Essays on Intermediate Host

Question1

An animal is a multi-cellular organism with cells that are not enclosed in a rigid cell wall. Animals differ from other organisms in two major aspects: 1) through the structure of their cell wall and (2) through their feeding habits. For example, unlike other organisms, such as plants, animals do not have a rigid cell wall. Plants on the other hand have a rigid cell wall. In terms of nutrition, animals are heterotrophs because of the way they synthesize organic compounds. Plants, on the other hand, are autotrophs. Plants are classified as autotrophs because they synthesize organic molecules directly using energy from ...

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 ...

Introduction

In the world, vectors are primary host for diseases pathogens. Vectors are very important in spread of diseases because they act as intermediate host to pathogen, also help in completion of pathogen life cycle. Control of vector by epidemiology has shown result in reduction of infections that spread by vectors. Epidemiology is a branch of science that deals with diseases and there control. Below is a summary of surveillance and control of some vectors.

Vector surveillance

Dengue virus is always associated with mosquitoes Aedes Aegyptis and these is the main target in control and the surveillance of this diseases. Surveillance is done to ...