Soil-transmitted helminth infections are among the most common infections worldwide and affect the poorest and most deprived communities. They are transmitted by eggs present in human faeces which in turn contaminate soil in areas where sanitation is poor.
A species is a distinct group of animals or plants that have common characteristics and can breed with each other. Your pet Fido is a member of the dog species. All members of the same species have similar genes and can interbreed and produce offspring. A subspecies is a division of a species, and a genus includes several different species. Biologists use these categories to classify organisms, usually with Latin names like Canis familiaris, or domestic dog..
In biology, a species (abbreviated sp. , with the plural form species abbreviated spp. ) is one of the basic units of biological classification and a taxonomic rank.pecies hypothesized to have the same ancestors are placed in one genus, based on similarities. The similarity of species is judged based on comparison of physical attributes, and where available, their DNA sequences.