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The concentration of Rn daughters in outdoor air in Montreal was measured 222 times over a 1 yr period from April 1988 to March 1989. The values measured display a mean of 4.4 Bq m?3, a median of 2.6 Bq m?3, a mode of 2.2 Bq m?3 and a standard deviation of 4.4 Bq m?3. The concentrations show a pronounced seasonal variation. They are highest in summer and lowest in winter. It is believed that this behavior is due to the cold climate. The histogram of concentrations has a coefficient of skewness of 2.3 and a coefficient of kurtosis of 9.7. 相似文献
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Kennedy F. Chah Kehinde A. Majiagbe Haruna M. Kazeem Ogechukwu Ezeanyika Ifeoma C. Agbo 《Veterinary dermatology》2012,23(6):522-e104
Background – Dermatophytes are well‐recognized cutaneous fungi with public health implications. In Nigeria, several studies have been carried out on dermatophytosis in humans; however, data on dermatophytes in animals are lacking. Objectives – This study was conducted to determine the occurrence and species of dermatophytes in skin lesions in domestic animals in Nsukka Agricultural Zone of Enugu State, Nigeria. Animals – Forty‐six domestic animals (dogs, goats, sheep and pigs) presented for sale in the local markets in the study area and with suspected lesions of dermatophytosis were used for the study. Methods – Plucked hairs and epidermal scales from the skin lesions of affected animals were inoculated on Sabouraud dextrose agar slants containing 0.05 mg/mL of chloramphenicol and 0.5 mg/mL of cycloheximide. Inoculated slants were incubated at room temperature (27°C) for up to 4 weeks and examined at 2–3 day intervals for fungal growth. Laboratory identification of the fungal isolates was based on their colonial, microscopic and biochemical characteristics. Results – Of the 46 animals with suspected lesions of dermatophytosis, six (13.0%) were positive for a dermatophyte, and the following dermatophytes were identified: Microsporum gypseum, two of 12 sheep; Microsporum audouinii, one of 16 dogs; Trichophyton mentagrophytes, one of 16 dogs and one of 12 sheep; and Trichophyton schoenleinii, one of 13 goats. Conclusions and clinical importance – Anthropophilic dermatophytes are among the fungal agents associated with dermatophytosis in animals in Nsukka Agricultural Zone. These dermatophytes could constitute health risks to humans in contact with the animals. 相似文献
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Njoga Emmanuel Okechukwu Onunkwo Joseph I. Okoli Chinwe E. Ugwuoke Wilfred I. Nwanta John A. Chah Kennedy F. 《Tropical animal health and production》2018,50(4):897-902
Tropical Animal Health and Production - Imprudent administration of antimicrobial drugs in food-producing animals can facilitate the development and spread of antimicrobial-resistant organisms and... 相似文献
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The methanolic extract of Solanum torvum fruit showed a wide spectrum of antimicrobial activities against human and animal clinical isolates. 相似文献
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The study was carried out to determine the characteristics of snail farming in Edo South Agricultural Zone of Edo State Nigeria. The interview schedule was used to collect data from 60 snail farmers randomly selected from six cells in the study area. Information on the socioeconomic status of the farmers, production system, management practices and production constraints in the snail farms were elicited. The constraints were determined using a four-point Likert-type scale; a mean score of ≥2.5 was considered as a production constraint. Majority (85.0 %) of the respondents were part-time snail farmers. The major species of snails reared were Achatina achatina and Archachatina marginata, reared by 43.3 and 26.7 % of the farmers, respectively. Semi-intensive system of production was practised by 40.0 % of the farmers. Majority (78.0 %) of the respondents used car tyres to house their snails. About 56 % of the respondents kept their snails for 1–2 years before sale. Up to 51.7 % of the respondents separated their snails into different pens according to their size/age. The most commonly used feeds were vegetables (71.2 %), plant leaves (67.8 %) and kitchen waste (59.3 %). Records of snail production activities were kept by 75.0 % of respondents. The major constraints identified were lack of capital (3.31), inability to get good laying stock (3.00), lack of formulated feed to buy (2.98) and slow growth rate of snails (2.52). The potentials of snail farming in the study area have not been fully exploited as farmers produced at subsistence level. 相似文献
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Chinedu A. Akwuobu Roger D. Ayling Kennedy Foinkfu Chah Stephen I. Oboegbulem 《Tropical animal health and production》2014,46(6):1087-1092
The indicative prevalence of respiratory Mycoplasma species in small ruminants (SR) was determined in North-central Nigeria. Nasal swabs from 172 sheep and 336 goats from the Northeast, Northwest and South Senatorial Districts of Benue State were examined. Initial Mycoplasma isolation used Mycoplasma culture techniques followed by digitonin sensitivity testing. Species identification was done using polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE). Overall, Mycoplasma organisms were isolated from 131 (25.8 %) of the 508 SR examined. Prevalence rates of 18.1 and 29.8 % were recorded for sheep and goats, respectively. A total of 135 isolates of Mycoplasma belonging to three different species were identified: Mycoplasma ovipneumoniae (127), Mycoplasma arginini (7) and Mycoplasma mycoides subspecies capri (1). More than one Mycoplasma species were detected in four (3.1 %) of the 131 confirmed Mycoplasma positive cultures. Mycoplasma was isolated from 16.2 and 29.1 % of animals with and without respiratory signs, respectively. The high isolation rate of mycoplasmas in apparently healthy and clinically sick sheep and goats in this study indicates a carrier status in these SR which may constitute a serious problem in disease control. 相似文献
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J. M. Chah E. A. Onwubuya A. N. Asadu 《Journal Of Agricultural & Food Information》2013,14(3):233-247
This study examined the contribution of urban crop agriculture in Enugu metropolis, Enugu State. A questionnaire/interview schedule was used to collect information from 60 urban agriculture (UA) farmers. Respondents were engaged in UA to provide food for family members (97%), for extra income (91.67%), and to pay children's school fees (85.45%). The average amount realized from sales of UA produce was US$11 per week. The destruction of crops by stray animals, theft, and lack of information were identified as the major barriers to UA in the study area. Only 20% of the respondents were aware of extension services. Urban agriculture as practiced today in Enugu is of limited scale. To reach its full potential, government intervention is needed. 相似文献
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