A Set of Multiresistant Isolates of Subtype ST-1 with a Variable Susceptibility to Quinolones Are Also Circulating in Spain.

() is one of the worldwide most important infectious agents involved in respiratory complex diseases (RCD). In Spain, the endemic presence of subtypes ST-2 and ST-3 with phenotypic differences linked to their susceptibility to fluoroquinolones opened the way to develop control strategies focused on previous diagnosis of the subtype and the use of directed therapies when were involved in RCD. Surprisingly, microbiological studies conducted during 2023 evidenced for the first time the presence of Spanish isolates of a new -subtype, previously classified as ST-1, recovered from calves with respiratory symptoms and pneumonia in different areas of the country ( = 16).

Excludes in Poultry: Confirming an Old Paradigm Using Conventional and Barcode-Tagging Approaches.

is one of the major foodborne bacterial pathogens, and the consumption of contaminated chicken meats isa primary route of transmission into human food chains. However, the mechanism of transmission within the chicken flock is not fully understood, including competition among strains during chicken infection. The purpose of the present study was to evaluate the competitive exclusion (CE) between different or same species consecutively challenged through the oral route.

[Temporal and spatial variation of shorebirds in Barra de Navidad lagoon, Jalisco, during three non-breeding seasons].

Resident and migratory shorebirds inhabit different kinds of wetlands such as lagoons, rivers and seashores among others. In recent years, these areas have been importantly affected by urban, agriculture and touristic activities, such as the Barra de Navidad lagoon, for which little information is available to support conservation programs. The aim of this work was to describe shorebirds temporal and spatial distribution in Barra de Navidad lagoon during three non-breeding seasons (1999-2000, 2006-2007 and 2008-2009).

Relationship between MT1 melatonin receptor gene polymorphism and seasonal physiological responses in Ile-de-France ewes.

The gene encoding the MT1 melatonin receptor in sheep has a restriction fragment length polymorphism (RFLP) site to the MnlI enzyme whose incidence is associated to the expression of seasonality in several breeds. The aim of this study was to examine the relationship between this genetic marker and the physiological effects of MT1 receptor gene polymorphism on several seasonal functions in Ile-de-France ewes. The study was performed using 12 pairs of half-sib adult Ile-de-France ewes.