Corynebacterium Diphtheriae Disease Corynebacterium diphtheriae is a causative agent of diphtheria.It is upper respiratory tract illness and it is a contageous disease. 1. Morphology It is a Gram positive, non-motile, non spore forming bacteria. Corynebacteria is non- capsulated slender rod. It shows club shaped swelling and hence called as Corynebacteria. Its size ranges from 3-6 μm in lenght and 0.6-0.8 μm… Read More


Infection and its Types in Microbiology Infection Infection is a condition of host in which parasite lives, multiplies in the host body. Infection normally occurs when a parasite is very active and it suppresses the host defense mechanism. Depending upon the nature of host, parasite and the persistence of the disease the infection is divided into following types. 1.… Read More


Diseases and its Types in Microbiology Diseases The disease is an abnormal condition an uneasy state of the body. The human body is constantly exposed to micro-organism sometime these micro-organisms are so active that they enter the host body, multiply and result in a disease. Diseases are mainly of four types as shown below. 1.… Read More


Basics of Medical Microbiology Medical microbiology deals with studying the relationship between host and parasite and understanding the causative agent of disease. In our daily life, human beings are constantly exposed to micro-organisms. The interaction between human and micro-organisms may be useful or harmful interaction. Parasitism can be explained a condition in which microbial population… Read More


Neisseria Gonorrhoeae Disease Neisseria gonorrhoeae (Gonococci) Neisseria gonorrhoeae is a venereal disease 1. Morphological characters They are gram negative,non-sporeforming diplococci with concave adjacent side. It appear like a shape of a kidney. It contains pili that provide adhesion to mucosal surface and inhibit phagocytosis. 2. Cultural characters These gonococci cells grow aerobically as well as anaerobically. These organism can… Read More


 Neisseria meningitidis. Introduction It is a gram negative, non-motile cocci arranged in pairs called as diplococci. Neisseria are aerobic, non-sporulating, oxidase positive cocci. Neisseria meningitidis causes cerebrospinal fever that is Meningococcal meningitis. 1. Morphological characters They are gram negative,spherical shape cocci with flattened adjacent side. Its size ranges from 0.6-0.8 micrometer. Its size,shape and staining… Read More


Disease caused by Streptococcus pneumoniae The Streptococcus pneumoniae is gram-positive lancet shape bacteria. It may be diplococcus or streptococcus. Pneumococcus is non-motile, non-spore forming capsulated bacteria. They may be aerobic or facultative anaerobic in nature. They are a normal inhabitant of human respiratory tract Pneumococcus bacteria may be an important cause of pneumonia, otitis, sinusitis, bronchitis,… Read More


Medical Microbiology Medical microbiology is a branch of science that deals with the study of of pathogenic micro-organisms and is concern with disease, diagnosis ,prevention, control and treatment. Diseases caused by micro-organisms Staphylococcus aureus 1. Morophology Staphylococcus aureus are gram-positive spherical cocci approximately 1 micrometer in diameter.These cells may be arranged in singly,in pairs,shorts chains or in… Read More