avian infectious bronchitis (ib) is a major cause of economic losses in poultry industry. the ib virus primarily affects respiratory tract, but various strains differ in their tropism for other target organs such as kidney and alimentary tract. the objective of this study was to estimate the pathogenicity of iranian ibv variant (ir-1), which is limited exclusively to iran. specific pathogen fre...

It has been shown that nosocomial infections or hospital acquired infections are recurrent problems, identified chiefly in intensive care facilities, surgical, and medical wards. In Trinidad and Tobago information on nosocomial infections are lacking. Within the period 1992-1995, 7,158 nosocomial infections were documented from 72,532 patients (10.0/100 admissions). In Europe, incidences vary f...

Fungal agents, especially yeasts, are resident in digestive system as microflora and they can invade the mucosal tract in animals with predisposing factors. The prevalence of the resident fungal flora in the digestive tract of healthy broilers and layers during April to September 2008 was investigated. The samples were taken from the preventriculus, jejunum and cecum contents of 120 birds and c...

There are some conflicts about constancy of conduction velocity (CV) in a given tract of nervous system. By recording excitatory postsynaptic currents (EPSC) in layer IV of the somatosensory cortex we tried to clear changes in CV of thalamocortical tract of mice aged 3 to 50 days old. Field potentials and EPSC were recorded in the layer IV by stimulation of ventrobasal nucleus of thalamus (VB) ...

The highly conserved nature of the thyroid gland and the thyroid system among mammalian species suggests it is critical to species survival. Studies show the thyroid system plays a critical role in the development of several organ systems, including the reproductive tract. Despite its highly conserved nature, the thyroid system can have widely different effects on reproduction and reproductive ...

Both histologically and anatomically, the respiratory system is a compound having diverse functions. It fulfills process of respiration that regarded as gas exchange through conduction filtration air. The functionally divided into conducting parts.Anatomically, tract categorized upper lower tract. represents organs within thorax such trachea, bronchi, bronchioles, alveolar duct, alveoli which m...