In this article we will discuss about the functions of alimentary tract, explained with the help of suitable diagrams. In most of the cases of foodborne illness we consider, the pathogenic (disease producing) effect occurs in the alimentary tract giving rise to symptoms such as diarrhoea and vomiting. Since these are essentially a dysfunction of the gut, a useful starting [...]
The following points highlight the ten important landmarks in the history of microbiology. Some of the landmarks are: 1. Discovery of Microscope 2. Discovery of Microbial Life 3. Abiogenesis Versus Biogenesis 4. Fermentation; Pasteurization 5. Germ Theory of Disease 6. Pure Culture Concept and Other Microbial Techniques 7. Growth of Medical Microbiology and Others. Landmark # 1. Discovery of Microscope: [...]
There are three groups of photosynthetic bacteria: cyanobacteria, purple bacteria, and green bacteria. The cyanobacteria differ most fundamentally from photosynthetic purple and green bacteria in being able to carry out oxygenic photosynthesis (Section 6.8); the purple bacteria and green bacteria use an-oxygenic photosynthesis carried out with bacteriochlorophylls and other accessory pigments. Here the discussion is restricted only to purple and [...]