Ivica Valpotić

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Colidiarrhea and colienterotoxemia caused by F4(+) and/or F18(+) enterotoxigenic E. coli (ETEC) strains are the most prevalent infections of suckling and weaned pigs. Here we tested the immunogenicity and protective effectiveness of attenuated F18ac(+) non-ETEC vaccine candidate strain against challenge infection with F4ac(+) ETEC strain by quantitative(More)
Enterotoxigenic Escherichia coli (ETEC) infection is the most common type of porcine postweaning colibacillosis (PWC). Among fimbriae of porcine ETEC strains the best studied family of fimbriae are the members of F4 adhesins, existing in at least three variants: ab, ac, ad. Active immunization against porcine PWC is difficult due to: i) ETEC strains are(More)
Immunohistological identification/localization of immunomodulating neuropeptides [vasoactive intestinal polypeptide (VIP) and substance P (SP)] and enzyme nitric oxide synthase (NOS) as well as histomorphometric analyses of kinetics of their release and development of respective nerve fibers density during postnatal ontogenesis of porcine intestinal mucosal(More)
Immunoprophylaxis of porcine postweaning colibacillosis (PWC) caused by enterotoxigenic Escherichia coli (ETEC) expressing F4 fimbriae is an unsolved problem. Just as ETEC strains can exploit intestinal microfold (M) cells as the entry portal for infection, their high transcytotic ability make them an attractive target for mucosally delivered vaccines,(More)
A reference Y-chromosome short tandem repeat (STR) haplotype database is needed for Y-STR match interpretation as well as for national and regional characterization of populations. The aim of this study was to create a comprehensive Y-STR haplotype database of the Croatian contemporary population and to analyze substructure between the five Croatian(More)
BACKGROUND Because European-wide directives are restricting the non-clinical use of antibiotics as in-feed growth promotors in swine production, there is an intensive search for alternative strategies for control and prevention of losses among young pigs. With the growing knowledge of the porcine immune system and its endogenous modulation, it has been(More)
VALPOTIĆ: Effect of levamisole on the number of intestinal goblet cells in weaned pigs experimentally vaccinated against colibacillosis. ABSTRACT Postweaning colibacillosis (PWC) is an etiologically complex disease commonly induced by porcine F4ac + enterotoxigenic Escherichia coli (ETEC) for which no effective vaccine is available. The objective of this(More)
ABSTrACT The preweaning period is the most critical phase in pig production. During that period the production parameters of small birth mass piglets are the poorest and losses are the heaviest. In this study red blood cell characteristics were investigated in suckling piglets of normal and small birth mass, regarding the various changes occurring after(More)
The sequence of development of porcine systemic and local humoral and cellular immunity was analyzed by the age-dependent patterns of total serum immunoglobulin (Ig) levels, responsiveness of peripheral blood lymphocytes (PBL) to common mitogens (phytohemagglutinin, PHA; concanavalin A, ConA; poke-weed mitogen, PWM), or allogeneic PBL in a mixed lymphocyte(More)
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