Rocky mountain spotted fever is an acute febrile illness caused by Rickettsia rickettsii transmitted to humans by ticks from infected rodents. The disease is mainly prevalent in the Rocky Mountains of America. The same arthropod vector is responsible for other tick borne disease is India, Africa, Central Asia and Far East.… Continue Reading Rocky mountain spotted fever – Causes, Symptoms, Diagnosis and Treatment

Brill-zinsser disease is recrudescence of epidemic typhus which occurs years after the original disease. Organisms are the same (R. prowazekii). The clinical picture resembles epidemic typhus. The Weil-Felix reaction is negative, but diagnosis is established by complement fixation, microscopic agglutination and immuno fluorescent antibody reactions. Treatment is on same lines as… Continue Reading Typhus disease (brill-zinsser) – Causes, Symptoms, Diagnosis and Treatment

Glandular fever (infectious mononucleosis) is an acute infectious disease characterized by high temperature and lymphodenopathy. It is caused by Epstein-Barr virus (HHV-4) and is transmitted in humans through saliva by close contact and is often referred to as ‘Kissing disease’. Glandular fever (infectious mononucleosis) is of worldwide distribution involving mainly young adults.… Continue Reading Glandular fever (infectious mononucleosis) – Causes, Symptoms, Diagnosis and Treatment

Leptospirosis is a zoonotic disease caused by all leptospiras irrespective of their specific serotypes. Leptospira are tightly coiled motile spirochaetcs and are broadly divided into two species – Leptospira Interrogans comprising of all pathogenic strains and Leptospira biflexa which consists of non-pathogenic strains. Of the various serotypes human infection is… Continue Reading Leptospirosis – Causes, Symptoms, Diagnosis and Treatment

Plague is disease which is widely prevalent all over the world but is more common in the subtropical region. It is primarily a disease of rodents (sylvitic plague) and is transmitted to humans by the bite of infected rat flea (xenopsylla cheopis). Sporadic cases as well as epidemics of plague occur… Continue Reading Plague – Causes, Symptoms, Diagnosis and Treatment

Acquired immune deficiency syndrome may be defined as an opportunistic disease as a result of infection with human immunodeficiency virus type-i (HIV-i) which produces progressive deterioration of the immune system of the body and results in development of persistent symptoms ultimately leading to secondary infections, malignancies, neurologic disorders and other… Continue Reading Acquired Immune Deficiency Syndrome (AIDS) – Causes, Symptoms, Diagnosis and Treatment

Gonorrhea is one of the commonest sexually transmitted disease prevalent all over the world. It is caused by a gram negative diplococcus called Neisseria gonorrhea which is found in pairs with adjacent surfaces flattened. A number of strains of neisseria are present and it is differentiated from them by its ability… Continue Reading Gonorrhea- Causes, Symptoms, Diagnosis and Treatment

Syphilis is a systemic disease prevalent all over the world and is due to treponema pallidum, a spirochaete which is usually transmitted by sexual contact. Syphilis may be congenital or acquired which is further divided into three stages. Primary, secondary and tertiary. Primary form is characterized by a primary lesion which… Continue Reading Syphilis – Causes, Symptoms, Diagnosis and Treatment

Malaria is one of the commonest tropical diseases which affect millions of people in many parts of the world. Easy travel and migration of population has introduced the disease in almost all the countries. It is caused by various species of plasmodium, the malarial parasite. Though more than three hundred… Continue Reading Malaria – Causes, Symptoms, Diagnosis and Treatment