The aim of this study was to examine the acute toxicity of organophosphorous insecticide (coumaphos) in wild pigeons (Rock dove) and measure the level of liver enzyme Alanine Transaminase (ALT)in the serum of pigeons treated orally with a single dose 3mg/kg bw. of coumaphos and study the histopathological changes of central and peripheral nervous system ,liver, kidney, heart and pancreas after 3 weeks of dosing .The results showed muscarinic, nicotinic and central nervous system effects and as well as showed a significant increasing (p≤0.‏05) in the level of ALT in the serum of treated pigeons in comparism with control group .The histopathological results included degeneration of nerve fibers in sciatic nerve,spinal cord and hepatocyte also preiportal and septal fibrosis and bile duct proliferation,the kidney showed degeneration of renal tubules and separation of renal capsule

Many clinical studies have reported that fish oil supplementation has beneficial effects supporting the idea that n-3 polyunsaturated fatty acids in fish oil are anti-inflammatory and immunomodulatory. Sixty one-day old broiler chicks were used in this study to determine the effect of fish oil on humoral immunity. They were divided into 3 equal groups (A, B &C) and raised under the same conditions until the end of the study at 49 day of age. The birds were vaccinated 3 times against Newcastle disease, at the 7th day they were vaccinated with Hitchner B1 and at 21st day and 35th day with LaSota type vaccine. Group A was fed fish oil supplemented diet for 14 days before the 3rd vaccination, whereas group B was fed after vaccination. Group C was served as control. Serum samples have been collected at 49th day from all groups. Antibody titer was detected by HI test; 2-mercaptoethanol-sensitive IgM and 2-mercaptoethanol-resistant IgG were also measured. Serum total protein, albumin and globulins were also estimated. Differential white blood cell count was performed to detect the number of heterophils and lymphocytes and their ratio. The results indicated that HI antibody titer was significantly ( p < 0.05 ) increased in both group A and B. Two-mercaptoethanol-sensitive IgM and 2-mercaptoethanol-resistant IgG were also showed significant ( p< 0.05 ) increase of IgG in both groups. The present study was also revealed a significant (p< 0.05) increase of serum globulins of group A and B in comparison to that of control group. Heterophils and lymphocytes percentage of both treated groups (A and B) significantly higher than that of untreated control group. These results showed that 50 gm/kg of diet fish oil accelerates antibody production and maintain proper immune function in chickens fed after vaccination against Newcastle disease with LaSota type vaccine at 35th day of age.

The prefect example for microorganisms which resist heavy metals is Pseudomonas aeruginosa, it has a good ability to resist and accumulate different metal ions, This article studied the resistance ability of P. aeruginosa against different concentrations of the following metals compounds : (HgCl,MgSo4,Zn2O3,MgCO3,Na2SO4,C10H20O,EDTA,NiSO4,CuCl2 and CdCl2), and describing the role of these metals to influence the production of bacterial pigments .

In this study ,the antibacterial activity of aqueous and purified pigment extracts of Ipomoea purpurea were tested against reference strains of Staphylococcus aureus and Esherichia coli . The preliminary qualitative tests showed that the two extracts have flavonoids, carbohydrates and glycosides ,While alkaloids found only in the aqueous extract ,Thin Layer Chromatography (TLC) showed the presence of anthocyanin pigment , both extracts gave a clear activity against the tested strains with a minimal Inhibitory Concentration reached to 25mg/ml

Cryptosporidium parvum is the most frequent parasitic agent that causes diarrhoea in AIDS patients in Thailand. Cryptosporidiosis outbreaks in humans may be attributed to contamination of their drinking water from infected dairy pastures. A 23-kDa glycoprotein of C. parvum (CpP23) is a sporozoite surface protein that is geographically conserved among C. parvum isolates. This glycoprotein is a potentially useful candidate antigen for the diagnosis of cryptosporidiosis by enzyme-linked immunosorbent assay. Therefore, we investigated the seroprevalence of C. parvum infection in dairy cows in northern Thailand using an ELISA based on recombinant CpP23 antigen. Sera were randomly collected from 642 dairy cows of 42 small-holder farmers, which had the top three highest number of the dairy cows' population in Northern Thailand, that included Chiang Mai, Chiang Rai and Lumpang provinces. The overall seroprevalence of the infection was 4.4 %, and the seropositive rates for the three provinces were 3.3 % in Chiang Mai, 5.1 % in Chiang Rai and 3 % in Lumpang. These results suggest that cattle could play a role in zoonotic cryptosporidiosis in Thailand.

Monthly total body tick collections from 13-20 camels were conducted for 2 consecutive years (2000-2001) in Northern Sudan. Tick populations were correlated with locality, season, predeliction site, sex and coat colour. Hyalomma dromedarii was found to be the predominant (89 %) tick species infesting the camels. Other tick species found in very low numbers were Hyalomma impeltatum (7.7 %), Hyalomma anatolicum anatolicum (3.3 %), Hyalomma truncatum (0.29 %), Hyalomma marginatum rufipes (0.25 %), Rhipicephalus praetextatus (0.30 %) and Rhipicephalus sanguineus group (0.09 %). Nymphs of the genus Hyalomma were collected in significant numbers. Adult ticks significantly preferred to attach to the lower parts of the camel's body for feeding while the nymphs preferred the back of the animal. Female camels harboured more ticks than males while higher infestations were recorded on camels with a grey coat colour compared to those with a brown coat colour. Ticks were found on camels throughout the year and increased in numbers during March to October with a peak in September.

During the mid 1990s a potentially serious, chronic syndrome was reported in well-managed beef and dairy herds from unrelated parts of South Africa. Farmers reported that it manifested as various combinations of decreased production, decreased weaning masses, apparent immune breakdown in previously immunocompetent animals, increased reproductive disorders, various mineral imbalances in non-deficient areas and goitre, noticeable as enlarged thyroid glands. The farmers associated this syndrome with certain batches of sugar cane molasses and molasses-based products. The syndrome was reminiscent of an "endocrine disruptive syndrome". The objective of this study was to evaluate the suspected endocrine disruptive effect of molasses included in cattle feed. Using existing in vitro assays, four batches of molasses syrup were screened for possible inclusion in a calf feeding trial. Two batches were selected for the trial. Thirty-two, 4- to 6-week-old, weaned Holstein bull calves were included in the single phase, three treatment, parallel design experiment. In two of the groups of calves, two different batches of molasses were included in their rations respectively. The control group was fed a ration to which no molasses was added, but which was balanced for energy and mineral content. The mass gain of the calves was recorded over the 6-month study period. The calves were clinically examined every week and clinical pathology parameters, immune responses and endocrine effects were regularly evaluated. Even though endocrine disrupting effects were detected with the in vitro screening assays, these could not be reproduced in the calves in the experiment. The two batches of molasses utilized in the calf feeding trial did not induce major differences in any of the parameters measured, with the exception of a lower mass gain in one of the molasses-fed groups (Group 1), which tended towards significance. The results of the study indicate that the two batches of molasses had no endocrine disruptive or immunosuppressive effects in calves.

The present study was performed in order to evaluate the effects of lower than usual industry levels of dietary trace minerals on plasma levels, faecal excretion, performance, mortality and morbidity in growing-finishing pigs in a hot African climate. Group 1 (n =100 pigs) received a diet with common industry levels of trace minerals. Group 2 (n =100 pigs) received reduced dietary trace mineral levels but were fed the same basic diet as Group 1. Mortality, morbidity, pig performance and carcass measurements were evaluated. Two pigs in Group 1 and three pigs in Group 2 died. Thirteen pigs in Group 1 and 27 pigs in Group 2 were medically treated (P < 0.05). Carcass masses, back fat depth, loin depth, and lean percent were not significantly different between the groups. However, the carcasses when evaluated revealed a non-significant higher back fat thickness, lower loin eye area and percentage of fat-free lean in barrows compared to gilts within each group. Despite lower initial masses, pigs fed diets containing industry levels of trace minerals were heavier (P < 0.05) and had a higher (P< 0.05) than average daily gains compared to those that received a diet containing lower levels of trace minerals. Faecal zinc excretion was significantly lower (P < 0.05) in pigs fed with lower dietary zinc levels. Copper, manganese and iron excretion were not affected (P &gt; 0.05) by the dietary levels of these trace minerals. Plasma trace mineral concentrations were not affected by the dietary treatment.