Microscopy of bronchial aspirate showing gram-positive bacilli. A 71-year-old male with a history of chronic obstructive pulmonary disease (COPD) developed fever, anorexia, and shortness of breath. He ...

A recent study published in Cell Reports Medicine has identified distinct microbial signatures within the oral cavity and gut that serve as robust biomarkers for the early detection of gastric cancer ...

Staphylococcus aureus bacteria are pathogens to both man and other mammals. They are gram positive bacteria that are small round in shape (cocci) and occur as clusters appearing like a bunch of grapes ...

Gram staining was developed in the 1800s as a quick and simple procedure to distinguish between Gram positive and Gram negative bacteria. It is one of the first laboratory techniques taught to ...

A maternal response to ascending bacterial infection often results in neutrophilic infiltration of the placental membranes and chorionic plate (chorioamnionitis). Conversely, acute vasculitis of ...

There are many ways of classifying bacteria. One method is based on the cell membrane. In 1884, a bacteriologist named Christian Gram created a test that could determine if a bacterium had a thick, ...

Most species of bacteria can be broadly divided into two groups, known as gram-positive and gram-negative. These categories reflect big differences in the microbes' biology, and they also dictate how ...