How does bacteria cause infection in plants?
The means by which plant pathogenic bacteria cause disease is as varied as the types of symptoms they cause. Some plant pathogenic bacteria produce toxins or inject special proteins that lead to host cell death or they produce enzymes that break down key structural components of plant cells and their walls.
What are the 7 processes in disease cycle?
The chain of events involved in disease development includes inoculation, penetration, infection, incubation, reproduction, and survival (Figure 70).
What is the pathophysiology of bacterial infection?
The pathogenesis of bacterial infection includes initiation of the infectious process and the mechanisms that lead to the development of signs and symptoms of disease.
What are the steps of bacterial pathogenesis?
To cause disease, a pathogen must successfully achieve four steps or stages of pathogenesis: exposure (contact), adhesion (colonization), invasion, and infection.
Which of the following is a plant disease caused by bacteria?
Black rot of crucifers is caused by Xanthomonas campestris which is a bacterial disease. It is characterized by the symptoms such as V-shaped lesions along the veins and even plants may die prematurely.
Which one of the following is a plant disease caused by bacteria?
Detailed Solution. The correct answer is Citrus canker.
What are the six stages of the disease cycle?
The phases of the disease cycle are:
- survival.
- spore germination and infection.
- early root disease development.
- late root disease development.
- spread.
- foliar disease development.
- production of survival structures.
What is infection in plant pathology?
Infection is the establishment of a parasite on or within a host cell or tissue. The infection court is a certain part of a given plant that is susceptible to a particular pathogen or pathogens. Successful infections usually result in the appearance of disease symptoms.
What are bacterial infections?
A bacterial infection occurs when bacteria enter the body, increase in number, and cause a reaction in the body. Bacteria can enter the body through an opening in your skin, such as a cut or a surgical wound, or through your airway and cause infections like bacterial pneumonia.
What are some types of bacterial infections?
Pneumonia, meningitis, and food poisoning are just a few illnesses that may be caused by harmful bacteria. Bacteria come in three basic shapes: rod-shaped (bacilli), spherical (cocci), or helical (spirilla). Bacteria may also be classified as gram-positive or gram-negative.
What are the three phases of infection process?
The different phases in infections include: Infective period. Communicability period.
What are the stages of infectious process?
The five periods of disease (sometimes referred to as stages or phases) include the incubation, prodromal, illness, decline, and convalescence periods (Figure 2). The incubation period occurs in an acute disease after the initial entry of the pathogen into the host (patient).