CAUSATION: CARDIAC DISEASES
cardiac disease Host factors
CARDIAC DISEASES….Small children can succumb to the disease within a matter of days. Case fatality rates are higher in young infants and
malnourished children. Age-specific mortality rates show wide differences between countries. In general, rates tend to be high in infants and young children, and in the elderly in all countries, although the age group with the highest rates can
differ. In developing countries where malnutrition and low birth weight is often a major problem, the rates in children
tend to be the highest. By contrast, in developed countries respiratory infections are only exceptionally fatal in infants
but are commonly terminal in the elderly.
Upper respiratory tract infections, e.g., common cold and pharyngitis are several times higher in children than in
adults. Rates for pharyngitis and otitis media increase from infancy to a peak at the age of 5 years. Illness rates are
highest in young children and decrease with the increasing age, except in the third decade of life when young adults are
exposed to infection by their own young children. Adult women experience more illness than men. The greater
exposure of women to small children may be responsible for this. Under 3 years of age boys are affected more often and
Risk factors: CARDIAC DISEASES
Many risk factors for respiratory tract infections have been identified. They include conditions but also the housing, level of industrialization and socio-economic not only the climatic development. In developing countries, overcrowded dwellings, poor nutrition, low birth weight and intense indoor smoke pollution underline the high rates. Local mortality rates are of influenza epidemics. Studies in developed countries have shown that higher rate of infection is common in younger sibling of school going children who introduce infection intc the household. Maternal cigarette smoking has also beer linked to increased occurrence of respiratory tract infections during the first vear of life. Children from low socio- economic status tend to have more respiratory infections The infection is more common in preschool children attending day-care centres. The infections tend to be more
common in urban communities than.