various factors, including the early detection of clinical signs and the correct interpretation of the results. In this way, the selection of techniques that allow a preliminary approach to a health emergency and the confirmatory tests that will lead to the design of actions to be chosen. The aim of this paper was to present the advantages and disadvantages of the diagnostic techniques currently avail...

Farmed shrimp are constantly threatened by infectious diseases. The increasing pressure on production demands high performance and efficiency that can only be achieved by eliminating or reducing the impact of pathogens. The timely detection of diseases is of great importance, so it is required to have a clear command of the advantages and disadvantages of different diagnostic techniques, in order to implement a rapid response to outbreaks that may occur. Obtaining a diagnosis will depend on various factors, including the early detection of clinical signs and the correct interpretation of the results. In this way, the selection of techniques that allow a preliminary approach to a health emergency and the confirmatory tests that will lead to the design of actions to be chosen. The aim of this paper was to present the advantages and disadvantages of the diagnostic techniques currently avail...

The determination of the degree of gregarine parasitosis in marine shrimp is performed using qualitative or semiquantitative methods, which are based on the observation of visual fields of prepared coprological samples. These methods are subjective and lack repeatability, so tests were conducted using an alternative method based on the review of the total amount of the sample processed, expressing the results as the content of parasitic agents per unit of intestine length analysed. The proposed method is simple and allows for the reduction of the randomness of the counts, which can be useful in cases where greater certainty of diagnostic results is required.