Essays on Leishmaniasis

Analysis of Diseases

Overview Chikungunya (CHIK) refers to a re-emerging arboviral disease transmitted by the mosquitos Aedes aegypty and Aedes albopictus (Pialoux 318). The virus belongs to the genus Alphavirus and family Togaviridae. The word chikungunya derives from Makonde language (spoken in Tanzania and northern Mozambique), where it means “to walk bent over” (Halstead 557). This name refers to the main feature of both chronic and acute phase of the disease a change in posture causes by the arthritis and arthralgia (Charrel, Lamballerie and Raoult 769).

History

The disease gained its name after the outbreak in Tanganyika, the modern Tanzania in 1952. However, ...

Chapter 4: Prokaryotic Cells and microorganisms

This chapter looks at the morphology, and pathogenic mechanisms of prokaryotic cells and microorganisms respectively. It discusses in detail the structural components, functions of the different organelles of prokaryotic cells as well as feeding and survival mechanisms of prokaryotic microorganisms.

Prokaryotic cells have a specialized cellular structure. Prokaryotes are unicellular and their cells have no cellular organelles, that is, a membrane does not surround their nucleus. These cells contain intricate phospholipids, sterols, and sphingolipids. They are typically 1-5µm in diameter .

Their outer surface is covered by glycocalyx, which is a gel like cellular envelope that provides prokaryotic cells with protection against ...