1,105 research outputs found
Protozoa, nematodes and amoebae as sporadic agents of neurological signs in dogs and cats.
No full textNel corso della pratica clinica, il medico veterinario si trova spesso di fronte ad animali portati a visita con sintomi neurologici. Alla base di tali affezioni neurologiche nel cane e nel gatto, vi possono essere traumi, neoplasie e disturbi metabolici oltre che infezioni batteriche, virali e parassitarie. Quest’ultime saranno l’oggetto della presente review, nel corso della quale saranno discussi i diversi aspetti riguardanti la biologia, i segni
clinici e le metodiche diagnostiche dei principali parassiti noti per indurre segni neurologici (i.e. Toxoplasma gondii e Neospora caninum) o che
ne possono essere inaspettatamente la causa (i.e. Dirofilaria immitis e Angiostrongylus vasorum). Infine, saranno presi in considerazione alcuni parassiti, quali amebe ed Encephalitozoon cuniculi che, pur essendo capaci di provocare affezioni nervose, sono ancora poco riportati e conseguentemente poco conosciuti
INDAGINE ARCHEOMETRICA SU REPERTI DI MATERIALE CERAMICO RINVENUTI A BAKCHIAS (FAYYUM, EGITTO) NEL CORSO DELLA CAMPAGNA DI SCAVO DEL 1998
No full textSignal transduction in artichoke [ Cynara cardunculus L. subsp. scolymus (L.) Hayek] callus and cell suspension cultures under nutritional stress
No full textStimulated production of secondary phenolic metabolites and proline was studied by using cell cultures of artichoke [Cynara cardunculus L. subsp. scolymus (L.) Hayek] submitted to nutritional stress. Artichoke cell cultures accumulated phenolic secondary metabolites in a pattern similar to that seen in artichoke leaves and heads
(capitula). This paper shows that both callus and cell suspension cultures under nutritional stress accumulated phenolic compounds and proline, at the same time their biomass production was negatively affected by nutrient deficiency. The results obtained strongly suggest that plant tissues respond to nutrient deprivation by a defensive costly mechanism, which determines the establishment of a mechanism of trade-off between growth and adaptive response. Furthermore, the results of this research suggest that perception of abiotic stress and increased phenolic metabolites are linked by a sequence of biochemical processes that also involves the intracellular
free proline and the oxidative pentose phosphate pathway. The main conclusion of this paper is that, once calli and cell suspension cultures respond to nutrient deficiency, in acclimated cells the establishment of a negative correlation between primary metabolism (growth) and secondary metabolism (defence compounds) is
observed
The cockroach Periplaneta americana as a potential paratenic host of the lungworm Aelurostrongylus abstrusus
No full textIntroduction Aelurostrongylus abstrusus is a well-known nematode affecting the respiratory system of felids worldwide. Snails and slugs act as intermediate hosts of this parasite, whereas rodents, birds and reptiles may serve as paratenic hosts. Periplaneta americana, the American brown cockroach, shares the same habitat and ecological features (e.g. nocturnal activity) with both snails and cats. The aim of this study was to evaluate the capability of P. americana to maintain alive A. abstrusus third stage larvae (L3s) after artificial inoculation. Material and methods Twenty-five specimens of P. americana were infected with 100 A. abstrusus L3s collected from experimentally infected Cornu aspersum snails, whereas five specimens were used as control group. After the infection, cockroaches were maintained in individual plastic boxes until dissection for the presence of L3s at 1 (T1), 5 (T5), 10 (T10), 15 (T15), and 20 (T20) days post-infection. Results Except for T15, alive A. abstrusus L3s (n = 63) were found at all time-points, being 26, 19, 16 and 2 L3s retrieved at T1, T5, T10 and T20, respectively. Eleven (17.4%) L3s were found within the digestive tract, 10 (15.9%) in other-than-digestive organs and 42 (66.7%) in the exoskeleton and associated tissues. Nine out of the twenty-five experimentally inoculated cockroaches (36%) died soon after the artificial infection (T1), while in the control group, two out of the five (40%) died before the end of the study (T15) with no difference in the mortality rate between groups. Discussion Results of this study suggest that P. americana could act as a paratenic host of A. abstrusus. Periplaneta americana cockroaches, have a ubiquitous distribution and may be preyed by cats, representing a potential source of infection to cats living in endemic areas
Caratterizzazione archeometrica di materiale fittile proveniente da Bakchias (Fayyum, Egitto). Campagna di scavo 1996.
No full textMonografie di SEAP, Series Maio
Caratterizzazione archeometrica di materiale fittile proveniente da Bakchias (Fayyum, Egitto). Campagna di scavo 1996.
No full textMonografie di SEAP, Series Maio
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