Sourav Pan
What is Shigella? Shigella is a genus of Gram-negative, facultatively anaerobic, rod-shaped bacteria that is non-motile and non-spore-forming. It belongs to the Escherichia genus and was discovered by Kiyoshi Shiga in 1897. Shigella is a major cause of dysentery and primarily infects humans and certain primates, such as gorillas. This pathogen is not known to … Read more
What is Genus Salmonella? Scientific classification Domain: Bacteria Phylum: Pseudomonadota Class: Gammaproteobacteria Order: Enterobacterales Family: Enterobacteriaceae Genus: Salmonella History of Salmonella The discovery and study of Salmonella have significantly advanced our understanding of bacterial pathogens. Below is a breakdown of key historical milestones in the study of this genus. Geographical Distribution and Habitat of S. Typhi … Read more
What are Nonsporing anaerobes? Classification of Non-Sporing Anaerobes Non-sporing anaerobes are microorganisms that thrive without the need for oxygen and do not produce spores. Based on their morphology and staining properties, these bacteria are classified into several categories. Here’s a breakdown of how they are classified according to their Gram reaction and structure: Gram-Negative Bacilli: … Read more
What is Corynebacterium diphtheriae? Scientific classification of Corynebacterium diphtheriae Domain: Bacteria Phylum: Actinomycetota Class: Actinomycetia Order: Mycobacteriales Family: Corynebacteriaceae Genus: Corynebacterium Species: C. diphtheriae Geographical Distribution and Habitat of Corynebacterium diphtheriae Corynebacterium diphtheriae is the causative agent of diphtheria, and its distribution is heavily influenced by geographic, environmental, and immunization factors. Here’s a breakdown of where … Read more
What is Streptococcus pyogenes? Classification of Streptococcus Streptococcus species are diverse bacteria that are classified based on their oxygen requirements, hemolytic activity, and antigenic structure. These classifications provide a framework for identifying different types of streptococci and understanding their roles in human health and disease. Classification by Oxygen Requirement Classification Based on Hemolysis on Blood … Read more
What is Neisseria meningitidis? Geographical Distribution of Neisseria meningitidis Neisseria meningitidis, the bacteria responsible for meningococcal disease, is a global threat. However, its impact varies across different regions, with certain serogroups causing more significant outbreaks and epidemics than others. The distribution of this pathogen is not uniform, and the occurrence of cases is often influenced … Read more
What is Neisseria gonorrhoeae? Morphology of Neisseria gonorrhoeae Neisseria gonorrhoeae is a Gram-negative bacterium that presents a distinctive morphology. It exhibits unique structural features that help in its identification and understanding of its pathogenic mechanisms. These structural features give N. gonorrhoeae the tools it needs to infect and persist in the human body, leading to … Read more
What is Global Warming? Definition of Global Warming Global warming is the long-term increase in Earth’s average surface temperature, primarily caused by the buildup of greenhouse gases like carbon dioxide and methane due to human activities such as burning fossil fuels and deforestation. This leads to climate changes and various environmental impacts. Causes of Global … Read more
What is Deforestation? Definition of Deforestation Deforestation is the large-scale removal of trees from forests or natural landscapes, often to repurpose the land for agriculture, urban development, or industrial use, leading to habitat loss, decreased biodiversity, and increased carbon emissions. Importance of Forests Forests are essential to the health of the planet, playing a critical … Read more
What is Decomposition? Definition of Decomposition Decomposition is the process by which organic matter breaks down into simpler substances, typically by the action of microorganisms like bacteria and fungi, releasing nutrients, carbon dioxide, and water back into the environment. Types of Decomposition Decomposition happens in two main types: abiotic and biotic. Each plays a distinct role in breaking … Read more
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