Agent host environment interaction

Infectious diseases are usually classified by agent on the basis of biological features (categories of metozoa, protozoa, bacteria, fungi, rickettsia, viruses) (Benenson, 1990). The agent enters the human host through portals such as the respiratory tract, gastrointestinal tract, genitourinary tract, conjunctiva, or skin and tissue. Studies in intensive care units (ICUs) have shown that Gram-negative colonization of tracheal aspirate, mouth, peri-anal skin or urine significantly increases the morbidity and mortality of ICU patients (Shekelle et al, 1999).

Environment and natural resource management of Bangladesh

Human lives and livelihood in Bangladesh are intricately intertwined with nature. Consequently, no process of development and eradication of poverty can be conceived of without putting caring for environment and sustainable development at the centre stage. On the other hand, as the poor depend heavily on nature for their livelihood, without the whole-hearted involvement of the poor, caring for environment becomes an extremely difficult task. Bangladesh is a signatory of the Multilateral Environmental Agreement by which government is committed to undertake certain environmental management actions which will be largely beneficial to the poor.

The administrative environment in education

Educational aims are an inevitable source of conflict to between people in the institution and between them and members of the wider society consequently, society has to devise means for controlling the educational system. At the formal level it happens though the operation of local educational government, and other voluntary bodes. It also happens in a way bes described by pointing out that the incumbents of the status positions in the educational system are also product of the wider society Consequently we can never assume that the school is separate from society - it is that the school is separate from society - society own with column runs it.k Cause this organic aspect or the educational system is fairly obvious we can spend more time on analyzing the formal control of education.

The Social environment of the institution of education

Two aspects of social environment are important in the study of education –taht of the child and that of the system . This is not to say, of course, that there are two environments, but only that there are two important perspectives from which the social process may be viewed in both cases the environmental consists of intersecting and overlapping social groups and institutions. In looking at the school as a social establishment. surrounded by other groups we have to discover the extent to which it is able to control its own life There is however. a much more complicated level at which the influencing takes place, in this case, we have to look, at the extent to which the value –system and behavior bitterns oof outside groups interpenetrate those held by the personnel of the school. A simple diagram illustrates relations between the four elements. Relationships.