Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 57

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 3 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  zespol oddechowy swin
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 3 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Zespol chorobowy ukladu oddechowego swin

72%
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Wybrane dane z 18. Kongresu Specjalistow Chorob Swin

72%
The definition of the porcine respiratory disease complex (PRDC) is presented and compared with diseases caused by a single etiological viral or bacterial agent. The classification of viruses or bacteria participating in the multifactorial etiology of disease complexes, among them PRDC, include microorganisms initiating the pathological process, as well as a second group of microorganisms, following after the primary destruction of the resistance to infection, that joins in the pathogenesis of the pathological complex. Another grouping takes into account the higher and lower importance of the etiological agents in causing disease and losses in animal production. The role of the following microorganisms participating in the etiology of PRDC is defined as follows: Porcine reproductive and respiratory syndrome virus, Swine influenza virus, Aujeszky disease virus, Porcine circovirus type 2, Porcine respiratory corona virus, Porcine cytomegalovirus, Mycoplasma hyopneumoniae, Bordetella bronchiseptica, Pasteurella multocida, Haemophilus parasuis, Streptococcus suis, Actinobacillus suis, Arcanobacterium pyogenes and Salmonella spp. Data on simultaneous bacterial-bacterial interactions, viral-viral interactions, and bacterialviral interactions are discussed.
Two groups of swine diseases were presented depending on their etiology. The first one included diseases caused, in each case independently, by one pathogenic microorganism and the second one contained diseases primarily caused by unfavorable environmental conditions. In this group as a consequence of the lowering of resistance against infection pathological action by facultatively pathogenic microorganisms took place. The paper concentrates on the two syndromes belonging to the second group of diseases: porcine post-weaning diarrhea (PPWD) and porcine respiratory disease syndrome (PRDS). In relation to PPWD, predisposing environmental factors connected with intensive technologies of swine production were presented. These were the following: a short period of lactation, too low temperatures in the weaning house, particularly during the two first weeks after weaning, and improper ventilation. As a consequence of these predisposing environmental conditions facultatively pathogenic E. coli strains proliferate in the intestine. Their pathogenic factors, special adhesions and enterotoxins participating in the pathogenesis of diarrhea were characterized. The role of rotaviruses as additional etiological agents of PPWD was also mentioned. Vaccination and antibiotic therapy were evaluated. As the next multifactorial disease, PRDS was characterized. Environmental factors contributing to lowering the resistance of the respiratory system to infection were noted. Some other contributing factors were: inadequate gilt replacement programs, large populations and too high a density of pigs, wide ranges of weaning ages, co-mingling pigs with mixed health status. Mycoplasma hyopneumoniae and PCV2 were mentioned as the main microorganisms participating in the etiology of the syndrome the PRRS virus, followed by other facultatively pathogenic microorganisms contributing to the development of the disease. Suggestions for general prophylactic measures were mentioned. Vaccination, particularly against PCV2, but also the two other noted microorganisms, was recommended. A figure containing general indications of potential risk factors in relation to both described syndromes was included in the paper.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 3 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.