[A comparative study of phenoloxidase activity between and ].

Objective: To study the differences of the phenoloxidase (PO) relative activity among ribbed shelled , smooth shelled and .

Methods: The crude PO fluid was extracted from the soft tissue of and by homogenation and centrifugation. The PO activity was detected with catechol as the substrate in the reaction systems.

Transcriptome sequencing and differential gene expression analysis of the schistosome-transmitting snail Oncomelania hupensis inhabiting hilly and marshland regions.

The freshwater snail Oncomelania hupensis is the unique intermediate host of the blood fluke Schistosoma japonicum, which is the major cause of schistosomiasis. The snail inhabits two contrasting environments: the hilly and marshland regions. The hilly snails are smaller in size and have the typical smooth shell, whereas the marshland snails are larger and possess the ribbed shell.

[Progress of researches on lysozyme and its expression in Oncomelania hupensis].

Lysozyme generally exists in animals, plants and microorganisms, and it is used as a natural anti-infection material and one of the important non-specific immune factors in organisms. This paper reviews the progress of researches on its classification, gene structure and function, and expression regulation in Oncomelania hupensis, and on the factors affecting its activities in recent years, in order to further discuss its distribution in O. hupensis.

[Relationship between Yangtze River floodplain micro ecological environment and distribution of Oncomelania hupensis snails].

Objective: To explore the relationship between the Yangtze River floodplain ecological environment (vegetation, soil, water and light intensity) and the distribution of Oncomelania hupensis snails, so as to provide the evidence for ecological snail control.

Methods: Three regions (the Lu-Gang Bridge, Dragon Nest Lake in the bund, and Dragon Nest lake beach) were selected to investigate the plant characteristics (species, height, coverage, frequency and strain of clusters), soil characteristics (temperature, humidity, light intensity) and pH value. All the results were analyzed statistically with SPSS 18 software.