Nonspecific reactivity of the rabbits organism when exposed to cysticercosis

Abstract

One of the actual rabbits breeding problem is the reduction of their resistance, which is caused by the spread of individual invasive diseases, especially cysticercosis, which is caused by the larval Cysticercus pisiformis stage of the mature cestode Taenia pisiformis. The study was conducted on 38 male rabbits age 3–4 months, weighing 3.5–4.0 kg of the Californian breed, selected by analogy. Animal were separated into two groups: healthy animals (control group) and sick animals (research group). After blood collection, slaughter was conducted and the presence of cysticercus cysts was visually determined in the organisms of the rabbits. Control animals received a balanced standard granular feed and water without limit; research group in addition to the standard granulated feed with water received flaccid hay. The animals were kept in mesh single-tier cages in the room, according to the current veterinary and sanitary standards. The definition of phagocytic activity of neutrophils was carried out with the addition of standardized to 2500000000/ml suspension of daily culture of E. coli 055K59№3912/41. The bactericidal activity of blood serum was determined by the method Smirnova A.V. and Kuzmina T.A. in relation to the E. coli microbial test-culture 055K59№3912/41. The serum lysozyme activity was determined by the Nephelometric method using the Dorofachuk V.G. method to the microbial test culture Micrococcus luteus ATSS9341. Circulating immune complexes were determined using polyethylene glycol in borate buffer (pH 8.4). It was found that in blood of sick animals phagocytic activity is lower than in blood of healthy ones (respectively, 41.82 ± 1.51% versus 47.38 ± 1.10%, P < 0.01). The main cells involved in phagocytosis are leukocytes, in particular neutrophils and eosinophils. A low indicator of phagocytic activity shows depressed phagocytosis in the organism of animals suffering from cysticercosis of rabbits. The phagocytic number in the blood of rabbits of the experimental group was significantly lower by 0.51 units (P < 0.05) as compared to the control group and correlated with the index of phagocytic activity. An important element of immunity are indicators of bactericidal and lysozyme activity of blood serum. Low bactericidal activity of serum by 12.88% (P < 0.01) and lysozyme activity in rabbits with Cysticercus pisiformis also indicates a weakening of the factors of nonspecific natural resistance of the organism. Analyzing the level of circulating immune complexes, we found a high level of medium (9.14 ± 0.40 vs 5.58 ± 0.50) and small (9.21 ± 1.35 vs 4.64 ± 0.68) CIC for cysticercosis, respectively, 1.64 (P < 0.01) and 1.98 times (P < 0.001) against the control. This indicates the inhibition of the immunobiological activity in the organism of rabbits as a result of the combination of specific antibodies with the products of the exchange of helminths.