ABSTRACT
Background: Asthma in children is difficult to diagnose due to inability of young children to successfully perform spirometry. However some parameters in the spirometry which are relatively effort independent can be very helpful in confirming the diagnosis of asthma. This study was conducted to find out the most commonly affected spirometry parameter in the suspected cases of childhood asthma.Methods: Total 56 children were studied between 7 to 18 years who came for outpatient visit or admitted in the paediatric ward and were clinically suspected to be asthmatic based on asthma predictive index. They were subjected to spirometry in our institute. Baseline and post bronchodilator values of spirometry parameters were studied and analysed using standard statistical tests.Results: Baseline Forced expiratory flow between 25% and 75% of vital capacity (FEF25-75%) was found to be the most commonly affected spirometry parameter in confirming the diagnosis of suspected asthmatics and correlated with the clinical diagnosis of childhood asthma.Conclusions: FEF25-75% can aid in confirming the diagnosis of suspected asthmatic children who are otherwise not treated as asthmatics and remain undiagnosed in view of not meeting the established spirometry criteria for asthma due to poor performance and ignorance of looking at this important and effort independent parameter.
ABSTRACT
The monogenean ectoparasite, Dactylogyrus sp. is a major pathogen in freshwater aquaculture. The immune responses in parasitized fish were analyzed by quantitation of innate immune factors (natural agglutinin level, haemolysin titre, antiprotease, lysozyme and myeloperoxidase activities) in serum and immune-relevant gene expression in gill and anterior kidney. The antiprotease activity and natural agglutinin level were found to be significantly higher and lysozyme activity was significantly lower in parasitized fish. Most of the genes viz., β2-microglobulin (β2M), major histocompatibility complex I (MHCI), MHCII, tumor necrosis factor α (TNFα) and toll-like receptor 22 (TLR22) in gill samples were significantly down-regulated in the experimental group. In the anterior kidney, the expression of superoxide dismutase and interleukin 1β (IL1β) were significantly up-regulated whereas a significant down regulation of MHCII and TNFα was also observed. The down-regulation of most of the genes viz, MHCI, β2M, MHCII, TLR22 and TNFα in infected gills indicated a well evolved mechanism in this parasite to escape the host immune response. The modulation of innate and adaptive immunity by this parasite can be further explored to understand host susceptibility.