Scholarly works in Veterinary Medicine

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A case report of Dystocia due to shistosomus reflexus (conjoined twins) in a West African Dwarf Doe in Ibadan, Nigeria
(Faculty of Veterinary Medicine, University of Ibadan., 2017) Olaogun, S. C.; Abiola J. O.; Jeremiah, O. T.
A three years old light brown West African dwarf doe, weighing about 32 kg was presented with history of dystocia of about 36 hours was presented to the University of Ibadan Veterinary Teaching Hospital, Ibadan. The animal was restless. Close observation showed a swollen vulva with protruding foetal head. There was abnormal slimy blood tinted discharges with foul odour in her vulva. Rectal temperature was 40 degree Celcius with relatively high respiratory rate. Dystocia was diagnosed. Using systematic and calculated tration and retropulsion, Schistosomus reflexus (co-joined twins) were subsequently delivered after about 20 minutes of intervention. Post-manipulation care was given by intramuscular injection of procaine penicillin and streptomycin combination at a dose of 1ml per 10kg body weight for 4 days consecutively; multivitamins injection was also given at 1ml per 10kg body weight for four days. Complete recovery of the doe was achieved.
A cryptic mitochondrial DNA link between North European and West African dogs
(Elsevier, 2017) Adeola, A. C.; Ommeh, S. C.; Song, J. J.; Olaogun, S. C.; Sanke, O. J.; Yin, T. T.; Wang, G. D.; Wu, S. F.; Zhou, Z. Y.; Lichoti, J. K.; Agwanda, B. R.
Domestic dogs have an ancient origin and a long history in Africa. Nevertheless, the timing and sources of their introduction into Africa remain enigmatic. Herein, we analyse variation in mitochondrial DNA (mtDNA) D-loop sequences from 345 Nigerian and 37 Kenyan village dogs plus 1530 published sequences of dogs from other parts of Africa, Europe and West Asia. All Kenyan dogs can be assigned to one of three haplogroups (matrilines; clades): A, B, and C, while Nigerian dogs can be assigned to one of four haplogroups A, B, C, and D. None of the African dogs exhibits a matrilineal contribution from the African wolf (Canis lupus lupaster). The genetic signal of a recent demographic expansion is detected in Nigerian dogs from West Africa. The analyses of mitochondrial genomes reveal a maternal genetic link between modern West African and North European dogs indicated by sub-haplogroup D1 (but not the entire haplogroup D) coalescing around 12,000 years ago. Incorporating molecular anthropological evidence, we propose that sub-haplogroup D1 in West African dogs could be traced back to the late-glacial dispersals, potentially associated with human hunter-gatherer migration from southwestern Europe.
A Retrospective Study of Ruminant Cases Presented Between 1996 and 2005 at the Veterinary Teaching Hospital, University Of Ibadan, Ibadan, Nigeria
(Integrity Research Journals, 2016) Abiola, O. J.; Olaogun, S. C.; Emedoh, O. M.; Jeremiah, O. T.
Retrospective study of ruminant cases (cattle, sheep and goats) presented to the Veterinary Teaching Hospital, University of Ibadan, Ibadan between a period of ten years (January1996 to December 2005) was conducted to determine the most prevalent diseases using clinical case file records. Within the period of study, a total of 601 cases were handled out of which 394 (65.56%) occurred in goats, 171(28.45 %) sheep and 36(5.99%) cattle. The most prevalent infections in the three species were ectoparasitism (31.11%), endoparasitism (16.97%) and reproductive cases (13.31%). Among caprine species, endoparasitism was 27.16%, while ectoparasitism and reproductive conditions had 20.96% and 13.96% respectively. As for ovine species endoparasitism was 38.01% while ectoparasitism 9.94% and reproductive conditions had 9.94. But among bovine species, endoparasitism was 41.67%, reproductive conditions had 22.22% and bacterial diseases had 16.67%. The high prevalence of these conditions may be due to poor management practices, improper health/veterinary care, stress on pregnant animals, and neglect of prophylactic measures for disease prevention. There is therefore need for awareness and education of livestock farmers/owners on effective prevention and control measures through livestock extension services and proper management system that restrict animals from roaming freely thereby preventing injuries caused by trauma.
Analysis of the genetic variation in mitochondrial DNA, Y-chromosome sequences, and MC1R sheds light on the ancestry of Nigerian indigenous pigs
(Springer Nature, 2017) Adeola, A. C.; Oluwole, O. O.; Oladele, B. M.; Olorungbounmi, T. O.; Boladuro, B.; Olaogun, S. C.; Nneji, L. M.; Sanke, O. J.; Dawuda, P. M.; Omitogun, O. G.; Frantz, L.
Background: The history of pig populations in Africa remains controversial due to insufficient evidence from archaeological and genetic data. Previously, a Western ancestry for West African pigs was reported based on loci that are involved in the determination of coat color. We investigated the genetic diversity of Nigerian indigenous pigs (NIP) by simultaneously analyzing variation in mitochondrial DNA (mtDNA), Y-chromosome sequence and the melanocortin receptor 1 (MC1R) gene. Results: Median-joining network analysis of mtDNA D-loop sequences from 201 NIP and previously characterized loci clustered NIP with populations from the West (Europe/North Africa) and East/Southeast Asia. Analysis of partial sequences of the Y-chromosome in 57 Nigerian boars clustered NIP into lineage HY1. Finally, analysis of MC1R in 90 NIP resulted in seven haplotypes, among which the European wild boar haplotype was carried by one individual and the European dominant black by most of the other individuals (93%). The five remaining unique haplotypes differed by a single synonymous substitution from European wild type, European dominant black and Asian dominant black haplotypes. Conclusions: Our results demonstrate a European and East/Southeast Asian ancestry for NIP. Analyses of MC1R provide further evidence. Additional genetic analyses and archaeological studies may provide further insights into the history of African pig breeds. Our findings provide a valuable resource for future studies on whole-genome analyses of African pigs.
Antimicrobial resistance among commensal Escherichia coli from cattle faeces and beef in Ibadan, Nigeria
(Academic Journals, 2012) Amosun, E. A.; Ojo, O. E.; Alao, I. K.; Ajuwape, A. T. P.
Commensal bacteria contribute to the distribution and persistence of antimicrobial resistance in the environment. This study monitored antimicrobial resistance in commensal Escherichia coli from the faeces of on-farm and slaughter cattle and beef. A total of 342 (89.5%) E. coli isolates were obtained from 382 samples. Isolation rate of E. coli was 90.0% in on-farm cattle, 87.1% in slaughter cattle and 92.2% in beef. Overall, the isolates showed resistance to amoxicillin (97.9%), ampicillin (97.9%), cefuroxime (25.1%), chloramphenicol (69.3%), ciprofloxacin (11.7%), cotrimazole (45.9%), erythromycin (59.4%), gentamycin (36.5%), nalidixic acid (27.2%), nitrofuratoin (54.9%), norfloxacin (21.1%), ofloxacin (14.0%), streptomycin (78.9%) and tetracycline (33.9%). There were no significant differences in antimicrobial resistance of E. coli from the different sample types. Only four (1.2%) of the 342 isolates were susceptible to all antimicrobial agents, while 338 (98.8%) were resistant to at least one of the tested antimicrobial agents. Multi-drug resistance to three or more antimicrobials was observed in 321 (93.9%) of all the isolates. Forty-one resistance groups were observed in on-farm cattle, 30 in slaughter cattle and 34 in beef. All the 30 resistance groups found in slaughter cattle were also present in on-farm cattle and beef. ‘AmoAmpChlEryNitStr’ and ‘AmoAmpChlStr’ were the predominant resistant patterns. This study confirmed on-farm and slaughter cattle as important sources of antimicrobial resistant E. coli transmissible to humans through beef.
Antimicrobial Resistance in Escherichia coli, Klebsiella pneumoniae and Pseudomonas aeruginosa Isolated from the Milk of Dairy Cows in Three Nigerian Cities
(Nigerian Veterinary Medical Association, 2012) Amosun, E. A.; Olatoye, O. I.; Adetosoye, A. I.
This study determined the safety of milk from dairy herds obtained by hand milking method from two major cattle producing States of Nigeria by investigating the presence of Escherichia coli 0157:H7 and their antibiotic susceptibility pattern. Forty seven milk samples from Kwara and 63 from Kaduna States were obtained from selected indigenous breeds of dairy cow. Bacteriological analysis by culturing on MacConkey agar (MAC) and subcultured on Sorbitol MacConkey agar (SMAC) were done. Escherichia coli 0157.H7 were confirmed serologically using latex agglutination kits (OxoidR UK). The isolates were tested for susceptibility to five commonly used antimicrobial agents and plasmid transfer was also carried out using E. coli K12 356 recipient. Out of the 61 non-Sorbitol fermenting (NSF) E. coli isolated from the samples 33(30.0%) were confirmed as E .coli 0157.H7 serotype. Antibiotic Susceptibility profile showed that all the isolates were resistant to one or multiple antibiotics, resulting in six different resistance patterns. Sulphadimidine resistance was the highest with all the isolates (100%) exhibited resistance to this drug while streptomycin had the highest sensitivity. Out of the seventeen E.coli 0157.H7 isolates tested for plasmid transfer, eleven (64.7%) transferred their resistance to the sensitive E. coli K12 356 enblock, while the remaining six showed segregation. The preponderance of E. coli O157 in this study indicated that greater proportion of milk being produced for human consumption in Nigeria were not wholesome and could posed threat of transmission of zoonotic pathogens. The high proportion of multidrug resistance exhibited by the isolates and the plasmid transfer is of public health significance as they could confer resistance on both pathogenic and non-pathogenic bacterial population in the consumers. More so, the milk which were obtained traditional unhygienic hand milking are either consumed raw or improperly pasteurized. Hygienic milking, pasteurization and judicious use of antibiotics after properly diagnosis and sensitivity test against newer antibiotics are recommended.
Antimicrobial Resistance in Escherichia coli, Klebsiella pneumoniae and Pseudomonas aeruginosa Isolated from the Milk of Dairy Cows in Three Nigerian Cities
(Nigerian Veterinary Medical Association, 2012) Amosun, E. A.; Olatoye, O. I.; Adetosoye, A. I
Bovine mastitis is usually associated with bacterial pathogens isolated from the milk or mammary glands of dairy cows. A total of 205 isolates comprising of 110 (53.66%) Escherichia coli, 67 (32.68%) Klebsiella pneumoniae, and 28 (13.66%) Pseudomonas aeruginosa obtained from cases of bovine mastitis from southwest and Northern Nigeria during a period of one year were tested for susceptibility to ampicillin, tetracycline, neomycin, streptomycin, sulphadimidine and nalidixic acid using minimum inhibitory concentration (MIC) method. The results demonstrated wide variation of in the susceptibility patterns for the various organisms from different regions of Nigeria. The three organisms displayed highest resistance to sulphadimidine 200 (97.5%) followed by ampicillin 153 (74.63%), tetracycline 103 (50.24%), neomycin 90 (43.90%), streptomycin 68 (33.17%) and nalidixic acid 29 (14.15%) respectively. The resistance patterns of the strains revealed 27 distinct resistance groups. In conclusion these data confirmed that majority of the Gram negative organisms that are causative agents of mastitis in Nigeria were resistant to several antibiotics. This could be a result of indiscriminate use of drugs by dairy farmers for treatment of mastitis in their herds.
Antimicrobial resistance pattern of Streptococci and Staphylococci isolated from cases of bovine clinical mastitis in Nigeria
(Marsland Press, USA, 2012) Amosun, E. A.
Streptococci and staphylococci are frequently isolated from bovine mastitis in dairy cows. Limited information is available on the antimicrobial susceptibility of these organisms in Nigeria. A total of 130 Streptococci and 177 Staphylococci isolated from cases of bovine mastitis from three states in Nigeria namely; Oyo, Kwara and Kaduna states for a period of one year were used in this study. Overall, 55.38% of the strains tested were Streptococcus uberis, 24.62% were Streptococcus agalactiae, 12.31% were Streptococcus dysgalactiae, 3.85% were Streptococcus zooepidemicus, 2.31% were Streptococcus bovis and 1.54% were for Streptococcus equines, 25 coagulase negative staphylococcus and 152 Staphylococci aureus. The antimicrobial susceptibility for these organisms was determined for the following antimicrobial agents: Ampicillin, Tetracycline, Sulphadimidine, Nalidixic acid, Neomycin and Streptomycin. Results demonstrated substantial differences in their resistance patterns for the various organisms. The resistance patterns revealed 10 distinct resistance groups. All the streptococci isolate showed resistance to Ampicillin and tetracycline while 98.46%, 86.15%, 48.46%, 24.62%, and of the Streptoccoci species were resistance to sulphadimidine, Neomycin, Streptomycin and Nalidixic acid respectively while Staphyloccocus aureus had 100% for tetracyclin and sulphadimidine respectively while 97.37%, 88.16%, 69.08% and 67.11% showed resistance to ampicillin, neomycin, nalidixic acid and streptomycin respectively. However, Staphylococcus coagulase negative showed 100% resistance to tetracycline and sulphadimidine while 72%, 68%, 68%, and 32% showed resistance to nalidixic acid, neomycin, ampicillin and streptomycin respectively. The result of this study revealed that dairy farmers misused these antibiotics by treating cows several times per case. This study point to the fact that dairy farmers should take caution in the use of antibiotics for the dairy cows on the farms
Bacteriological investigation of bovine clinical mastitis in two selected farms in Ibadan, Oyo State of Nigeria
(College of Veterinary Medicine, University of the Philippines, 2005) Amosun, E. A.; Ajuwape, A. T. P.; Adetosoye, A. I.
Bacteriological examination was performed on 60 and 40 milk samples of clinical mastitic udders from Akinyele and Iyana Offa farms, Ibadan, respectively. A total of 251 bacterial isolates belonging to 5 bacteriological genera were recovered from the milk of the mastitic cows examined. Approximately 70% and 76% of the Staphylococci isolated from the milk of mastitic cows in Akinyele and Iyana Offa farms, respectively, were coagulase positive. Staphylococcus aureus was the most common pathogen in this study with an incidence of 39.0% while the coagulase-negative Staphylococcus species had an incidence of 3.6%. Other bacteria isolated include Streptococcus agalactiae and Pseudomonas aeruginosa, each with an incidence of 7.6%, while Streptococcus uberis showed an incidence of 18.7% . Escherichia coli and Klebsiella pneumoniae showed an incidence of 11.2% and 12.4%, respectively. The bacteria encountered in this investigation are among the pathogens that have been incriminated as contaminants of fresh milk meant for human consumption and are therefore of public health importance.
Biochemical and serological characterization of Mycoplasma from bovine clinical mastitis in southwest and northern Nigeria
(Mycoplasma bovis, Mycoplasma mycoides subsp. mycoides, Mycoplasma capricolum, Mycoplasma arginini, Staphylococcus aureus, Streptococcus species, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, 2010) Amosun, E. A.; Ajuwape, A. T. P.; Adetosoye, A. I.
The primary objective of this study was to isolate and characterize the mycoplasma species present in clinical cases of mastitic cows in Southwest and Northern Nigeria and to determine the prevalence of mycoplasma mastitis in dairy cows. Two hundred milk samples were collected from cases of clinical mastitic cows in Ibadan,Ilorin and Kaduna. Mycoplasma was isolated from thirty-two milk samples, these milk samples were analysed bacteriologically and mycoplasmologically. The recovered pathogens were characterized biochemically using various tests. The mycoplasma species were also serologically identified by growth inhibition tests (GIT) using antisera produced in Rabbit against the mycoplasma strains. The Mycoplasma species identified from this include: 13 isolates of Mycoplasma bovis; 8 isolates of Mycoplasma mycoides sub sp. mycoides; 7 isolates of Mycoplasma capricolum and 4 isolates of Mycoplasma arginini. Other pathogens isolated include: Streptococcus species, Staphylococcus aureus, coagulase negative Staphylococcus, Escherichia coli, Klebsiella pneumoniae and Pseudomonsa aeruginosa. Based on the public health and economic significance of mycoplasma spp identified in this study, couple with the fact that consumption of such unpasteurized milk is a frequent occurrence among the rural dwellers which could result in milk borne zoonoses, it is suggested that fresh milk should be properly pasteurized before consumption by humans. Key words : Bovine; Mastitis; Biochemical;Serological;Mycoplasma; Nigeria.
Biochemical characterization of staphylococci isolated from rabbits
(Israel Veterinary Medical Association, 2002) Ajuwape, A. T. P.; Aregbesola, E. A.; Ademola, E. B
Coagulase activities of rabbit strains of staphylococci were tested using sterile human, rabbit and goat plasmas. Human plasma produced the most satisfactory coagulase sensitivity while the rabbit plasma was least sensitive. Human plasma tube coagulase gave a positive reaction within one hour, whereas rabbit and goat tube coagulase tests took two hours to complete. All 108 isolates of Staphylococcus aureus from clinically healthy rabbits fermented glucose, mannitol, sucrose, dulcitol and sorbitol, 98.1% fermented maltose and trehalose; 89.8% fermented lactose while only 46.3% fermented xylose. Urease activity was also high among the rabbit strains of staphylococci investigated.
Bovine Helminthosis: Blood Glucose Levels and Age Influence on Susceptibility in Some Nigerian Breeds of Cattle
(Science Domain, 2015) Olaogun, S. C.; Lasisi, O. T.
The effect of natural bovine helminthosis on blood glucose levels and the influence of age on its susceptibility were studied in four breeds of cattle in Ibadan Nigeria, using abattoir samples. One hundred and twenty cattle (28 males and 92 females) comprising Sokoto Gudali (51),White Fulani (30), Red Bororo (24) and Kuri (15) breeds of cattle which were all above 2.5 years old were used for this study. The blood glucose levels of all the cattle were determined by spectrophotometric method using Randox kitR (Randox LaboratoriesLimited, United Kingdom) while the corresponding fecal samples were examined for the helminth burden using the modified McMaster technique. The age of each cattle was estimated using a standard dentitition technique. The data obtained were subjected to Analysis of Variance (ANOVA) and Correlation analysis. Significance was determined at p< 0.05. Sokoto Gudali breed was the least susceptible (21.56%) to natural helminthosis while Kuri breed was the most susceptible (26.67%). Cattle in age range of 2.5-3years were the most susceptible to natural helminthosis across all the breeds, while cattle older than 3 years were less susceptible. Blood glucose had positive correlation with age (r = 0.24) and negative correlation with helminth burden (r = -0.14). Hypoglycemia was prominent in all the cattle with heavy helminth burdens. Female cattle showed a significantly higher susceptibility to natural helminthosis than males. This study identifies natural helminthosis as a predisposing factor to hypoglycemia in Nigerian breeds of cattle which is observed to be more severe in younger cattle.
Bovine streptococcal mastitis in Southwest and Northern States of Nigeria.
(Biomedical Communications Group, Ibadan, Nigeria, 2010) Amosun, E. A.; Ajuwape, A. T. P.; Adetosoye, A. I.
An investigation was carried out to identify the streptococci species isolated from clinical cases of bovine mastitis in Kwara, Kaduna and Oyo States of Nigeria. Milk samples from 200 clinically mastitic udders were bacteriological studied. A total of 130 streptococci isolate belonging to six species of streptococci, namely S. uberis, S. agalactiae, S. dysgalactiae, S. epidemicus, S. bovis, S. equinus were recovered from the milk examined. Streptococcus uberis was the most frequently encountered species with an incidence of (55.4%) followed by Streptococcus agalactiae (24.6%), Streptococcus dysgalactiae (12.3%) Streptococcus zoopidemicus (3.9%) Streptococcus bovis (2.3%) and Streptococcus equinus (1.5%). These species of streptococcus are of great public importance.
Calf Diarrhea: Epidemiological Prevalence and Bacterial Load in Oyo and Ogun States, Nigeria
(Alexandria Journal of Veterinary Sciences, 2016) Olaogun, S. C.; Jeremiah, O. T.; Jubril, A. J.; Adewuyi, O. O.
Diarrhea in calves is one of the most important causes of calf morbidity, mortality and economic losses. The prevalence of diarrhea in calves was studied in 12 farms in Oyo and Ogun states in South Western Nigeria. A total of 825 calves up to 6-months old were sampled over a period of 12 months with 120 (14.5%) of the calves showing signs of diarrhea. Faecal samples of diarrheic calves (n=120) were collected, and screened for bacterial pathogens using standard laboratory procedures. In Oyo and Ogun States, highest prevalence rates of calves with diarrhea were noticed in two farms of Oyo State 50% (25 out of 50 calves) and Ogun State 23% (12 out of 52 calves) were recorded respectively. Only 19 (15.8%) of the 120 calves had bacterial pathogens; Of the calves (n=19) where bacteria were isolated Escherichia coli was isolated from 12 calves (63.2%), Salmonella species was isolated from 10 calves (52.6%) and Campylobacter species was isolated from 1 calf (5.3%). The lowest levels of bacterial detection were seen in diarrheic samples from White Fulani calves (8.9%) with the highest levels seen in samples from Jersey calves (50%). Calves of 0-2 months had positivity bacterial cause of diarrhea of 18.4%, calves between 3 and 4 months had positivity of 8.8% and calves of 5-6 months had positivity of 20%. Bull calves had 17.0% positivity while heifers had 14.8% positivity among diarrheic calves. Calves having severe diarrhea had highest percentage positivity (26.1%) of bacterial isolates while calves with moderate diarrhea had the least percentage positivity (13.6%). Calves reared in semi-intensive system of management were the most susceptible (18.0%) while those reared under extensive system were least susceptible (13.6%) to bacterial scours. Therefore, Escherichia coli, Salmonella and Campylobacter organisms were most prevalent in calf scours. Age, breeds, sex, severity of diarrhea and system of management are predisposing factors of calf diarrhea.
Escherichia coli from Nigeria exhibit a high prevalence of antibiotic resistance where reliance on antibiotics in poultry production is a potential contributing factor
(Academic Journals, 2013) Nsofor, C. A.; Olatoye, I. O.; Amosun, E. A.; Iroegbu, C. U.; Davis, M. A.; Orfe, L. H.; Cali, D. R.
To assess thè prevalence of antibiotic resistance in Nigeria, single Escherichia coli isolates were collected from a geographically diverse panel of fecal samples collected from human clinical and non- clinical donors (n=77), livestock (cattle, swine, and goats) and chickens (n=71 total). There was no difference in thè proportion of isolates resistant to >1 antibiotics from human clinical and non-clinical samples, but overall, this was significantly higher for human (85.7%) compared to animai (53.5%) isolates (P<0.0001). The average number of resistance phenotypes per isolate was significantly higher for human (5.0), goat (4.0), and poultry (3.4) compared with cattle (2.4) and swine (2.0) (P<0.05). There were 25 different resistance phenotypes with more diversity from animai compared with human isolates. A survey of management practices at 30 poultry farms in thè vicinity of Ibadan found that all respondents self-milled feed and most (87.7%) routinely added antibiotics to feed. Tetracyclines were thè dominant antibiotics of choice followed by tylosin and gentamicin and some use of chloramphenicol, ciprofloxacin, and enrofloxacin. If this pattern of antibiotic resistance and use is repeated across thè different sectors of food-animal production and in multiple developing countries, then trade and travel are likely to disseminate resistance traits to other countries potentially negating locai policies that are designed to limit selection for antibiotic resistant bacteria
In-vitro dissolution and some physical properties of two generics of levamisole blous formulations for large animals.
(Indo American Journal of Pharmaceutical Research (IAJPR) Publications, 2017) Gberindyer, A. F.; Omotosho, O. O.; Olaogun, S. C.
Physical and dissolution properties of solid oral dosage formulations significantly affect therapeutic outcomes following their use in veterinary medicine. Therapeutic failure of most levamisole boluses for the prevention and treatment of helminth infections have been a recurrent complaint from animal health workers and veterinarians in Nigeria. However, there is dearth of information on the quality of oral bolus formulations of levamisole for veterinary use in Nigeria. Consequently, the purpose of this study was to evaluate physical and dissolution properties of two generic products of levamisole boluses commonly used in large animal practice in Nigeria. Two frequently used generics of levamisole oral boluses for large animal practice (A & B) were evaluated for bolus weight uniformity, hardness, friability, disintegration and dissolution as specified in the United States Pharmacopoeia. The results demonstrated that generic B failed weight uniformity and friability tests, whereas generic A failed friability and disintegration tests. All the products passed dissolution profile test as specified. Consequently, the two products can be used interchangeably, however, generic B is recommended for treating acute enteric helminthosis because of its fast disintegration and dissolution rates as compared to generic A.
Isolation and antibiotics susceptibility patterns of Escherichia Coli O157:H7 from selected dairy herds in Nigeria
(African Union, InterAfrican Bureau for Animal Resources (AU-IBAR), 2012) Amosun, E. A.; Olatoye, I. O.; Adetosoye, I. A.
This study determined the safety of milk from dairy herds obtained by hand milking method from two major cattle producing States of Nigeria by investigating the presence of Escherichia coli 0157:H7 and their antibiotic susceptibility pattern. Forty seven milk samples from Kwara and 63 from Kaduna States were obtained from selected indigenous breeds of dairy cow. Bacteriological analysis by culturing on MacConkey agar (MAC) and subcultured on Sorbitol MacConkey agar (SMAC) were done. Escherichia coli 0157.H7 were confirmed serologically using latex agglutination kits (OxoidR UK). The isolates were tested for susceptibility to five commonly used antimicrobial agents and plasmid transfer was also carried out using E. coli K12 356 recipient. Out of the 61 non-Sorbitol fermenting (NSF) E. coli isolated from the samples 33(30.0%) were confirmed as E .coli 0157.H7 serotype. Antibiotic Susceptibility profile showed that all the isolates were resistant to one or multiple antibiotics, resulting in six different resistance patterns. Sulphadimidine resistance was the highest with all the isolates (100%) exhibited resistance to this drug while streptomycin had the highest sensitivity. Out of the seventeen E.coli 0157.H7 isolates tested for plasmid transfer, eleven (64.7%) transferred their resistance to the sensitive E. coli K12 356 enblock, while the remaining six showed segregation. The preponderance of E. coli O157 in this study indicated that greater proportion of milk being produced for human consumption in Nigeria were not wholesome and could posed threat of transmission of zoonotic pathogens. The high proportion of multidrug resistance exhibited by the isolates and the plasmid transfer is of public health significance as they could confer resistance on both pathogenic and non-pathogenic bacterial population in the consumers. More so, the milk which were obtained traditional unhygienic hand milking are either consumed raw or improperly pasteurized. Hygienic milking, pasteurization and judicious use of antibiotics after properly diagnosis and sensitivity test against newer antibiotics are recommended.
Livestock waste management practices in Oyo state, Nigeria
(Sciendo (De Gruyter Poland), 2016) Abiola J. O.; Olaogun S. C.
Livestock waste management methods were evaluated in Oyo State where different farms were visited, structured pre-tested and peer-reviewed questionnaires were administered. The results of this study revealed that the use of animal wastes as manure for farmlands or outright dumping in the bushes, garbage sites or open lands were the most common waste disposal methods practiced by commercial poultry and livestock keepers in Oyo State. Out of all the farms sampled, 45% of the farms practiced Open lands waste disposal methods, 10% practiced sun-dried and burned animal wastes disposal methods, 14% practiced flushing wastes into nearby streams and rivers as slurry, 24% used a combination of all the three methods as space or time permits, 2% turn their waste to biogas for cooking or lightening on the farm and 5% use part of the waste as feed source for ruminants or fishes on the farm. The results showed that larger percentage of the farms does not have an environmental friendly animal waste management system and the implication is widespread air, water and land pollution
Multidrug resistant verocytotoxin-producing Escherichia coli O157:H7 in the faeces of diarrhoeic and non-diarrhoeic dogs in Abeokuta, Nigeria
(Faculty of Veterinary Medicine, University of Zagreb, 2014) Ojo, O. E.; Bello, A. O.; Amosun, E. A.; Ajadi, R. A.
Verocytotoxin-producing Escherichia coli (VTEC) 0157:H7 is a predominant cause of haemorrhagic colitis (HC) and haemolytic uraemic syndrome (HUS) in humans. To assess thè role of dogs as a possible source oftransmission ofVTEC 0157:H7 to humans, thè faeces of diarrhoeic (31) and non-diarrhoeic (63) dogs were examined for thè presence of thè organista. Escherichia coli 0157:H7 was isolated from 22 (23.4%) out of 94 samples examined. The organism was detected in 5 (16.1%) out of 31 diarrhoeic faeces and 17 (26.9%) out of 63 non-diarrhoeic faeces, but thè difference was not statistically significant (P>0.05). All thè E. coli 0157:H7 isolates produced one or both of verocytotoxin 1 and 2 (VT1 and VT2). Verocytotoxin 1 (VT1) was detected in 10 (45.5%) out of 22 isolates, VT2 in 8 (36.4%), while both toxin types were detected in four (18.2%) isolates. Sixteen (72.7%) out of 22 isolates were resistant to at least three antimicrobials from different classes, while 18 distinct antimicrobial resistance pattems were observed among thè isolates. The isolates showed resistance to ampicillin (86.4%), chloramphenicol (36.4%), ciprofloxacin (4.5%), gentamicin (18.2%), kanamycin (68.2%), nalidixic acid (22.7%), neomycin (40.9%), norfloxacin (9.1%), streptomycin (63.6%), sulphamethoxazole/ trimethoprim (63.6%) and tetracycline (77.3%). The present study showed that diarrhoeic and non-diarrhoeic dogs may serve as potential sources of multi-drug resistant VTEC 0157 :H7 transmissible to humans.
Multidrug resistant verocytotoxin-producing Escherichia coli O157:H7 in the faeces of diarrhoeic and non-diarrhoeic dogs in Abeokuta, Nigeria
(Faculty of Veterinary Medicine, University of Zagreb, 2014) Amosun, E. A; Olatoye, I. O.
Verocytotoxin-producing Escherichia coli (VTEC) 0157:H7 is a predominant cause of haemorrhagic colitis (HC) and haemolytic uraemic syndrome (HUS) in humans. To assess thè role of dogs as a possible source oftransmission ofVTEC 0157:H7 to humans, thè faeces of diarrhoeic (31) and non-diarrhoeic (63) dogs were examined for thè presence of thè organista. Escherichia coli 0157:H7 was isolated from 22 (23.4%) out of 94 samples examined. The organism was detected in 5 (16.1%) out of 31 diarrhoeic faeces and 17 (26.9%) out of 63 non-diarrhoeic faeces, but thè difference was not statistically significant (P>0.05). All thè E. coli 0157:H7 isolates produced one or both of verocytotoxin 1 and 2 (VT1 and VT2). Verocytotoxin 1 (VT1) was detected in 10 (45.5%) out of 22 isolates, VT2 in 8 (36.4%), while both toxin types were detected in four (18.2%) isolates. Sixteen (72.7%) out of 22 isolates were resistant to at least three antimicrobials from different classes, while 18 distinct antimicrobial resistance pattems were observed among thè isolates. The isolates showed resistance to ampicillin (86.4%), chloramphenicol (36.4%), ciprofloxacin (4.5%), gentamicin (18.2%), kanamycin (68.2%), nalidixic acid (22.7%), neomycin (40.9%), norfloxacin (9.1%), streptomycin (63.6%), sulphamethoxazole/ trimethoprim (63.6%) and tetracycline (77.3%). The present study showed that diarrhoeic and non-diarrhoeic dogs may serve as potential sources of multi-drug resistant VTEC 0157 :H7 transmissible to humans.