Browsing by Author "Berhanu Tilahun"

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    Camel Management and Status of Camel Brucellosis in Jijiga Zone South East Low land Areas Somali National Regional State Easern Ethiopia
    (Addis Ababa University Faculty Of Veterinary Medicine, 2006-06) Berhanu Tilahun; Merga Bekana
    A cross-sec tio nal Clwlcmio \ogicai study was carried out from October 2005 to March 2006 10 delL'11111l1C tht: S I.;roprc\a1cncc 0 r c ame\ b n1cc llosis in s Ollth cas! 10\\ I and a rcas 1 n JiJ iga lone, Soma li 1\a1l011 '-11 Regional State (SNRS). to characterize the management system. determine the scroprcva\cnce of camel brucellosIs and identify the risk faclOrs that contribute to the OCCU1Tcncc of bmccllosis. A simple ra ndom sampling method was used to seleci 822 camel and 185 he rds (households) 59~ camels 0.05). The he rd level seroprc\alence \\as 10.3°u (95 0 oCI= 6.7-15.7). Although the herd le\'eI seroprc\'alcnce was higher in JiJlga (12°/0 ) than III Bahik (5.811 ,,). the liJffercnc( \\as not stallstlcally sign ificant The herd !c\c[ seropre\akncc \\as slg1l1licantl~ lllCfeasJIlg \\ IIh the Illcrement of thc herd size (p
  • No Thumbnail Available
    Item
    Camel Management and Status of Camel Brucellosis in Jijiga Zone Southeast Lowland Areas, Somali National Regional State, Eastern Ethiopia
    (2006-06) Berhanu Tilahun; Merga Bekana
    A cross-sectional epidemiological study was carried out from October 2005 to March 2006 to determine the seroprevalence of camel brucellosis in south east low land areas in Jijiga zone, Somali National Regional State (SNRS), to characterize the management system, determine the seroprevalence of camel brucellosis and identify the risk factors that contribute to the occurrence of brucellosis. A simple random sampling method was used to select 822 camel and 185 herds (households). 594 camels and 133 herds were selected from Jijiga area while 228 camels and 52 herds were selected from Babile area. Serum samples were collected from all camels (822) 2 years old or above. The blood samples were screened by RBPT and all RBPT positive reactors were further tested by the CFT for confirmation. Additionally, a structured questionnaire format was prepared and administered to hundred of the 185 selected households to collect information about animal attributes and farm attributes. The results showed that significant proportions of the households kept camel together with cattle and shoats (40%) and only with cattle (32%). The camel herd was dominated by pregnant animals (21.8%), lactating animals (21.1%) and mature non-lactating animals (19.3%). The most important diseases affecting camels in the area as mentioned by the households were trypanosomosis (93%), anthrax (80%), pneumonia (70%), bent neck (59%), abscess (59%), endoparasites (54%) and ectoparasites (51%). Camel management practices like herding and watering, milking and delivery and mating assistance were mainly the responsibilities of adult and young males. In this study, the overall seroprevalence of brucella antibodies in camels was 2.43%( 95% CI=1.6-3.8). Among the potential risk factors considered (sex, age, herd size and parity), none of them had significant effect on individual animal seroprevalence (p>0.05). The herd level seroprevalence was 10.3% (95%CI= 6.7-15.7). Although the herd level seroprevalence was higher in Jijiga (12%) than in Babile (5.8%), the difference was not statistically significant. The herd level seroprevalence was significantly increasing with the increment of the herd size (p<0.01). It can concluded thus camel brucellosis had low prevalence in the areas and herd size was the important risk factor for the occurrence of the disease at herd level.
  • No Thumbnail Available
    Item
  • No Thumbnail Available
    Item
    Seroepidemiology of Toxoplasmosis in Domestic Ruminants, Public Health Significance andIisolation of Toxoplasma Gondii from Animal Tissues in Selected Districts of East Hararghe Zone of Oromia Region, Tthiopia
    (Addis Ababauniversity, 2015-10) Berhanu Tilahun ; Hailu Yacob
    Toxoplasmosis is a zoonotic disease caused by Toxoplasma gondii capable of infecting all warm-blooded animals including man. It is unevenly spread across the world at varied prevalences in different host species. In Ethiopia, as there was no nation-wide survey, the status of T. gondii infection in several areas remains unknown. Therefore, a cross-sectional sero-epidemiological study of T. gondii infection was conducted from July 2011 to September 2013 in three selected districts of East Hararghe Zone of Oromia Region, Ethiopia, in order to determine the seroprevalence and identify the risk factors of T. gondii infection in animals and humans as well as to isolate T. gondii from infected animal tissues. A structured questionnaire was administered to one hundred randomly selected individuals whose animals were included in the study to collect information on variables such as sex, age, herd/flock size, cats contact, presence of feral cats, and source of water, type of housing and geographical location in an attempt to identify the risk factors attributing to T. gondii infection in animals. Animals sera (n = 1360) were tested for the presence of anti-T. gondii antibodies by ELISA using the ID vet Screen Toxoplasmosis multi-species indirect kit (IDVET, Montpellier, France). Sera were collected from humans and a questionnaire was administered to collect data on potential risk factors. Toxoscreen DA and Toxo-ISAGA diagnostic kits were employed for the detection of Anti-T. gondii IgG and IgM antibodies in human sera, respectively. All factors attributing to T. gondii infection in human and animals were analyzed using chi-square test and logistic regression analysis. Accordingly, serologic evidence of T. gondii infection was detected in 32 (84.2%) out of 38 farm areas. The seroprevalence of T. gondii infection in sheep, goats, cattle and camels was 33.7%, 27.6%, 10.7% XV and 14.4% at animal level and 60.8%, 55.8%, 23.2%, and 53.2% at flock/herd level, respectively. On multivariable logistic regression analysis the risk factors significantly associated with T. gondii seropositivity were female gender [odds ratio (OR) 2.63, 95% confidence interval (CI) 1.18–5.88, P = 0.019], use of pond (OR: 4.25, 95% CI: 2.15–8.38, P < 0.001) and pipe water in sheep (OR: 9.57, 95% CI: 5.00–18.33, P < 0.001); adult age (OR: 3.45, 95% CI: 1.34–8.90, P = 0.010), use of pond (OR: 6.03, 95% CI: 2.42–15.05, P < 0.001) and pipe water (OR: 11.61, 95% CI: 4.35–30.95, P < 0.001) in goats; use of pond (OR: 5.60, 95% CI: 2.12–14.78, P < 0.001) and pipe water (OR: 10.68, 95% CI: 2.23–51.22, P = 0.003) in cattle; adult age (OR: 2.49, 95% CI: 1.14–5.42, P = 0.22) in camels. In human, the T. gondii IgG (n = 354) and IgM (n = 167) seroprevalences were 65.8% (95% CI: 60.62–70.75) and 8.9% (95% CI: 5.11–14.38) respectively. Gender difference in IgG seroprevalence was not statistically significant (P > 0.05), but 69.5% of adults exhibited an IgG seroresponse to T. gondii. Pregnant women showed 76.4% and 9.3% anti-T. gondii IgG and IgM antibodies, respectively. The risk factors identified significantly associated with T. gondii seropositivity in human on multivariable logistic regression analysis were district (OR = 2.24, 95% CI: 1.25–4.01, P = 0.007), pipe water source (OR = 6.70, 95% CI: 2.70–16.64, P < 0.001), adult age (OR = 4.32, 95% CI: 1.91–9.75, P < 0.001), and keeping cats in the home (OR = 2.01, 95% CI: 1.11–3.65, P = 0.021). Viable T. gondii tissue cysts were isolated by bioassay in mice from the hearts of 23 (67.6%) sheep and goats. In conclusion, the detection of T. gondii infection among domestic ruminants indicates the potential risk presented to humans from food animals. The IgM seropositivity detected among pregnant women warrants the potential risk of congenital transmission. The principal source for acquisition of T. gondii infection both in animals and humans was the water source. Thus, inlight of this the impact of T. gondii infection on the health, production and reproduction of domestic ruminants, the extent of congenital transmission and water contamination requires further future investigation.. Key words: DAT, District, East Harerge Zone, ELISA, Humans, ISAGA, Oromia, Risk factors, Ruminants, Seroprevalence, Toxoplasma gondii