Browsing by Author "Madeira, Marta"
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- Eliminação parasitária em ovinos da raça Merino Branco e dos cruzamentos entre as raças Serra da Estrela, Île de France e RomanovPublication . Madeira, Marta; Jorge, H.; Ribeiro, J.; Belo, A. T.; Pereira, M. S.; Crespo, Maria VirgíniaEfectuou-se o estudo da eliminação parasitária em quatro grupos de ovelhas em pastoreio [raça pura Merino Branco e cruzamentos rotativos com as raças Serra da Estrela (SE), Île de France (IF) e Romanov (RO)], com o objectivo de determinar o tipo e o grau de parasitismo presentes. Durante o período de Fevereiro a Maio de 2002 realizaram-se quinzenalmente colheitas directas de fezes e as respectivas análises coprológicas qualitativas e quantitativas. Verificou-se a presença de estrongilídeos gastrintestinais (ovos), e pulmonares (larvas de 1º estadio - L1), assim como ovos de Strongyloides sp., Moniezia sp., Taenidae e de oocistos de Eimeria sp.A média de eliminação de ovos de estrongilídeos gastrintestinais, para a raça pura, variou entre ligeira e média, enquanto que, para os cruzamentos, considerados variou entre ligeira, média e importante, apresentando ainda o cruzamento RO x (RO x IF x SE), uma eliminação muito importante. Nas associações parasitárias verificou-se que 41,67% dos animais apresentaram infecção simples, apresentando os restantes: infecção dupla em dez animais (41,67%); infecções triplas em dois animais (8,33%) e infecções quádruplas igualmente em dois animais (8,33%). A raça pura Merino Branco evidenciou-se como a mais resistente ao parasitismo gastrintestinal. Nos cruzamentos, o que apresentou menor susceptibilidade foi o cruzamento SE x (RO x IF x SE) e o mais susceptível foi RO x (RO x IF x SE).Os resultados foram sujeitos a um estudo estatístico, pelo método de Mann-Whitney e de Wilcoxon. Parasitological egg out put was studied in four groups of grazing ewes [Merino Branco breed and the rotative crossbreed with Serra da Estrela (SE), Île de France (IF) and Romanov (RO)], to determinate the type and degree of gastrintestinal and pulmonary parasitism. Qualitative and quantitative analyses on faeces were performed from February to May 2002. Gastrintestinal, Strongyloides sp. Moniezia sp. and Taenidae sp. eggs, Eimeria sp. oocysts and lung worms larvae (1.st stage) were identified. The mean egg out put of gastrintestinal strongyles varied from light to medium infection at the pure breed, and from light to severe infection at the crossbred ewes. However the RO x (RO x IF x SE) ewes showed a very important egg out put. The presence of simple and double infection was detected on 41,6,7%, each and with three and four species was noticed on 8,33%, each.
- Intestinal parasites in dogs from the Center-west of PortugalPublication . Crespo, Maria Virgínia; Rosa, Fernanda; Morgado, Marina; Ferreirinha, Dario; Cerejo, A.; Madeira, MartaEnvironmental contamination by dog faeces in public areas is considered a risk factor to Public Health. Therefore, during a period of five years (2000-2005) a parasitological study on dog faeces was performed in Center-West region of Portugal. Coprological exams were performed. Out of 2806 samples analysed, 792 (28,23%) showed eggs/oocysts of intestinal parasites, with higher prevalences in rural areas (53,35%). Specimen eggs belonging to the families Taeniidae, Dipylidiidae, Ancylostomatidae, Ascarididae, Trichuridae and Spirocercidae and oocysts from Eimeriidae and Sarcocystidae, were identified. The results obtained pointed out to the continuity of prophylactic measures which has already been implemented in the studies areas.
- Ticks on dogs and its role as vectors: intermediate hosts in the Center-West of PortugalPublication . Rosa, Fernanda; Crespo, Maria Virgínia; Ferreirinha, Dario; Morgado, Marina; Madeira, Marta; Santos-Silva, M.; Sousa, R.Dogs are one of the most important hosts in the maintenance of tick population. In order to identify the species and their role on the transmission of hemoparasites and rickettsiae, ticks were collected on 466 dogs of Center- West region of Portugal. Taxonomical studies were done and appositional hemolymph smears were also performed in order to search for rickettsia infections. Some ticks were processed for DNA extraction and screened by PCR for detection of rickettsiae DNA. Specimens of Rhipicephalus sanguineus, R. pusillus, Ixodes spp. and Hyalomma marginatum were identified. Only the first two species were found infected with a rickettsial strain Bar29 and with R. massiliae. These results reinforce the important role of dogs and its ticks on epidemiology of tick-borne rickettsiae agents in Portugal.