COPD

COPD is a group of diseases characterized by limitation of airflow in the airway that is not fully reversible. COPD is the umbrella term for chronic bronchitis and/or emphysema.  In COPD the airways…

STDs

Chancroid: Cause: Chancroid is caused by a pleomorphic gram-negative rod called Haemophilus ducreyi. Symptoms: this ulcerative disease usually beings as a soft apule, or bump, at the point of contact and develops into…

Photosynthesis

Introduction: Photosynthesis occurs in a wide variety of organisms and it comes in different forms. These include a form of photosynthesis that does not produce oxygen (anoxygenic) and a form…

Antibiotics

Classes of Antibiotics: Beta-lactam antibiotics are the most widely used class of drugs for the treatment of bacterial infections. They include penicillin and its derivatives, such as methicillin and amoxicillin. The beta-lactam ring portion of…