Quarrying is an activity contributing to the vitality of the Moroccan economy. However, most of these quarries were abandoned at the end of extraction and became dump and later a place of uncontrolled landfills. The n...Quarrying is an activity contributing to the vitality of the Moroccan economy. However, most of these quarries were abandoned at the end of extraction and became dump and later a place of uncontrolled landfills. The number of restored or rehabilitated quarries is limited and this threatens several aspects of the environment, especially, the quality of surface and ground water, landscape, forests, etc. This also gives rise to increased erosion risk. The study identifies plant species covering 10 abandoned quarries in the region of Rabat, especially the Bouregreg River and its affluent Akreuch in order to define a strategy for their restoration or rehabilitation. Field surveys were led to locate and map 10 abandoned quarries and to sample plant species. Herbaria were established and species were identified and classified. The results of the study distinguished 46 different plant species spread over 45 genera and 27 botanical families. The most dominant family in the quarries visited is Asteraceae. These results will allow us to study the vegetation dynamics in these abandoned lands and serve as a basis, in the selection of appropriate species in eventual restoration or rehabilitation projects.展开更多
Mycoplasma capricolum subsp.capricolum(Mcc)is an important etiological agent of contagious agalactia(CA).CA affects small ruminants and is characterized by inducing mastitis,arthritis,kerato-conjunctivitis and respira...Mycoplasma capricolum subsp.capricolum(Mcc)is an important etiological agent of contagious agalactia(CA).CA affects small ruminants and is characterized by inducing mastitis,arthritis,kerato-conjunctivitis and respiratory symptoms.The aim of this study was to isolate and characterize Mcc from Moroccan goats with contagious agalactia.A total of 300 Alpine goats were monitored.Serology analysis,molecular identification,and isolation of Mcc were realized from suspected goats.An experimental study was conducted for isolated Mcc to determine their pathogenicity.Thus,clinical observation showed that respiratory symptoms were predominant in young animals,and other symptoms,such as mastitis,keratoconjunctivitis and lameness,were more frequently detected in adult goats.Of the 80 tested blood samples,28 sera were seropositive for Mcc antibodies.Mcc was identified by polymerase chain reaction(PCR)in milk,lung tissue and synovial liquid samples.The isolation of Mcc was successful through bacterial culture from lung tissue.LppA gene sequence of this strain revealed 98.1%similarity with the reference strain(ATCC 27343),with 11 missense variants.Experimental infection resulted in severe and generalized CA disease in sheep and goats,confirming the high pathogenicity of the Moroccan Mcc isolate.展开更多
文摘Quarrying is an activity contributing to the vitality of the Moroccan economy. However, most of these quarries were abandoned at the end of extraction and became dump and later a place of uncontrolled landfills. The number of restored or rehabilitated quarries is limited and this threatens several aspects of the environment, especially, the quality of surface and ground water, landscape, forests, etc. This also gives rise to increased erosion risk. The study identifies plant species covering 10 abandoned quarries in the region of Rabat, especially the Bouregreg River and its affluent Akreuch in order to define a strategy for their restoration or rehabilitation. Field surveys were led to locate and map 10 abandoned quarries and to sample plant species. Herbaria were established and species were identified and classified. The results of the study distinguished 46 different plant species spread over 45 genera and 27 botanical families. The most dominant family in the quarries visited is Asteraceae. These results will allow us to study the vegetation dynamics in these abandoned lands and serve as a basis, in the selection of appropriate species in eventual restoration or rehabilitation projects.
文摘Mycoplasma capricolum subsp.capricolum(Mcc)is an important etiological agent of contagious agalactia(CA).CA affects small ruminants and is characterized by inducing mastitis,arthritis,kerato-conjunctivitis and respiratory symptoms.The aim of this study was to isolate and characterize Mcc from Moroccan goats with contagious agalactia.A total of 300 Alpine goats were monitored.Serology analysis,molecular identification,and isolation of Mcc were realized from suspected goats.An experimental study was conducted for isolated Mcc to determine their pathogenicity.Thus,clinical observation showed that respiratory symptoms were predominant in young animals,and other symptoms,such as mastitis,keratoconjunctivitis and lameness,were more frequently detected in adult goats.Of the 80 tested blood samples,28 sera were seropositive for Mcc antibodies.Mcc was identified by polymerase chain reaction(PCR)in milk,lung tissue and synovial liquid samples.The isolation of Mcc was successful through bacterial culture from lung tissue.LppA gene sequence of this strain revealed 98.1%similarity with the reference strain(ATCC 27343),with 11 missense variants.Experimental infection resulted in severe and generalized CA disease in sheep and goats,confirming the high pathogenicity of the Moroccan Mcc isolate.
