Mycoplasma pneumoniae, often referred to as “walking pneumonia,” is a fascinating bacterium that challenges conventional understanding of infectious diseases. Despite its diminutive size and lack of a cell wall, Mycoplasma pneumoniae is responsible for a significant proportion of community-acquired pneumonia cases worldwide. In this blog post, we embark on a journey to unravel the mysteries…
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Treponema pallidum, the bacterium responsible for syphilis, has captivated the attention of scientists and healthcare providers for centuries. This ancient pathogen continues to pose significant challenges to public health due to its complex clinical manifestations and potential for long-term complications. In this blog post, we embark on a journey to unravel the mysteries surrounding Treponema…
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In the realm of infectious diseases, some adversaries remain ever-persistent, lurking in the shadows of human health. One such formidable foe is Bordetella pertussis, the bacterium responsible for causing whooping cough. Despite medical advancements, this ancient ailment continues to pose a significant threat, especially to infants and young children. In this blog post, we embark…
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Coronavirus belongs to the family of viruses that causes acute respiratory illness and the common cold, severe acute respiratory syndrome(SARS) and middle east respiratory syndrome(MERS). In December 2019, a new type of coronavirus was identified which originated from Wuhan, China. This virus is named as novel coronavirus-2019. They consist of a core of genetic material…
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Neisseria meningitidis is a gram-negative diplococcus 0.6-1.5 µm in diameter. These are considered true human pathogens. Because Virulence Factors of Neisseria Meningitidis These organisms possess pili and adhesions for adherence to host cells. They also produce endotoxins and resist destruction within phagocytes. Neisseria meningitidis also produces a capsule to resist phagocytic engulfment. because Are you a…
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Streptococcus anginosus may be a beta-hemolytic or non-hemolytic organism. It can ferment glucose or lactose, therefore it has a caramel odor as a distinct feature. Colonization This organism colonizes at the following sites in the human body: Intestinal Tract Urinary tract WATCH WORLD’S BEST VIDEO LECTURE ON THIS TOPIC (SIGNUP REQUIRED) Infections Caused By…
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Streptococcus Bovis was known as Streptococcus Gallolyticus. It is a gram +ve bacilli and has a pathogenic nature. Therefore it causes multiple diseases such as colorectal cancer, endocarditis, and urinary tract infection. It is catalase test -ve. It is also an oxidase test -ve organism, therefore it does not produces hydrogen-peroxide upon oxidase test. Colonization This…
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Streptococcus agalactiae is a gram +ve cocci and causes beta-hemolysis of RBCs in the blood agar. It is a catalase -ve bacterium and therefore it does not respond to the catalase test. It has a polysaccharide capsule because of what, it is of more pathogenic nature. Colonization As this bacteria is pathogenic to humans, therefore it…
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Pneumonia is an inflammatory condition of the lung affecting primarily the small air sacs known as alveoli. Typically symptoms include some combination of a productive or a dry cough, chest pain, fever, and trouble breathing. Cause of Pneumonia: Bacteria Viruses Less commonly by fungi and parasites Bacteria: These includes: Streptococcus pneumoniae In nearly 50% of cases Haemophilus influenzae…
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Streptococcus pyogenes is a species of Gram-positive bacteria. These bacteria are aerotolerant and are made up of non-motile and non-sporing cocci. Therefore they are clinically important in human illness. Epidemiology: Throat Genital mucosa Rectum Skin 1% to 5% of healthy individuals have the throat, vaginal, or rectal carriage because it is the site of their…
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