The present study aims to evaluate the morphometric parameters and level of Salmonella and Escherichia coli contamination of Tilapia guineensis and Sarotherodon melanotheron in the waterway of Southern Benin. 183 T. guineensis and 195 S. melanotheron were collected from June to July 2014 in four waterways: Lake Aheme, Nokoue Lake, coastal lagoon, and lagoon of Porto-Novo. Weight, total length, and standard length of these fish were evaluated. E. coli and Salmonella spp. were sought in fresh fish. The results obtained in this study indicate that S. melanotheron presented high-performance of length and weight more than T. guineensis in Aheme Lake and lagoon of Porto-Novo. However, in Nokoue Lake and coastal lagoon, no difference was observed between the two species of fish. As for bacteriological analysis, the population of T. guineensis was more contaminated with E. coli with respective values of 60% and 59.52% in the Nokoue Lake and coastal lagoon than in the two other streams. Regarding the population of S. melanotheron, she was most contaminated in the coastal lagoon with a percentage of 66.66% in Aheme Lake, Nokoue Lake, and the lagoon of Porto-Novo. However, no Salmonella germ was detected in fish analyzed in this study. It appears that the morphometric parameters and weight of T. guineensis are lower than those of S. melanotheron. The evaluation of the microbiological quality revealed that T. guineensis is more contaminated with E. coli that S. melanotheron. Keywords: Benin, Escherichia coli, morphometric parameters, Salmonella spp., Sarotherodon melanotheron, Tilapia guineensis.

Salmonellosis is one of the most common and widely distributed foodborne illnesses in human, and multidrugresistance of Salmonella spp. has increased in developing countries with the indiscriminate use of antibiotics in the poultry production system. A cross-sectional study was conducted on randomly selected retail markets of Chittagong City Corporation to determine the prevalence and antimicrobial resistance pattern of Salmonella isolated from commercial layer eggs, eggshell surface, and egg-storing trays. Chicken eggs, egg surface, and egg-storing trays samples from the retail markets were collected for isolating Salmonella spp. (bacteriological culture methods) followed by antimicrobial susceptibility testing (disc diffusion method) against Salmonella isolates during the period from July to December 2013. Out of the 310 layer eggs, egg surface, and egg-storing trays samples, the highest prevalence of Salmonella spp. was found in eggs trays (57.15%) and the lowest (13.33%) in eggs and the prevalence differed significantly (p<0.01). On the other hand, the prevalence was higher (45%) in samples of Pahartali bazar and lower (31.43%) in samples of Bohderhat bazar but the variation among the sites was not varied significantly (p>0.05). Isolated Salmonella was tested for resistance to eight different antimicrobial agents, using disc diffusion method. Among eight antimicrobial tested (n=111), 100% resistance were found to ampicillin and amoxicillin followed by erythromycin (60-100%), tetracycline (72-93%), ciprofloxacin (22-66%), colistin (27-66%), enrofloxacin (42-54%), and pefloxacin 23.07% across the study sites. Ciprofloxacin remained sensitive in 40.9% cases and, pefloxacin and colistin appeared to be almost sensitive (61-72%) against Salmonella isolates at studied areas. Salmonella isolates showed multidrug-resistance pattern up to five of the eight antimicrobials tested. It can be said that the rational use of antibiotics needs to be adopted in commercial poultry farming system of Bangladesh to prevent the emergence of drug-resistance Salmonella to protect the public health consequences. Keywords: antimicrobial, public health, prevalence, resistance, Salmonella

We aimed to compare Salmonella isolates from different sources using molecular and phenotypic methods, targeting better possibility of understanding the epidemiology of this organism in the Greek context with emphasis in municipal wastewater. In this study, we used pulsed field gel electrophoresis (PFGE) in combination with antimicrobial susceptibility testing to analyze a total of 88 Salmonella Enterica isolates from municipal sewage (n=25), humans (n=36), animals (n=24), and foods (n=3) in Greece. The higher resistance rates were found to the following antimicrobials: streptomycin (59.1%), tetracycline (47.7%), nalidixic acid (46.6%), ampicillin (37.5%), and oxolinic acid (35.2%). Resistance to ciprofloxacin was not observed; 22 isolates (25%) were sensitive to all 9 antimicrobials, 36%, 25% and 12% of human, animal and wastewater origin, respectively, showing a significant difference. Salmonella ser. Hadar was the serovar with the highest resistance rates followed by Salmonella ser. Anatum and Salmonella ser. Typhimurium; Salmonella ser. Infantis strains were almost pansusceptible. Cluster analysis did not reveal close genetic relationship between human animal food and wastewater strains belonging to the same serovars. In most of the cases, distinct clusters were observed between human and non-human isolates indicating diversity and no epidemiological connection. This study indicates that municipal wastewater would be of interest to further monitor the community's prevalence of subclinical or non-reported S. Enterica infections. Keywords: Salmonella, wastewater, sewage, PFGE, antimicrobial resistance.

The study was conducted to determine the prevalence and viability of Campylobacter species isolates from different species of poultry and humans in Sokoto State, Nigeria. A cross-sectional study was performed in the live birds markets, humans on admission and at outpatient clinics in the randomly selected hospitals in Sokoto State. Isolation and characterization of Campylobacter species were performed using standard culture isolation techniques and biochemical characterization. A total of 798 (506 cloacal and 292 fecal) swabs from poultry and humans, respectively, were collected and analyzed. The viability of 307 isolates stored in 15% glycerol and 85% tryptone broth at -20℃ was determined after 7-13 months. A total of 312 (39%) were positive for Campylobacter species which comprises 119 (30%), 20 (30%), 3 (14%), 9 (56%), 1 (50%), and 160 (55%) in chicken, guinea fowls, pigeons, ducks, turkey, and humans, respectively. The total of 38 (24%), 63 (39%), and 59 (37%) humans and 29 (19%), 79 (52%), and 44 (29%) poultry isolates were positive for Campylobacter jejuni, Campylobacter Coli, and Campylobacter Lari, respectively. A total of 261 (85%) of the stored isolates were still viable on re-isolation with the viability rates of 41 (95%), 67 (85%), and 17 (59%) at 7, 9, and 13 months of storage, respectively. There was a negative correlation between months of storage and viability rates. However, there was no significant statistical association (p>0.05) between prevalence rate and species of poultry. Campylobacter species have been detected with varying degree of prevalence in both poultry and humans and their ability to survive freezing at -20℃ (95%) for up to 7 months has been revealed in the study. This is not only a concern to food and livestock industries but also a concern to the public health at large, especially, in view of the study area being considered one of the largest livestock producers in Nigeria. Campylobacteriosis is known to be associated with the cost of gastroenteritis management, antimicrobial resistance, food contamination, and complications such as a paralytic condition called Guillain-Barre syndrome. Keywords: Campylobacter species, humans, poultry, Sokoto, Nigeria.

This study investigated the prevalence and antibiotic resistance of Salmonella species isolated from drinking water sources in Tamale Metropolis. Isolation of Salmonella species from 275 different drinking water samples (25 each from dam, well, rain, and bottle, 35 from tap, 40 from water trough, and 100 from sachet) was done using a slightly modified method of the Bacteriological Analytical Manual of the Food and Drugs Administration, USA. 34 Salmonella species isolated from the water samples were examined for their susceptibility to nine different antibiotics using the disc diffusion method. The study was carried out from July 2014 to January 2015. The overall prevalence of Salmonella species was 4.36% (12/275). Dam 16.00% (4/25) and well 16.00% (4/25) water samples were the most contaminated source, followed by rain water (stored) 12.00% (3/25) and tap water samples 2.86% (1/35). There were no significant differences among water samples which were positive for Salmonella species (p>0.05); however, dam and well samples that were positive for Salmonella species differ significantly (p<0.05) from bottle water, sachet water, and water trough samples, which were negative for Salmonella species. The 34 Salmonella isolates were highly resistant to erythromycin (E) (100%) and vancomycin (VA) (94.12%). Few isolates exhibited intermediate resistances to ceftriaxone (CRO) (17.65%), gentamicin (CN) (17.65%), tetracycline (14.71%), chloramphenicol (C) (5.88%), ciprofloxacin (CIP) (2.94%), and amoxicillin (AMC) (2.94%). Salmonella isolates also exhibited six different antibiotic resistant patterns (VA-E, VA-E-AMC, VA-E-CRO, VA-E-C, VA-E-CRO-AMC, and VA-E-AMC-CN). The resistant pattern VA-E (with multiple antibiotic resistance index of 0.22) was the commonest. This study indicated that some drinking water sources for humans and animals in Tamale Metropolis are contaminated with Salmonella species which exhibited varying resistance to various antibiotics. Therefore, consumers of water at the Tamale Metropolis are at risk of Salmonella infection from drinking water from positive water sources in the Tamale Metropolis. Keywords: antibiotics, drinking water, public health, Salmonella species.

Brucellosis is the most common worldwide zoonosis with 500,000 new cases every year in humans and infections in millions of animals. This infection is mainly acquired by humans through consumption of unpasteurized milk and milk products from infected animals. Exposure can also occur occupationally in those who work closely with animals through contact with aborted fetuses and reproductive secretions. Animals acquire the infection from other infected animals through direct contact and vertical transmission. This infection is prevalent in all continents of the world except Antarctica, but its impact is more felt in developing countries where it is endemic in animals and humans. In certain developed countries where the disease was eradicated, there seem to be a re-emergence of the disease as the disease appears to claim more territory. The risk factors of the disease may vary from country to country and region to region, but most risk factors are similar. Consumption of unpasteurized milk and milk products plays a very important role in the transmission of this infection from animals to humans, in addition to direct contact with infected animals and their secretions. The best way to control this ubiquitous infection is through the One Health approach which involves human health, animal health, and environmental health. This paper reviews the prevalence of brucellosis in some countries in various continents of the world and highlights the risk factors responsible for the persistence of this infection in animals and humans with a view to proffering solution to this age-old zoonosis that has defied eradication for many generations in many parts of the world.

Salmonellosis is one of the most common zoonotic diseases, and the presence of antimicrobial resistant Salmonella in wild birds is global public health threat. Throughout the last decades, multidrug resistance of Salmonella spp. has increased, particularly in developing countries. Therefore, a cross-sectional study was conducted to investigate the prevalence of Salmonella spp. and antimicrobial resistance pattern against Salmonella spp. from two species of resident wild birds namely house crow (Corvus splendens) and Asian pied starling (Gracupica contra). Samples were collected from cloacal swabs of house crows and Asian pied starling for isolating Salmonella spp. (bacteriological culture methods) followed by antimicrobial susceptibility testing (disk diffusion method) against Salmonella spp. isolates during March to December 2014. The prevalence of Salmonella in Asian pied starling and house crows were 67% and 65%, respectively. Within the category of samples from different species, the variation in prevalence was not varied significantly (p>0.05). Isolated Salmonella spp. was tested for resistance to six different antimicrobial agents. Among six antimicrobial tested, 100% resistance were found to penicillin, oxacillin, and clindamycin followed by erythromycin (50-93%), kanamycin (7-20%), and cephalothin (30-67%) from both species of birds. Kanamycin remained sensitive in (70-73%), cephalothin (26-70%), and erythromycin appeared to be (0-30%) sensitive against Salmonella spp. isolates. Isolated Salmonella spp. was multidrug resistant up to three of the six antimicrobials tested. It can be said that the rational use of antimicrobials needs to be adopted in the treatment of disease for livestock, poultry, and human of Bangladesh to limit the emergence of drug resistance to Salmonella spp. Keywords: antimicrobial, prevalence, resistance, resident wild birds, Salmonella.

Recent trends in comparative animal and human research inform us that collaborative research plays a key role in deciphering and solving cancer challenges. Globally, cancer is a devastating diagnosis with an increasing burden in both humans and dogs and ranks as the number three killer among humans in Kenya. This study aimed to provide comparative information on cancers affecting humans and dogs in Nairobi, Kenya. Dog data collection was by cancer case finding from five veterinary clinics and two diagnostic laboratories, whereas the human dataset was from the Nairobi Cancer Registry covering the period 2002-2012. The analysis was achieved using IBM SPSS Statistics® v.20 (Dog data) and CanReg5 (human data). The human population was estimated from the Kenya National Census, whereas the dog population was estimated from the human using a human:dog ratio of 4.1:1. A total of 15,558 human and 367 dog cancer cases were identified. In humans, females had higher cancer cases 8993 (an age-standardized rate of 179.3 per 100,000) compared to 6565 in males (122.1 per 100,000). This order was reversed in dogs where males had higher cases 198 (14.9 per 100,000) compared to 169 (17.5 per 100,000) in females. The incident cancer cases increased over the 11-year study period in both species. Common cancers affecting both humans and dogs were: Prostate (30.4, 0.8), the respiratory tract (8.3, 1.3), lymphoma (5.6, 1.4), and liver and biliary tract (6.3, 0.5), whereas, in females, they were: Breast (44.5, 3.6), lip, oral cavity, and pharynx (8.8, 0.6), liver and biliary tract (6.5, 1.2), and lymphoma (6.0, 0.6), respectively, per 100,000. The commonality of some of the cancers in both humans and dogs fortifies that it may be possible to use dogs as models and sentinels in studying human cancers in Kenya and Africa. We further infer that developing joint animalhuman cancer registries and integrated cancer surveillance systems may lead to accelerated detection of the risks of cancer in Africa. Keywords: Africa, cancer, cancer registry, comparative oncology, Kenya, Nairobi, One Health.

Canine vector-borne diseases constitute a large group of diseases transmitted by arthropods with worldwide distribution. A wide range of bacterial, viral, and parasitic agents that are transmitted by vectors cause disease to dogs, many of which can also affect humans and thus have an important zoonotic potential. Bacterial agents that are transmitted by vectors have been considered less important than viral or parasitic agents and are not commonly discussed in companion animal practice. However, close contact between pet animals and people offers favorable conditions for transmission of these bacteria. Many of these diseases have become a focus of interest for scientists in recent years. Increase in reservoir abundance, climate change, changing habitat structure, socio-political changes, and imports of dogs for welfare reasons and trade as well as traveling are considered to be potential factors for the pathogens and vectors introduction into new areas. Apart from, the veterinary aspect of these diseases, domestic dogs could play a central epidemiological role in the transmission of bacterial agents to humans, acting as reservoirs and sentinels, a circumstance that requires a One Health approach. This review highlights the most important of these bacterial agents, presenting updated current knowledge with special reference to treatment approach and One Health aspect.

The emergence of multidrug-resistant (MDR) bacteria is the most dangerous threat for the treatment of infectious diseases. The aim of this study was to detect and characterize extended spectrum beta-lactamases (ESBLs) and carbapenemase-producing Klebsiella pneumoniae and Escherichia coli among patients and environment of intensive care units (ICUs) of three tertiary care hospitals in Pakistan. A total of 82 samples from ICU's patients and inanimate environment (injection trays, wash basins, door handles, hand swabs of professionals, and ICU fridges) were screened for ESBL by culturing on CHROMagar-ESBL. ESBL and carbapenemases production were confirmed by double disc synergy test and modified Hodge's test, respectively. Polymerase chain reaction was used to detect ESBL encoding genes bla cefotaxime (CTX-M), blaCTX-M-1, blaCTX-M-2, blaCTX-M-9, blaTEM, blaSHV and carbapenemase genes blaKPC, bla New Delhi metallo-beta-lactamase-1, blaOXA-48 and blaVIM. Overall, ESBL production was found high 30/82 (36.5%) among isolates of which 15.8% K. pneumoniae and 20.7% E. coli were identified. All the K. pneumoniae and majority of E. coli isolates were MDR, i.e., resistance to three or more antimicrobial categories. Molecular characterization showed the blaCTX-M-1 as the predominant genotype found in 17/21 (80%) of the isolates. None of the strains was found positive for carbapenemase-encoding genes. In conclusion, this study demonstrates the emergence of MDR ESBL producing strains among ICU patients and hospital environment, posing a serious threat for the control of nosocomial infections. Keywords: antimicrobial resistance, Escherichia coli, extended spectrum beta lactamase, Klebsiella pneumoniae, nosocomial infections.

Antimicrobial residue in animal food products is an important index of food safety. Antimicrobial residues could result from chemotherapeutic or chemoprophylactic use of drugs in food animals. This occurrence of residue in animal food products has received enormous worldwide attention from some local, international, and public health agencies. A crosssectional study was conducted from July to December 2009 to detect the antibiotic residues in tissues and eggs of laying hens at Chittagong of Bangladesh. Microbial inhibition test (MIT) and thin layer chromatography (TLC) methods were used to detect antibacterial residues in poultry tissues (liver, kidney, breast, and thigh muscles) and eggs. The bacteria and pH of the MIT method were as follows: Bacillus subtilis on test agar medium with a pH of 7.2, Bacillus cereus with a pH of 6.0, and Escherichia coli at pH with an 8.0. The overall prevalence of antibiotic residues detected by MIT was 64% in liver, 63% in kidney, 56% in breast muscle, 50% in thigh muscle, and 60% in eggs. There was significant variation in results between MIT and TLC (p<0.05). Tetracycline residues were found in 48% in liver, 24% in kidneys, 20% in thigh muscles, 26% in breast muscles, and 36% in eggs. Ciprofloxacin residues were found 46% in liver, 42% in kidneys, 34% in thigh muscles, 30% in breast muscles, and 30% in eggs. Enrofloxacin residues were found 40% in livers, 36% in kidneys, 24% in thigh muscles, 20% in breast muscles, and 26% in eggs. Amoxicillin residues were found 48% in livers, 30% in kidneys, 26% in thigh muscles, 22% in breast muscles, and 24% in eggs. The most frequently detected antibiotic residues by both MIT and TLC were found in liver tissue, tetracycline (48%), ciprofloxacin (46%), enrofloxacin (40%), and amoxicillin (42%) were found in liver. Breast muscle tissue was least likely to contain antibiotic residues (24%). Tetracycline (p=0.01) and amoxicillin (p=0.03) residues had significant variation among the various poultry tissues and eggs. A high percentage of tissues and eggs that could be available for human consumption had antibiotic residues. This study suggests that poultry meat and eggs should not be circulated to markets until the end of the drug's withdrawal period. It is also recommended to observe the withdrawal period of drugs before poultry slaughter or table egg distribution to avoid antimicrobial resistance and to inform both owners and consumers about the risks of antibiotic residues. Keywords: antimicrobial, eggs, microbial inhibition test, poultry, thin layer chromatography, tissues.