Pathogenic Bacteria

Pathogenic bacteria

Pathogenic bacteria are bacteria that cause bacterial infection. Most bacteria are harmless, beneficial or pathogenic. Various diseases such as tuberculosis is causes by pathogenic bacteria. Diseases caused by pathogenic bacteria. Each pathogenic species has a few characteristics with interactions related to humans. Conditionally pathogenic. conditionally pathogenic bacteria only become pathogenic if certain conditions are met. These may vary according to your immune system and injuries. Intracellular. Other organisms¬† may also cause diseases in humans. Obligate intracellular parasites are able to grow and reproduce only within…

Read More »

Retrovirus

Retrovirus

A retrovirus is a single stranded RNA virus that stores its nucleic acid in the form of an mRNA genome. Like all viruses, it’s a parasite. The virus enters the host cell and takes refuge in the cytoplasm. The virus uses its own reverse transcriptase enzyme. This enzyme produces DNA from its RNA which happens in the reverse of the usual pattern. The new DNA is then integrated into the host cell genome by an integrase enzyme. At this point, the retroviral DNA is generally…

Read More »

RNA Virus

RNA Virus

An RNA virus is just as he name implies. It is a virus that has RNA as it’s genetic material. The nucleic acid is generally single-stranded RNA but it may also be double-stranded RNA. The ICTV classification system, classifies RNA viruses as those that belong to Group 3, Group 4 or Group 5of the Baltimore classification system for classifying viruses. It does not consider RNA viruses with DNA intermediates in their life cycle as RNA viruses. Viruses with RNA uses their genetic material that include…

Read More »

DNA Virus

DNA Virus

A DNA virus is a virus that has DNA as its genetic material. It replicates using a DNA-dependent DNA polymerase. The nucleic acid is usually double-stranded DNA. The DNA may also be single-stranded DNA. A DNA virus belongs to either Group 1 or Group 2 of the Baltimore classification system for viruses. Single-stranded DNA is usually expanded to double-stranded in infected cells. Group 7 viruses such as hepatitis B contain a DNA genome. They are not considered to be any form of DNA virus due…

Read More »

Gram Negative Bacteria

Gram negative bacteria

Gram negative bacteria is another type of bacteria. It does not retain the crystal violet stain used in the Gram staining method. The thin peptidoglycan layer of their cell wall is sandwiched between an inner cell membrane and bacterial outer membrane. The process of Gram staining is used in the same manner as with gram positive bacteria. The only difference is that gram negative bacteria will turn red or pink. Characteristics of gram negative bacteria. Gram negative bacteria display he following characteristics: Cell membrane. Thin…

Read More »

Gram Positive Bacteria

Gram Positive Bacteria

Gram positive bacteria are a class of bacteria. They can be identified by their crystal violet stain. This happens when they are subjected to the Gram staining method. It is a method where bacteria is identified. They can either be gram positive or gram negative. The thick peptidoglyan layer in the cell wall retains the stain. This make it possible for definitive identification. Gram negative bacteria cannot retain the violet stain after decolorization. Gram positive bacteria are more receptive to antibiotics. This happens even though…

Read More »

Flesh Eating Bacteria

Flesh Eating Bacteria

Flesh eating bacteria isn’t a joke. It does exist. People tend to believe it’s a movie or video game story. Actually, it is pretty dangerous. The only flesh eating bacteria that exist, is called necrotizing fasciitis. It is a rare infection of the deeper layers of the skin and subcutaneous tissues. The bacteria can spread quite easily through the fascial plane within the subcutaneous tissue. A most consistent feature of this flesh eating bacteria was first described in 1952. It was described as necrosis of…

Read More »

Types of protozoa

Types of protozoa

There are various types of protozoa that people hardly know about. What are their purpose? What do they actually do? Look at our protozoa taxonomy, protozoa structure and our protozoa explanation to learn more. Types of protozoa: Protozoa are classified according to the ways in which they move about. One phylum (the Sarcodina), moves by pushing out portions of their cytoplasm forming pseudopods (“false feet”) in order to propel them forward. They capture their food by extending their pseudopods around it, engulfing it, and digesting…

Read More »

Bacteria vs Virus

Bacteria vs Virus

Bacteria vs virus is a mix characteristics and differences. Each virus is different from each bacteria. What do we know about the differences? How can we explain it? It’s simple. All of the differences of bacteria vs virus will be explained. Definitions Bacteria Virus Bacteria are unicellular organisms. They are typically a few micrometers long. The differences in shapes vary greatly and they include curved rods, spheres, rods and spirals. A virus is a sub-microscopic particle. They can infect the host of a biological organism.…

Read More »

Evolution of fungi

Evolution of fungi

Why the evolution of fungi? The evolution of fungi has been researched for decades. Just like animals and plants, we have studied their evolutionary path through genetic analysis. The evolution of fungi. The evolution of fungi has been going on since fungi diverged from other life around 1,500 million years ago. The glomaleans branched out from the “higher fungi” at ~570 million years ago. This is based on DNA analysis. Fungi most-likely colonised the land during the Cambrian era. From today, that’s over 500 million…

Read More »