Draft Genome Sequences of Two Clinical Mastitis-Associated Escherichia coli Strains, of Sequence Type 101 and Novel Sequence Type 13054, Isolated from Dairy Cows in Bangladesh

Here, we report the draft genome sequences of two Escherichia coli strains that were isolated from raw milk samples obtained from lactating cows with mastitis in Bangladesh. One strain was assigned to a novel sequence type 13054, and the other strain belonged to sequence type 101.

Maximization of Livestock Anthrax Vaccination Coverage in Bangladesh: An Alternative Approach

Low vaccination coverage of livestock is one of the major challenges to control anthrax in Bangladesh. This study was conducted to assess an alternate approach to maximize vaccination coverage. The method included traditional vaccination campaigns, livestock census, interviews, focus group discussions of cattle farmers, vaccination and livestock personnel, and validation workshops. It was observed that a mass vaccination program covered only 44% of the cattle population. It was found that 54.1% of the respondents did not bring their cattle to mass vaccination programs due to the difficulties of handling cattle and that there was no male member in the household. Only 12.5% of respondents acknowledged that they were not aware of the vaccine, and 3% of the respondents claimed that they ignored vaccination due to cost. All of the respondents from livestock personnel agreed that manpower was not enough to cover the total area. Further, 20% of vaccinators mentioned that they did not get enough vaccines. For an effective vaccination program, 58.33% of respondents recommended door-to-door service, and 54.16% of respondents suggested to arrange regular vaccination campaigns in six-month intervals. Thus, regular campaigns with door-to-door vaccination services are suggested to control anthrax outbreaks in Bangladesh.

First Genome Sequence of Pasteurella multocida Type B Strain BAUTB2, a Major Pathogen Responsible for Mortality of Bovines in Bangladesh

Here, we report the first genome sequence of Pasteurella multocida BAUTB2 isolated from a buffalo that died from hemorrhagic septicemia in Rajshahi, Bangladesh. Using Illumina HiSeq technology, the BAUTB2 genome length was determined to be 2,439,149 bp, with 40.8% GC content, 2,307 coding sequences (CDS), 6 rRNAs, 51 tRNAs, and 4 noncoding RNAs (ncRNAs).

Antibiotic Resistance: New Challenge in the Management of Bacterial Eye Infections

Ophthalmologists are still facing difficulties in managing bacterial eye infections. The study was designed for the isolation and identification of bacteria from infected eyes and observation of the sensitivity and resistant pattern. This cross sectional study was performed among 160 patients of suspected bacterial eye infection at Dr. K. Zaman BNSB Eye Hospital, Mymensingh and Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh from March, 2010 to June, 2014. After collection of the samples from suspected infected eyes, it was nourished into nutrient broth in shaking incubator for three hours and then cultured into nutrient agar media followed by Mannitol salt agar, MacConkey's agar and blood agar. Bacteria were categorized by colony characteristics and Gram staining. Antibiogram was performed by disc diffusion method on Mueller Hinton agar media. McFarland Equivalence Turbidity Standard was maintained. The efficacy of the drug was evaluated by measuring the diameter of the zone of inhibition surrounding the disc. Ten percent Staphylococcus species isolates was resistant to Gatifloxacin, Gentamicin, Tobramycin and Cloxacillin, 26.0% to Ciprofloxacin, 40.0% to Azythromycin and Moxifloxacin, 58.0% to Cefixime and 64.0% to Cephalexin. Methicillin resistant Staphylococcus aureus was 62.8%. About 24.0% Streptococcus species isolates was resistant to Gatifloxacin, 33.3% to Azythromycin, Ciprofloxacin, Gentamycin, Moxifloxacin and Tobramycin, 52.4% to Cefixime and 71.4% to Cephalexin. About 9.0% of Pseudomonas species was resistant to Gatifloxacin and Tobramycin, 14.7% to Ciprofloxacin, 26.5% to Cefixime, 29.4% to Gentamicin and Moxifloxacin, 44.1% to Azythromycin and 82.3% to Cephalexin and Cloxacillin. Rational use of antibiotics and proper attentions of concerned authorities are necessary to overcome the emergent ocular situation leaded by antibiotic resistant.

Management of Infective Corneal Ulcer: Epidemiology Needs To Be Evaluated As Priority Basis

Because of known and unknown etiology, management of ocular devastating situation like corneal ulcer is still a challenge for the Ophthalmologists. The cross sectional study was designed for detection of predisposing factor and identification of causal agent. To serve the above purpose, a cross sectional study was performed among 140 patients of the corneal ulcer at Dr K Zaman BNSB Eye Hospital, Mymensingh and Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh. Detail history of patient was taken and recorded in a pretest questionnaire sheet. Two pieces of sample were collected from each corneal ulcer patient. One sample was examined in KOH wet mount for fungus. Other sample was nourished into nutrient broth and for further culture and identification. Bacterial corneal ulcer was higher among the patient of age group ≥46 years (61.9%) followed by 31-45 years (21.5%). P value is 0.261. Males were found predominant (58.5%). P value is 0.13. Agricultural related work was identified as most risky occupation in 83.1% of the total bacteria positive samples. P value is 0.01. Trauma was noted as most predominant influencing factor (56.9%). P value is <0.05. Bacteria were identified in 65(46.4%) and fungus in 40(28.6%) samples. Pseudomonas species were predominant (52.3%) followed by Staphylococcus species (26, 2%) and Streptococcus species (21.5%). No mixed infection was identified. For easier and earlier diagnosis of corneal ulcer, information about epidemiology is very essential. History should be taken meticulously followed by the laboratory procedures.

Prevalence and characterization of multi-drug resistant Salmonella Enterica serovar Gallinarum biovar Pullorum and Gallinarum from chicken

AIM

Salmonella is an important zoonotic pathogen responsible for animal and human diseases. The aim of the present study was to determine the prevalence and stereotyping of Salmonella isolates isolated from apparently healthy poultry. Furthermore, the clonal relatedness among the isolated Salmonella serovars was assessed.

MATERIALS AND METHODS

A total of 150 cloacal swab samples from apparently healthy chickens were collected, and were subjected for the isolation and identification of associated Salmonella organisms. The isolated colonies were identified and characterized on the basis of morphology, cultural characters, biochemical tests, slide agglutination test, polymerase chain reaction, and pulsed-field gel electrophoresis (PFGE). Antibiotic sensitivity patterns were also investigated using commonly used antibiotics.

RESULTS

Of the 150 samples, 11 (7.33%) produced characteristics pink colony with black center on XLD agar medium, and all were culturally and biochemically confirmed to be Salmonella. All possessed serovar-specific gene SpeF and reacted uniformly with group D antisera, suggesting that all of the isolates were Salmonella Enterica serovar Gallinarum, biovar Pullorum and/or Gallinarum. Antimicrobial susceptibility testing revealed that 54.54% of the isolated Salmonella Enterica serovars were highly sensitive to ciprofloxacin, whereas the 81.81% isolates were resistant to amoxycillin, doxycycline, kanamycin, gentamycin, and tetracycline. Pulsed-field gel electrophoresis of the XbaI-digested genomic DNA exhibited identical banding patterns, suggesting that the multidrug resistant Salmonella Enterica serovars occurring in commercial layers are highly clonal in Bangladesh.

CONCLUSION

The present study was conducted to find out the prevalence of poultry Salmonella in layer chicken and to find out the clonal relationship among them. The data in this study suggest the prevalence of Salmonella Enterica, which is multidrug resistant and highly clonal for commercial layers of Bangladesh.

Poultry Salmonella Specific Bacteriophage Isolation and Characterization

Bacteriophage named as SAL-PG (Salmonella bacteriophage), specific to Salmonella pullorum and Salmonella gallinarum was isolated by an enrichment method directly from waste water near to poultry farm. For the isolation of phage 4.5 ml water sample, 0.5 ml of 10X Nutrient Broth and 0.5 ml of log phage bacteria were mixed well and incubated at 37° C for overnight followed by centrifugation at 10,000 rpm for 10 minutes. The presence of bacteriophage was observed by spot test over the bacterial lawn of and plaque assay. The host range of the isolated bacteriophage was determined by spot test using 12 different bacterial isolates. The phages were found to infect Salmonella pullorum, Salmonella gallinarum and Salmonella typhimurium and produced clear plaque on these Salmonella serovars. The bacteriophage was able to survive in wide range of pH between 2 to 9 and resistant at 60° C for 1 hour. More than 50% phages were readily adsorbed to the host bacteria. The restriction enzyme analysis showed that the phage DNA possess restriction site for Taq?I, HindIII and BstYI; but no restriction site for XhoI and BstEII as these two enzymes failed to digest the phage DNA. The characterizations of the bacteriophage would be helpful in establishing a basis for adopting the application of the most effective bacteriophage treatment to control these poultry bacteria.DOI: http://dx.doi.org/10.3329/bjvm.v12i2.21264 Bangl. J. Vet. Med. (2014). 12 (2): 107-114 

Prevalence of Brucella antibodies in sera of cows in Bangladesh

The study was carried out to investigate the prevalence of Brucella antibodies in sera of 120 cows in Bangladesh Agricultural University Dairy Farm and adjacent villages, Bangladesh. The epidemiological history and blood was collected from the cows. The serum samples were subjected to Rose Bengal Test (RBT) and plate agglutination test (PAT) for initial screening of Brucella antibodies and the positive sera samples were then subjected to tube agglutination test (TAT) for further confirmation. The higher rate of Brucella antibody was recorded in rural farm (5.0%) than organized farm (2.5%) and in pregnant cows (5.9%) than non-pregnant cows (4.7%). A total of 3(4%) Brucella positive antibody cases were recorded in cows of above four years of age whereas, 1(2.3%) positive case was found in cows of less than 4 years of age. The study revealed that number of Red Shindi was the highest and the prevalence of brucellosis in Bangladesh cow population is not negligible and it is worthwhile to consider adoption of preventive measures.

Disability in schizophrenia and mood disorders in a developing country

The aim of this study was to investigate how the prevalence and severity of psychiatric disabilities in patients with chronic schizophrenia compares with that in patients with chronic mood disorders. A total of 128 patients, 80 with chronic schizophrenia and 48 with chronic mood disorders as confirmed by DSM-III-R, were examined using the World Health Organization Psychiatric Disability Assessment Schedule (WHO/ DAS). There were no significant differences in the prevalence and severity of disabilities between the two disorders. Two-thirds of the patients with chronic schizophrenia and over half the patients with chronic mood disorders had dysfunctional behaviour and experienced significant disabilities. The prevalence of disabilities among these Malaysian patients was not markedly different from that seen in developed countries, suggesting that the prognosis in developing countries may not be as favourable as previously thought.

Bacterio-pathological Studies on Salmonellosis, Colibacillosis and Pasteurellosis in Natural and Experimental Infections in Chickens

Bacterio-pathological investigation on 1751 dead chickens during one year period from January to December 2002 at the BRAC Poultry Disease Diagnostic Centre, Gazipur showed that 39.81% (n=697) cases with seven types of different bacteriological diseases of which salmonellosis (n=385), colibacillosis (n=147) and fowl cholera (n=114) were found significantly higher rate of prevalence then staphylococcosis (n=6),  gangrenous dermatitis (n=17), necrotic enteritis (n=24) and infectious coryza (n=4). Accordingly, avian salmonellosis, colibacillosis and pasteurellosis were selected for detailed investigation. Age wise prevalence of avian salmonellosis showed highest infection rate in adult layers (53.25%) in comparison to brooding (14.55%), growing (16.10%) and pullet (16.10%) chickens. The avian colibacillosis was found widely prevalent in all age groups of chickens (9.52 to 36.73%) with specially high prevalence rate in adult layer birds (36.73%). Fowl cholera was recorded in chickens more than two weeks of age with significantly (p < 0.01) highest occurrence in adult chickens. Seasonal influence showed significantly (p < 0.01) highest proportionate prevalence of salmonellosis during summer (48.05%) in comparison to rainy (28.31%) and winter (23.66%) seasons. Colibacillosis was recorded more or less uniformly in all the three seasons of the year with significantly (p < 0.01) higher rate during summer (40.82%) season. Similarly, the prevalence of fowl cholera was also found significantly (p < 0.01) highest during summer (49.12%) in comparison to rainy (26.32%) and winter (24.56%) seasons. The isolated causative agents of avian salmonellosis (Salmonella pullorum), avian colibacillosis (Escherichia coli) and avian pasteurellosis (Pasteurella multocida) were characterized by bacteriological methods which were also subjected to pathogenicity study in 52-day old broiler chickens. Pathogenicity study showed that the incubation period of these three bacterial diseases were recorded as 96 hours and clinical signs appeared on 4th day of inoculation and observed that S. pullorum, E. coli and P.  multocida resulted 100% morbidity in chickens. Key words: Characterization; pathogenicity; salmonellosis; colibacillosis; pasteurellosis; chickens doi: 10.3329/bjvm.v2i1.1926 Bangl. J. Vet. Med. (2004). 2(1) : 01-08

Determination of Efficacy of Thermostable PPR Live Homologous Vaccine Incubated at Room Temperature for 14 Days

The study was undertaken during the period from July to November 2005, for the first time, to determine the efficacy of thermostable PPR vaccine incubated at -20°C and room temperature (RT) for 14 days which was developed by Bangladesh Livestock Research Institute (BLRI), Savar, Dhaka, in collaboration with and Livestock Research Institute (LRI), Mohakhali, Dhaka. A total of 80 healthy goats of both sexes, aged between 8 to 36 months were divided into three groups as A, B and C. Group A and B comprised of 30 goats each and received thermostable PPR vaccine kept at -20°C and at room temperature (RT) respectively for 14 days, at a dose rate of 1 ml (4 Log10 TCID50 / ml) per goat subcutaneously while group C comprising 20 goats served as non-vaccinated control. At 30 days postvaccination, 3 goats from each vaccinated and non-vaccinated group were challenged with 1 ml (5 GID50) of virulent PPR virus per goat subcutaneously in the mid cervical region. Sera samples were collected from all the groups at pre- and post-vaccination (15 and 30 days postvaccination) and were tested for anti-PPR antibody by competitive enzyme linked immunosorbent assay (C-ELISA). In case of group A, average percent inhibition (PI) values of the sera samples at prevaccination and at 15- and 30 days post vaccination were 11.0 ± 5.7, 62.8 ± 9.9 and 81.5 ±5.9 respectively and in case of group B, were 10.0 ± 4.1, 60.7 ± 9.4 and 79.3 ± 7.2 respectively, which were significantly (p < 0.01) higher than those of non-vaccinated control goats (6.3 ± 3.4, 10.2 ± 3.3 and 13.6 ± 3.7 respectively). The titres of vaccinated goats gradually increased until 30 days postvaccination. The challenge test with virulent PPR virus at 30 days post vaccination showed that the thermostable PPR vaccine with both incubation temperatures at -20°C and RT for 14 days protected all the goats (100%) of groups A and B respectively while all the non-vaccinated control goats were not protected after challenge showing clinical signs of PPR and / or mortality. From the above findings it may be concluded that the thermostable PPR vaccine can be kept at normal environmental temperature (25°-30°C) as long as 14 days without loss of its potency and may be used to prevent PPR in goats in field condition.Key Words: Thermostable PPR vaccine, efficacy, C-ELISAdoi:10.3329/bjvm.v4i1.1524 Bangl. J. Vet. Med. (2006). 4 (1): 43-46

Comparative Serological Responses and Protection Conferred by Vaccination with V4HR and BCRDV in Chickens

The serological responses and protection of Sonali breed chickens with Australian Newcastle disease V4 heat resistant (NDV4HR) live freeze-dried vaccine (Australian Webster Pvt. Ltd., Sydney) was compared with that of locally produced conventional Lentogenic F-strain Baby Chick Ranikhet Disease vaccine (BCRDV, DLS, Dhaka) of Bangladesh. Thirty day-old chicks were purchased from Mirpur Govt. Poultry Farm, Dhaka and maintained hygienically with commercial feed and water supply ad libitum during the experimental period from November 2002 to January 2003. These birds were divided into three groups (A, B and C), each consisting of 10 birds. Each birds of group A was vaccinated with NDV4HR and group B with BCRDV intraocularly, primary vaccination at 7 days and booster vaccination at 28 days of age, whereas the birds of group C kept as control. Sera samples of each of the bird of all the three groups were collected at 14 days of post-vaccination following each of the primary and booster vaccination at 23 and 44 days of age of birds. Each of the serum sample of all the three groups of birds was titrated by using haemagglutination inhibition (HI) test and results recorded that both the NDV4HR (32.49 ± 23.94) and BCRDV (28.28 ± 10.54) produced more or less similar serological response at two weeks after booster vaccination. The results of challenged experiment showed that the NDV4HR vaccine ( 80% ) apparently conferred higher protection to birds than the BCRDV vaccine (70%). Therefore both the vaccines may be recommended to control ND in commercial chickens but NDV4HR vaccine could provide a practical method of control ND in rural scavenging chickens. Key words: Serological responses, F-strain (BCRDV) NDV4HR vaccine, HI antibody titre, protection, chickens DOI = 10.3329/bjvm.v1i1.1913 Bangl. J. Vet. Med. ( 2003 ). 1 (1) : 25 - 27

In vitro antibiotic sensitivity and therapeutic efficacy of experimental salmonellosis, colibacillosis and pasteurellosis in broiler chickens

Avian salmonellosis (AS), avian colibacillosis (AC) and avian pasteurellosis (AP) have been recognized as important bacterial diseases in poultry associated with morbidity and mortality in Bangladesh. The causative agents of these three diseases were isolated (5 isolates / disease) from dead chickens submitted for diagnosis at the BRAC Poultry Disease Diagnostic Centre, Gazipur during the period from January to December 2002. Five isolates of each of the Salmonella pullorum, Escherichia coli and Pasteurella multocida were evaluated against eight antibiotic containing disc which included ciprofloxacin, gentamicin, ampicillin, chloramphenicol, erythromycin, tetracycline, cephradine and penicillin G. Erythromycin in S. pullorum and Ciprofloxacin both in the E. coli and P. multocida were found highest sensitive, gentamicin, chloramphenicol, cephradine were found moderately sensitive to S. pullorum, gentamicin, tetracycline, erythromycin and ampicillin were found moderately sensitive to E. coli, and gentamicin ampicillin, cephradine and penicillin G were moderately sensitive to P. multocida. Therapeutic trials against experimentally produced S. pullorum, E. coli and P. multocida infection in three groups of broiler chickens showed that cephradine against S. pullorum and ciprofloxacin against both in E. coli and P. multocida were found highly effective both in vitro and in vivo studies, therefore, cephradine against salmonellosis and ciprofloxacin against colibacillosis and pasteurellosis are effective drugs of choice which could be used to control morbidity and mortality in poultry caused by these diseases.Key words: antibiotic sensitivity; salmonellosis; colibacillosis; pasteurellosis, broiler chickensdoi: 10.3329/bjvm.v2i2.2538Bangl. J. Vet. Med. (2004). 2 (2): 99-102

Effect of vitamins, minerals and probiotics on production of antibody and live weight gain following vaccination with BCRDV in broiler birds

The effect of vitamins, minerals and probiotics supplementation to the balanced ration of the broiler chicks on the immune response and growth performance after vaccination with BCRDV was evaluated. For this 50 broiler birds were divided into five equal groups such as A, B, C, D and E, and five types of separate treatments with normal poultry feed were provided to the indivisual experimental groups. All the birds were vaccinated with BCRDV primarily at 3 days of age and boostered at 17 days of age. The birds of group A, B, C and D were supplemented with only probiotics, mixture of probiotics and minerals, mixture of probiotics, minerals and vitamins, respectively. The birds of group E were kept as vaccinated control. Blood samples were collected at the age of 9, 12, 16, 23, 26 and 30 days sequencially. The serum antibody titres were measured by HI test and ELISA. The highest value of HI antibody titre was 384±242.65 (Mean ±SD) in group B at 23 days of age. The lowest value of HI at 23 days was 56±32.86 (Mean ±SD) obtained in group C. The ELISA antibody titre was also highest (4675.12±485.72) at 23 days in group B and obviously the lowest (2169.38±724.45) in control group E. In case of group C, the ELISA antibody titre was 3105.73±877.57 at 23 days but then the titre decreased gradually compared to control group. The highest body weight (1420±90.82) was recorded at 30 days of age in group D and the lowest value (1188±44.38) was in group B. Key words: Probiotics, BCRDV, broiler birds DOI = 10.3329/bjvm.v6i1.1336 Bangl. J. Vet. Med. (2008). 6 (1): 31-36