The present study was carried out on 15 pit animals (10 dogs and 5 cats), suffering from the presence of respiratory tract foreign bodies. Case history and clinical signs were reported. Diagnosis was confirmed by radiography and endoscopy. Endoscopy was used in the diagnosis and removal of foreign bodies from the respiratory tract. The procedure was successful in 14 of the examined cases. In one case where the foreign body was lodged in the lung tissue, endoscopy failed to remove the foreign body. Results of this study showed that endoscopy can be used successfully in the diagnosis and removal of foreign bodies from the respiratory tract. The technique is non-invasive and safe for the patient.

Tetracycline has proven to be effective in the management of the different types of corneal ulcers. It has antimicrobial activity as well as an anti-collagenase effect. Therefore, the present study was conducted to investigate the effect of oxytetracycline 5% on the alkali burn corneal ulcer after its injection subconjunctivally. Ten healthy New Zealand albino rabbits were divided into equal groups (control and treatment). They were examined carefully before induction of the ulcer using 1% NaOH in the right eye. 0.5 ml of oxytetracycline 5% was injected into the subconjunctival space weekly for 5 consecutive weeks. The eye was examined weekly clinically and by fluorescein staining dye just before the injection of oxytetracycline. At the end of the study, the rabbits were euthanised, and the eyes were harvested for histological and electron microscopic examinations. The results revealed there were no significant variations between the control and treatment groups except for the prevention of bacterial colonisation on the ulcerated corneal surface in the oxytetracycline group.

The present study concluded that the subconjunctival injection of oxytetracycline was not efficient for the management of alkali burn corneal ulcers, but it could be used as an adjunctive treatment for control and prevention of bacterial growth on the ulcerated corneal surface.

Stir-casting was employed to create Al-5.6Zn-2.2Mg-1.3Cu composites with particle sizes ranging from 30 to 90 μm and a weight fraction of 5–15 SiC articles. The mechanical and wear properties of the material have been assessed. The wear behaviour of Al-5.6Zn-2.2Mg-1.3Cu composites was investigated using dry pin-on-disc wear testing. Various loads (20 N–60 N), speeds (2 m/s–6 m/s), and sliding distances (2000 m–4000 m) were used in the sliding wear experiments. In the experimental process, XRD, SEM, and EDX were used to characterise the microstructures and materials of diverse composites. Uniform dispersion of the SiC particles is clearly observed in the SEM image. The microhardness of SiC particles increases by 13% when the weight percent of SiC particles is increased from 5% to 15%. SiC particles outperform tiny SiC particles in terms of wear resistance. With increasing load, the particular wear rate showed an increasing trend (20–60 N). The wear rate of the composite lowers as the weight percentage reinforcement increases (5 wt.% to 15 wt.%), and the wear rate of the composite increases when the particle size (30 μm–90 μm) increases. The results demonstrated that composites supplemented with coarse SiC particles outperform those supplemented with fine SiC particles in terms of wear resistance.