Morphology of E. coli

Morphology of E. coli

Morphology of E. coli E. coli is gram-negative (-ve) rod-shaped bacteria. It is 1-3 x 0.4-0.7 µm in size and 0.6 to 0.7 µm in volume. It is arranged singly or in pairs. It is motile due to peritrichous flagella. Some strains are non-motile. Some strains may be fimbriated. The fimbriae are of type 1 … Read more Morphology of E. coli

Morphology of Bacillus cereus

Morphology of Bacillus cereus

Morphology of Bacillus cereus Some of the characteristics are: Bacillus cereus is gram-positive rod-shaped bacilli with square ends. Occasionally may appear gram variable or even gram-negative with age. They are single rod-shaped or appear in short chains. Clear cut junctions between the members of chains are easily visible. Tissue section staining may appear long and … Read more Morphology of Bacillus cereus

Morphology of Clostridium perfringens

Morphology of Clostridium perfringens

Some of the characteristics are: Clostridium perfringens is large rectangular gram-positive bacilli with rounded or truncated ends. It is pleomorphic with straight or curved rods. Size is about 3-8 µm X 0.4-1.2 µm. It is capsulated, non-motile and non-flagellated pathogenic bacteria. It contains spores with central or sub-terminal spores but spores are rarely seen. Endospores … Read more Morphology of Clostridium perfringens

Habitat and Morphology of Acinetobacter baumannii

Habitat and Morphology of Acinetobacter baumannii

Habitat of Acinetobacter baumannii The first Acinetobacter found in soil was discovered in 1911 by M.W. Beijerinck. It is associated with aquatics environment. It has been recovered from soil, water, animals, and humans. Found in the respiratory and oropharynx secretions of infected individuals. Found in hospital environment and accounts for 10% nosocomial infections in ICU. It … Read more Habitat and Morphology of Acinetobacter baumannii

Habitat and Morphology of Gardnerella vaginalis

Habitat and Morphology of Gardnerella vaginalis

Habitat of Gardnerella vaginalis Normal flora in 40% female (small amount) Found in urine Rarely in blood and wound Found in the anorectal flora of healthy adults of both sexes and as well as children. Isolated from normal vagina of reproductive age female & male urethra (partners of women with bacterial vaginosis). Optimum pH for growth … Read more Habitat and Morphology of Gardnerella vaginalis

Habitat and Morphology of Mycoplasma pneumoniae

Habitat and Morphology of Mycoplasma pneumoniae

Habitat of Mycoplasma pneumoniae They are found in the mucosa of upper respiratory tract (UTR) and urogenital tract of humans. Also found in oral cavity. They are also present in sewage, plants, animals, insects, humans and hot springs. They grow slowly than bacteria. They are self-replicating bacteria. They are atypical bacteria. They do not grow … Read more Habitat and Morphology of Mycoplasma pneumoniae

Habitat and Morphology of Mycobacterium leprae

Habitat and Morphology of Mycobacterium leprae

Habitat of Mycobacterium leprae They are found in soil, water and air. Found in the soils where the leprosy infected people live. Most of them are non-pathogenic and non-parasitic. Found in warm tropical countries. Mycobacterium leprae are found in the peripheral nerves of humans. Found in the cold parts of the body like hand, feet … Read more Habitat and Morphology of Mycobacterium leprae

Habitat and Morphology of Streptococcus pneumoniae

Habitat and Morphology of Streptococcus pneumoniae

Habitat of Streptococcus pneumoniae Streptococcus pneumoniae are found worldwide. Found in primates, livestock and felines. They are the part of normal flora of upper respiratory tract infection in humans. Mostly found in throat and nasal passage. They infection mostly children in winter seasons. They are Mesophilic, 30 to 35°C. Morphology of Streptococcus pneumoniae They are … Read more Habitat and Morphology of Streptococcus pneumoniae

Habitat and Morphology of Shigella dysenteriae

Habitat and Morphology of Shigella dysenteriae

Habitat and Morphology of Shigella dysenteriae Habitat of Shigella dysenteriae They are found worldwide. Humans are only the natural host. They are also found in human intestinal tract. They are mostly found in the area where there is overcrowded. Prevalent in low waste management areas and no safe drinking water supply. Houseflies serves as vectors. … Read more Habitat and Morphology of Shigella dysenteriae

Habitat and Morphology of Klebsiella pneumoniae

Habitat and Morphology of Klebsiella pneumoniae

Habitat and Morphology of Klebsiella pneumoniae Habitat of Klebsiella pneumoniae They are found in mouth, skin and intestinal tract of human beings. They are also found in soil, water and sewage. Also found in bowel and respiratory tract of humans and animals. Found in the hands of hospital personnel. They are responsible for community and hospital … Read more Habitat and Morphology of Klebsiella pneumoniae

Habitat and Morphology of Listeria monocytogenes

Habitat and Morphology of Listeria monocytogenes

Habitat and Morphology of Listeria monocytogenes Habitat of Listeria monocytogenes They are the natural pathogens of wide range of animals, birds, fish, ticks and crustacean. They are saprophytic in soil, water, sewage and plants decaying. They occasionally colonizes the human gastrointestinal tract (1-10%). They can be isolated from foods for human consumption, including raw and … Read more Habitat and Morphology of Listeria monocytogenes

Habitat and Morphology of Corynebacterium diphtheriae

Habitat and Morphology of Corynebacterium diphtheriae

Habitat and Morphology of Corynebacterium diphtheriae Habitat of Corynebacterium diphtheriae Found in nasopharynx as well as in skin lesions, which actually represent a reservoir for the spread of diphtheria. Also found in mouth, throat, nose, skin and wound of infected person. Animals do not easily contract diphtheria. Patients carry toxigenic organism upto 3 months after infection. … Read more Habitat and Morphology of Corynebacterium diphtheriae

Habitat and Morphology of Neisseria gonorrhoeae

Habitat and Morphology of Neisseria gonorrhoeae

Habitat and Morphology of Neisseria gonorrhoeae Habitat of Neisseria gonorrhoeae Human is only the natural host. Found in human urogenital tract. Rectal carriage in healthy individuals. Typically seen in pus cells (intracellular) Found intracellularly in polymorphonuclear leukocytes, or a specific category of white blood cells with varying shapes of nuclei. Morphology of Neisseria gonorrhoeae Gram –ve … Read more Habitat and Morphology of Neisseria gonorrhoeae

Habitat and Morphology of Mycobacterium tuberculosis

Habitat and Morphology of Mycobacterium tuberculosis

Habitat and Morphology of Mycobacterium tuberculosis Habitat Human is only the know reservoir. Usually found in the lungs but can also live in any part of the body. They may be obligate pathogen, facultative or opportunistic pathogens or free living. Usually infect the mono-nuclear phagocytes. Can also be infected by the consumption of unpasteurized milk. … Read more Habitat and Morphology of Mycobacterium tuberculosis