The use of haematological techniques to assess fish health is generally accepted. The aim of the current study was to determine selected haematological changes that occur in Clarias gariepinus (Burchell, 1822). infected with trypanosomes. Blood films were prepared according to standard techniques to confirm trypanosome infections and whole blood was collected, the serum and plasma separated, and prepared for albumin and total protein concentration analysis. Plasma albumin levels were significantly higher in infected wild caught fish than in uninfected wild caught fish and uninfected breeding stock. Serum albumin levels were significantly lower in infected wild caught fish when compared to uninfected breeding stock. The total plasma and serum protein levels were within the normal range for C. gariepinus, that is, 3 g – 6 g/100 mL. The total plasma protein levels varied significantly between the three groups. However, the total serum protein levels were only significantly different between uninfected breeding stock and uninfected wild caught fish, as well as uninfected breeding stock and infected wild caught fish. The total protein levels were significantly higher in infected wild caught fish than in the other groups, a possible indication of an infection or inflammatory host response.

The use of haematological techniques to assess fish health is generally accepted. The aim of the current study was to determine selected haematological changes that occur in Clarias gariepinus (Burchell, 1822). infected with trypanosomes. Blood films were prepared according to standard techniques to confirm trypanosome infections and whole blood was collected, the serum and plasma separated, and prepared for albumin and total protein concentration analysis. Plasma albumin levels were significantly higher in infected wild caught fish than in uninfected wild caught fish and uninfected breeding stock. Serum albumin levels were significantly lower in infected wild caught fish when compared to uninfected breeding stock. The total plasma and serum protein levels were within the normal range for C. gariepinus, that is, 3 g – 6 g/100 mL. The total plasma protein levels varied significantly between the three groups. However, the total serum protein levels were only significantly different between uninfected breeding stock and uninfected wild caught fish, as well as uninfected breeding stock and infected wild caught fish. The total protein levels were significantly higher in infected wild caught fish than in the other groups, a possible indication of an infection or inflammatory host response.

In this review, the main gastrointestinal nematodes infecting cattle in Zimbabwe and the epidemiological factors influencing their occurrence are reviewed and discussed. Nineteen gastrointestinal nematode species that belong to seven families have been found to occur in cattle in Zimbabwe. The main genera reported to date are Cooperia, Haemonchus, Trichostrongylus and Oesophagostomumand the dominant species are Cooperia pectinata, Cooperia punctata, Haemonchus placei and Trichostrongylus axei. The mixed infection by several species from the genera is the cause of parasitic gastroenteritis in cattle in Zimbabwe. Production and husbandry practices, season, host age and environment are considered to be the main factors that influence gastrointestinal nematode infection in cattle. The geographical distribution of the gastrointestinal nematodes is also reviewed in relation to the climatic conditions of the country. Various control options are discussed and how they are applicable to the Zimbabwean situation. Based on reports and existing data on the epidemiological features of the gastrointestinal nematode infection in cattle, practical control measures are critically reviewed and recommendations are made for a national control programme.

In this review, the main gastrointestinal nematodes infecting cattle in Zimbabwe and the epidemiological factors influencing their occurrence are reviewed and discussed. Nineteen gastrointestinal nematode species that belong to seven families have been found to occur in cattle in Zimbabwe. The main genera reported to date are Cooperia, Haemonchus, Trichostrongylus and Oesophagostomumand the dominant species are Cooperia pectinata, Cooperia punctata, Haemonchus placei and Trichostrongylus axei. The mixed infection by several species from the genera is the cause of parasitic gastroenteritis in cattle in Zimbabwe. Production and husbandry practices, season, host age and environment are considered to be the main factors that influence gastrointestinal nematode infection in cattle. The geographical distribution of the gastrointestinal nematodes is also reviewed in relation to the climatic conditions of the country. Various control options are discussed and how they are applicable to the Zimbabwean situation. Based on reports and existing data on the epidemiological features of the gastrointestinal nematode infection in cattle, practical control measures are critically reviewed and recommendations are made for a national control programme.

The toxic effect of various doses of aflatoxin B1 on renal function was studied. Experiments were conducted on randomly chosen Wistar rats. The animals were divided into four groups. Group I received 8% alcohol intragastrically. The other groups received aflatoxin B1 in various doses. The effect of the aflatoxin on renal cells was analysed by means of determination of oxidoreductive balance and development of free radicals. The activity of antioxidative enzymes in renal tissue has decreased with an increase in the dose of aflatoxin B1. Disturbance of oxidation balance in the kidneys confirm a toxic effect of aflatoxin B1 on these organs

The toxic effect of various doses of aflatoxin B1 on renal function was studied. Experiments were conducted on randomly chosen Wistar rats. The animals were divided into four groups. Group I received 8% alcohol intragastrically. The other groups received aflatoxin B1 in various doses. The effect of the aflatoxin on renal cells was analysed by means of determination of oxidoreductive balance and development of free radicals. The activity of antioxidative enzymes in renal tissue has decreased with an increase in the dose of aflatoxin B1. Disturbance of oxidation balance in the kidneys confirm a toxic effect of aflatoxin B1 on these organs

Electrocardiographic examinations were performed on 45 Silesian breed horses (group K, 3-16-year-old, 16 stallions, 29 mares) and on 25 Polish Primitive breed horses (group P, 1.5-19-year-old, two stallions, six geldings, 17 mares). Einthoven and chest leads were used. P-wave dispersion was electronically evaluated. There was no correlation between P-wave dispersion and other ECG parameters, age, sex, body mass, or month of pregnancy. The average value of P-wave dispersion for all horses was 30.77 ms (SD 3.92 ms), however in particular groups it was: in group P - 31.89 ms (SD 3.07 ms), and in group K - 30.15 ms (SD 4.27 ms). The maximum value of P-wave dispersion in the studied population was 40 ms, in groups P and K - 37,6 ms and 40 ms, respectively. The physiological value of P-wave dispersion for the group of horses was below 45 ms.

Electrocardiographic examinations were performed on 45 Silesian breed horses (group K, 3-16-year-old, 16 stallions, 29 mares) and on 25 Polish Primitive breed horses (group P, 1.5-19-year-old, two stallions, six geldings, 17 mares). Einthoven and chest leads were used. P-wave dispersion was electronically evaluated. There was no correlation between P-wave dispersion and other ECG parameters, age, sex, body mass, or month of pregnancy. The average value of P-wave dispersion for all horses was 30.77 ms (SD 3.92 ms), however in particular groups it was: in group P - 31.89 ms (SD 3.07 ms), and in group K - 30.15 ms (SD 4.27 ms). The maximum value of P-wave dispersion in the studied population was 40 ms, in groups P and K - 37,6 ms and 40 ms, respectively. The physiological value of P-wave dispersion for the group of horses was below 45 ms.

The study included 40 strains of Malassezia pachydermatis obtained in pure culture from external ear canal of dogs and the reference strain. Protein fractions were received by mechanical disruption of the fungal cells. Denaturing protein electrophoresis was performed according to Laemmli method. More than 90% of the all tested strains were characterised by the presence of the following protein fractions: 83.0; 77.0; 59.0; 55.0; 48.0; 38.0; 35.0; 28.0, and 27.0 kDa. In other regions of electrophoregrams, a relatively high differentiation was observed. The strains isolated from animals with otitis externa were characterised by the presence of the following protein fractions: 75.0; 61.0; 52.0; 36.0; 19.5; 16.0; 13.8, and 13.0 kDa. These fractions were absent in the commensal strains. The use of statistical analysis confirmed the obtained results and allowed to generate dendrogram grouping potentially pathogenic and commensal strains on two different branches. Such results may indicate significant differences between protein profiles of strains of M. pachydermatis isolated from healthy and diseased animals.

The study included 40 strains of Malassezia pachydermatis obtained in pure culture from external ear canal of dogs and the reference strain. Protein fractions were received by mechanical disruption of the fungal cells. Denaturing protein electrophoresis was performed according to Laemmli method. More than 90% of the all tested strains were characterised by the presence of the following protein fractions: 83.0; 77.0; 59.0; 55.0; 48.0; 38.0; 35.0; 28.0, and 27.0 kDa. In other regions of electrophoregrams, a relatively high differentiation was observed. The strains isolated from animals with otitis externa were characterised by the presence of the following protein fractions: 75.0; 61.0; 52.0; 36.0; 19.5; 16.0; 13.8, and 13.0 kDa. These fractions were absent in the commensal strains. The use of statistical analysis confirmed the obtained results and allowed to generate dendrogram grouping potentially pathogenic and commensal strains on two different branches. Such results may indicate significant differences between protein profiles of strains of M. pachydermatis isolated from healthy and diseased animals.

Changes in selected blood lymphocyte subpopulations in dogs administered with a soluble parasitic antigen (SPA) derived from a supernatant of 18S RNA-A and 18S RNA-B Babesia canis cell culture were investigated. The studies included 20 dogs divided into three groups: group I (n=8) - comprised of dogs receiving SPA twice, at 3 week intervals; group II (n=5) - nonvaccinated control dogs, and group III (n=7) - dogs vaccinated twice with a commercial B. canis vaccine. Cytometric analysis revealed that vaccination with SPA derived from B. canis culture had similar effects to the vaccination with a commercial vaccine. The vaccination lowered the percentage of T lymphocytes (CD3+), T helper cells (CD4+), cytotoxic/supressor T cells (CD8+), B lymphocytes (CD21+), and MHC II lymphocytes in the blood in comparison to non-vaccinated dogs. Statistical analysis of the results demonstrated that mean values of the tested parameters at each stage of the study were similar in groups I and III and significantly higher in group II. The lowered level of the lymphocyte subpopulations in groups I and III persisted during the whole period of the study. The results presented that SPA has immunosuppressive effect in the first period after being administrated.

Changes in selected blood lymphocyte subpopulations in dogs administered with a soluble parasitic antigen (SPA) derived from a supernatant of 18S RNA-A and 18S RNA-B Babesia canis cell culture were investigated. The studies included 20 dogs divided into three groups: group I (n=8) - comprised of dogs receiving SPA twice, at 3 week intervals; group II (n=5) - nonvaccinated control dogs, and group III (n=7) - dogs vaccinated twice with a commercial B. canis vaccine. Cytometric analysis revealed that vaccination with SPA derived from B. canis culture had similar effects to the vaccination with a commercial vaccine. The vaccination lowered the percentage of T lymphocytes (CD3+), T helper cells (CD4+), cytotoxic/supressor T cells (CD8+), B lymphocytes (CD21+), and MHC II lymphocytes in the blood in comparison to non-vaccinated dogs. Statistical analysis of the results demonstrated that mean values of the tested parameters at each stage of the study were similar in groups I and III and significantly higher in group II. The lowered level of the lymphocyte subpopulations in groups I and III persisted during the whole period of the study. The results presented that SPA has immunosuppressive effect in the first period after being administrated.

Sixteen white Wistar female rats were divided into two equal groups. Experimental group received per os 40 mg/kg b.w. of L-arginine, every other day for 2 weeks and were decapitated after 3 weeks of the experiment. Control rats received in the same manner 2 ml of distilled water and were decapitated after 3 weeks of the experiment. The renal lesions observed under electron microscope were of focal character and concerned only the experimental group. The tubules with necrotic cells were observed among normal tubules or single normal epithelial cells of the tubular wall. The boundaries between epithelial cells of the tubule wall were blurred. The mitochondria indicated abnormal structure. Numerous lysosomes and peroxysomes with dark, homogenous content were observed. The rough endoplasmic reticulum had widened channels and was focally completely destroyed. The nucleus of damaged cells was most commonly located in one of the cell poles; its shape was changed and visibly smaller than the nuclei of normal cells. Condensation and peripherally located chromatin were noticed. The lesions observed were characteristic for apoptotic cells.

Sixteen white Wistar female rats were divided into two equal groups. Experimental group received per os 40 mg/kg b.w. of L-arginine, every other day for 2 weeks and were decapitated after 3 weeks of the experiment. Control rats received in the same manner 2 ml of distilled water and were decapitated after 3 weeks of the experiment. The renal lesions observed under electron microscope were of focal character and concerned only the experimental group. The tubules with necrotic cells were observed among normal tubules or single normal epithelial cells of the tubular wall. The boundaries between epithelial cells of the tubule wall were blurred. The mitochondria indicated abnormal structure. Numerous lysosomes and peroxysomes with dark, homogenous content were observed. The rough endoplasmic reticulum had widened channels and was focally completely destroyed. The nucleus of damaged cells was most commonly located in one of the cell poles; its shape was changed and visibly smaller than the nuclei of normal cells. Condensation and peripherally located chromatin were noticed. The lesions observed were characteristic for apoptotic cells.

The study included a sheep flock comprising five genetic groups. The ELISA was applied to perform constant monitoring (every six months) for the infection of ewes with small ruminant lentivirus (SRLV). The research results demonstrated a negative effect of SRLVs infection on lamb rearing that, depending on the genetic group, proved to be lower 1.3%-1.4% compared to the seronegative mothers. At relatively equal fertility (94%-100%) and more differentiated prolificacy (179%-198%) in all the examined groups (except the Suffolk breed), a rearing index was higher in the seronegative animals 6.8%-24.1% compared to the seropositive mothers. The Suffolk breed proved to be the genetic group most susceptible to SRLV infection. A prolificacy of infected ewes was 10% lower, a lamb rearing rate was 13% lower , and a general reproductive performance was 18% lower in comparison to healthy ewes.

The study included a sheep flock comprising five genetic groups. The ELISA was applied to perform constant monitoring (every six months) for the infection of ewes with small ruminant lentivirus (SRLV). The research results demonstrated a negative effect of SRLVs infection on lamb rearing that, depending on the genetic group, proved to be lower 1.3%-1.4% compared to the seronegative mothers. At relatively equal fertility (94%-100%) and more differentiated prolificacy (179%-198%) in all the examined groups (except the Suffolk breed), a rearing index was higher in the seronegative animals 6.8%-24.1% compared to the seropositive mothers. The Suffolk breed proved to be the genetic group most susceptible to SRLV infection. A prolificacy of infected ewes was 10% lower, a lamb rearing rate was 13% lower , and a general reproductive performance was 18% lower in comparison to healthy ewes.

The study was conducted on 20 clinically healthy stallions, aged 3-4 years. The evaluation of the degree of adaptation of stallions to exercise loads in the course of a 100-d training programme was conducted three times: (I) - on the 1st d of training, (II) - on the 46th d of training, and (III) - on the 97th d of training. Rectal temperature (T) and number of heart and respiratory rates were measured. Blood was sampled before exercise (1), after exercise (2), and 30 min after rest (3). The following indices were determined in the blood: concentration of haemoglobin, haematocrit level, number of red blood cells, white blood cells, lymphocytes, neutrophils, eosinophils, basophils, monocytes, and platelets. Post-exertion changes in the evaluated indicators showed moderate intensity to the applied loads with respect to functional potential of tested horses. The effect of the standard 100-d training was to stimulate the body's adaptation to functional tasks, which was evidenced, among others, by lower variability of post-exertion T and the number of red blood cells. The highest T increase was found at the beginning of the programme (about 2.1%), whereas during the subsequent studies (II and III) it was significantly (P<0.05) lower (0.98% and 0.84%, respectively). The variability in red blood cell count in the course of training showed a downward trend (16.4%, 13.7%, and 11.0%, respectively). The results confirm the relatively low exercise loads and good health of young stallions during the 100-d performance test.

The study was conducted on 20 clinically healthy stallions, aged 3-4 years. The evaluation of the degree of adaptation of stallions to exercise loads in the course of a 100-d training programme was conducted three times: (I) - on the 1st d of training, (II) - on the 46th d of training, and (III) - on the 97th d of training. Rectal temperature (T) and number of heart and respiratory rates were measured. Blood was sampled before exercise (1), after exercise (2), and 30 min after rest (3). The following indices were determined in the blood: concentration of haemoglobin, haematocrit level, number of red blood cells, white blood cells, lymphocytes, neutrophils, eosinophils, basophils, monocytes, and platelets. Post-exertion changes in the evaluated indicators showed moderate intensity to the applied loads with respect to functional potential of tested horses. The effect of the standard 100-d training was to stimulate the body's adaptation to functional tasks, which was evidenced, among others, by lower variability of post-exertion T and the number of red blood cells. The highest T increase was found at the beginning of the programme (about 2.1%), whereas during the subsequent studies (II and III) it was significantly (P<0.05) lower (0.98% and 0.84%, respectively). The variability in red blood cell count in the course of training showed a downward trend (16.4%, 13.7%, and 11.0%, respectively). The results confirm the relatively low exercise loads and good health of young stallions during the 100-d performance test.

The aim of the study was to assess the influence of the oestrous cycle phase on neutrophil secretory activity and to extrapolate it to susceptibility to uterine infections. The obtained results indicate that the highest enzyme release seen in the late follicular phase (elastase release was 42.18 ±3.11% of maximal release, myeloperoxidase was 45.0 ±5.12%, and alkaline phosphatase was 44.75 ±9.0%) was related to the level of 17β-oestradiol in plasma. Similarly, a free radical generation was also the most enhanced during this phase. Significantly lower values were obtained from sows during the luteal phase in regard to both enzyme release (36.62 ±3.58% for elastase, 27.87 ±8.7% for myeloperoxidase, and 22.12 ±2.4% for alkaline phosphatase), and that of free radicals (2.28 1.6 μM/106 cells for nitric oxide and 2.47 0.6 nM/106 cells for superoxide).

The aim of the study was to assess the influence of the oestrous cycle phase on neutrophil secretory activity and to extrapolate it to susceptibility to uterine infections. The obtained results indicate that the highest enzyme release seen in the late follicular phase (elastase release was 42.18 ±3.11% of maximal release, myeloperoxidase was 45.0 ±5.12%, and alkaline phosphatase was 44.75 ±9.0%) was related to the level of 17β-oestradiol in plasma. Similarly, a free radical generation was also the most enhanced during this phase. Significantly lower values were obtained from sows during the luteal phase in regard to both enzyme release (36.62 ±3.58% for elastase, 27.87 ±8.7% for myeloperoxidase, and 22.12 ±2.4% for alkaline phosphatase), and that of free radicals (2.28 1.6 μM/106 cells for nitric oxide and 2.47 0.6 nM/106 cells for superoxide).