A field study was carried out in a fish farm to study the effect of seasonal variations during the production period on performance and parasitic infestation of cultured fish. Water samples were obtained to determine the Physio-chemical investigation of water in the examined farm to estimate temperature, dissolved oxygen, PH, ammonia, nitrite, nitrate, salinity, total alkalinity and total hardness. Fish samples were obtained for parasitological examination to detect external parasitic infestation.The results referred that an elevation of water temperature during summer months leading to slight increase of PH of water, while dissolved oxygen values decreased from 6.8±0.15 to 6.0±1.5 throughout the study period. The mean values of ammonia, nitrite and nitrate reach the maximum in July and August months (0.71±0.18, 0.20±0.07 and 3.1±0.07 mg/l respectively). In addition there was a slightly increase of the total alkalinity and total hardness at beginning of the study (37.8±3.0 and 147.0±5.0mg/l respectively) reached the maximum levels in the summer months (44.4±2.8 and 182.8±6.0 mg/l respectively). It can be noticed that the most prevalent ectoparasitic affecting cultured Tilapia are Trichodina,Monogenia and Epistylis. It can be noticed that, the average initial body weight of examined fish was 6.8±2.3 gm and reached 218.0±3.8 gm. at the end of experiment (210 days) with an average of daily weight gain 1.01 ±0.07 gm. From the aforementioned results, it can be concluded that special attention to Physio-chemical parameters of water fish ponds and regular inspection of fish parasitic infestation particularly during summer months obtained a good fish performance as well as high body weight gain and high survival percentage.

In an attempt to evaluate the possible role of Eimeria stiedae infection on rabbit vaccinatedwith haemorrhagic septicaemia oil adjuvant vaccine, a total of 60 New-Zealand rabbits weredivided into 6 groups (A- F). The first four groups subdivided into two subgroups. The subgroups(A1, A2) vaccinated and infected at time of 1st dose of vaccine, subgroup (B1, B2) vaccinated andinfected at 2 weeks post 1st vaccination, subgroup (C1, C2) which vaccinated and infected at thetime of 2nd dose of vaccination, finally subgroup (D1, D2) vaccinated and infected at 2 weeks post2nd dose of vaccine. Group E vaccinated only but the group F left as non vaccinated non infected(control). The results revealed that E. stiedae infection at the time or after 2 weeks from first orsecond dose of vaccination (A1, B1, C1 and D1) and treated with semduramycine 150 showed slightdecrease of the antibody titer in contrast the untreated group (A2, B2, C2 and D2) showed suddendecrease of P. multocida antibody titer measured by indirect haemagglutination and ELISA test.Vaccinated group (E) was the superior one showing the highest antibody titer. The challenge test ofall rabbit groups with virulent P. multocida revealed a protective percent of 83.4%, 50%, 100%and 0 % in treated, untreated, vaccinated and control group respectively, but subgroups C2, D2the protective value was 33.4% this due to challenge concurrency post or at the time of infection.These findings reflect the important to avoid coccidial infection following vaccination programs toobtain better immune response to haemorrhagic septicaemia oil adjuvant pasteurellosis vaccineand high level of protection.

Evaluation of amitraz against ticks and mites infestation in cattle and sheep in comparison with diazinon and deltamethrin was performed. Amitraz showed over 95 % inhibition of oviposition and hatching of laid eggs at dilution of 1:500 while diazinon and deltamethrin produced around 90 % inhibition of oviposition at the same dilution. Fed ticks were more susceptible for all tested acaricides than the unfed ticks, where amitraz reached its full effectiveness (100 % kill of fed and unfed) 2 weeks after application while diazinon and deltamethrin produced over 90 % at the same dilution. Spraying application of amitraz 12.5 % resulted in 100 % tick control by day 5 and the effect was maintained for further 28 days whereas diazinon and deltamethrin were fully effective by days 9 and 13, respectively and their efficacy were maintained for 16 and 20 days, respectively. Spraying application of amitraz 12.5 % produced 100 % efficacy as no live mites were found on day 17 and maintained in full effectiveness till day 33 where respraying was needed. In conclusion, amitraz produced rapid detachment of ticks from animals; its residual effect was long and protected animals from re-infestation for 29 days and was able to eradicate psoroptes mite infestation in sheep.

Ticks infesting cattle represent a serious problem for improvement of cattle productivity in South Sudan. There has been limited information on ticks and tick-borne diseases in southern Sudan. This study was initiated to update the current distribution of ticks infesting cattle in the Central Equatoria region of South Sudan. The surveys for the present study were conducted at various cattle camps in Juba, Mangalla and Terekeka between December 2004 and June 2005. A total of 2322 ticks were collected from the bodies of 88 randomly selected cattle. Ticks were preserved in 70% ethanol for later identification. Seven ixodid tick species were found to infest cattle in Juba whilst six species were recorded in Mangalla and only four species in Terekeka. Amblyomma variegatum was the most common and widely distributed species found on cattle across all the study locations. Amblyomma lepidum was not found during this study. Based on these findings, it would be advisable to preempt the situation and institute containment procedures before possible East Coast fever outbreaks occur.

Different concentrations of artemisia extract were experimentally tested to treat Lernaea and Argulus infestations in common carp (Cyprinus carpio) fish with different methods. A total number of 210 carps (50 ± 10 g) were collected from private farms at Kafr El-Sheikh Governorate, Egypt, and divided into 7-groups in triplicate: G1 negative-control (apparently healthy carps), G2 positive-control (infested carps with Lernaea and Argulus), G3: infested carps treated with dipping in a NaCl solution (5g /L for 5 min. for 3 consecutive days), G4-G5: infested carps treated with dipping in a solution of artemisia extract with concentration 50% and 60% respectively, for 5 minutes, then fishes were accommodated at a recovery tank and inspected for 10 min., G6-G7: infested carps were placed in aquarium supplied with artemisia extract (3 mg/ L and 6mg/L respectively, for 15 consecutive days). The results revealed that artemisia extract had a noticeable positive effect on survival, recovery of infested carps and the parasitic elimination% which increased proportionally with increasing the concentration of the extract, whereas the best results were obtained at G5. Also, there were an improvement in serum biochemical parameters (increased total protein, albumin and globulin with reduced AST, ALT, creatinine and urea), which were proportionally improved with increasing both concentration and the duration of exposure to the extract, (especially at G7). Gross and histopathological examination and alterations of skin, gills, liver and intestine also revealed a noticeable improvement to the normal in the groups treated with artemisia extract in comparison with G2 especially G6 and G7. Consequently, application of artemisia extract is a safe and optimal method for treatment of Argulus and Lernaea parasitism in cultured carp.

In most countries, poultry are reared by traditional farmers d ue tothe relative minimum capital needed to start off, availability of feed and the fast period of the birds to grow. This research was conducted on turkeys which aims to study the abundance and prevalence of ectoparasites from three localities around Kedah, Malaysia. Atotal of 20 turkeys (eight males and twelve females) were examined for ectoparasites infestation and endoparasites infection.Six species of ectoparasites: five lice and a mite have been discovered. The most prevalent ectoparasite was Menopon gallinae with occurrence of 45%. Other external parasites recorded includeLipeurus caponis and Megninia cubitalis with occurrence of 40%, Menacanthus pallidulus (35%), Goniocotes gallinae (30%) and Chelopistes meleagridis (20%). There was a significant difference between the ectoparasite abundance in Jabatan Perkhidmatan Veterinar and Alor Belat Barat [ANOVA, F(2,17)=6.33, p=0.009]. These lice commonly found in the fluff of the feathers, especially at the neck,abdomen, and wings. Lipeurus caponis was found to have the highest infestation in all male and female turkeys and Menacanthus pallidulus was noted as the less common ectoparasite infesting both the male andfemale turkeys. Endoparasite infection was recorded in two species of parasite eggs of nematodes and protozoa. Oocyst of Eimeria spp. recorded the highest faecal egg count with 7300 epg compared to Capillaria spp. with only 1200 epg. Scavenging and pecking behaviour of turkeys in barn area with unsuitable farm housing environmentwere the major contributing factors to the infestation of ectoparasites as well as endoparasites infection.

A single dose of lufenuron was administered to dogs to test its efficacy in controlling cat flea (Ctenocephalides felis) infestations for at least 30 days. Efficacy measurements revealed marked differences in the reproduction capability of fleas collected from dogs in the treatment vs the control group. Essentially, aU of the eggs collected from dogs treated with lufenuron were unable to develop into normal adult fleas. Conversely, in the control group, 68.6% of the flea eggs developed into normal adult progeny.

A study was conducted on 240 scavenging chickens randomly obtained from various districts from the state of Penang, Peninsular Malaysia. The chickens were closely examined for visible ectoparasites in the laboratory. The ectoparasites were collected using a blunt forceps and stored in universal bottles containing 70% ethanol. Ten species of ectoparasites were noted which consisted of five species of lice, two species of mites, two species of ticks and one species of chigger. The lice identifi ed were Menopon gallinae, Menacanthus pallidulus, Lipeurus caponis, Goniocotes gallinae and Goniodes dissimilis. These lice occurred in the fl uff of the feathers of the body especially the neck, back, abdomen and wings. The mites were Megninia sp. and Pterolichus sp. Examinations of the ears and combs revealed Haemaphysalis sp., the hard tick. Meanwhile, Ornithonyssus sp., the soft tick was found on feathers, whereas chigger, Leptotrombidium sp. was found attached to the skins. The study also revealed that M. gallinae was the most common ectoparasite with 76.7% occurrence, followed by Pterolichus sp. (69.6%), L. caponis (63.3%), M. pallidulus (41.7%), Leptotrombidium sp. (17.5%), G. gallinae (9.5%), Haemaphysalis sp. (6.7%), Megninia sp. (3.8%) and Ornithonyssus sp. (3.8%). The least common ectoparasite was G. dissimilis occurring in 2.1% of the chickens.