1.Molecular prevalence of Anaplasma marginale in ruminants and Rhipicephalus ticks in northern Pakistan
Ali, S. ; Hasan, M. ; Ahmad, A.S. ; Ashraf, K. ; Khan, J.A. ; Rashid, M.I.
Tropical Biomedicine 2023;40(No.1):7-13
Anaplasma marginale is the most prevalent tick-borne haemoparasite of cattle and causes huge
economic losses to the dairy industry worldwide. This study aimed to determine the occurrence of A.
marginale infection in blood and tick samples collected from livestock animals in the districts located
in Khyber Pakhtunkhwa (KPK), Pakistan. A total of 184 blood and 370 tick samples were included in this
study. It has never been reported that sheep, goats, and cattle in Tank, Ghulam Khan, Birmil and Miran
Shah areas were infected with A. marginale. All samples of blood and ticks were collected through
random sampling from March 2021 to January 2022 from cattle, sheep and goats and screened through
PCR for anaplasmosis by using primer pairs of Anaplasma spp. Three hundred and seventy ticks were
collected from infested hosts (120/184, 64.21%). Among the four morphologically identified tick species,
the highest occurrence was recorded for Rhipicephalus sanguineus (n=138, 37.29%), followed by
Rhipicephalus microplus (n=131, 35.4%), Rhipicephalus annulatus (n=40, 10.81%), Hyalomma anatolicum
(n=31, 8.37%), and Hyalomma marginatum (n=30, 8.1%). The occurrence of female tick was highest
(n=160, 43.24%), followed by nymphs (n=140, 37.38%) and males ticks (n=70, 18.9%). Among these ticks,
A. marginale was detected in female ticks of R. microplus, and R. sanguineus. Molecular identification
of A. marginale was confirmed in 120 out of 184 blood samples and 6 out of 74 tick samples. Overall,
occurrence of A. marginale in blood and tick samples was found to be 65.21% and 8.1% respectively.
Species-wise occurrence in blood samples of goats were 71.11% followed by sheep 68.31% and cattle
50%. Specie-wise occurrence of A. marginale in tick samples of cattle were 12.5% followed by goats
6.89%. The obtained sequence showed similarity with A. marginale reported from Kenya and USA. We
report the first PCR based detection of A. marginale infection in blood samples and in R. sanguineus
ticks of goats simultaneously.
2.Reactive atrial‑based anti‑tachycardia pacing algorithm in cardiovascular implantable electronic devices is safe and feasible without increase in thromboembolic events in patients with a left atrial appendage closure device
Cody CARTER ; Zeryab KHAN ; Rayan EL‑ZEIN ; Marie LOCKHART ; Ankur SHAH ; David NEMER ; Jaret TYLER ; Eugene FU ; Auroa BADIN ; Sreedhar R. BILLAKANTY ; Anish K. AMIN ; Nagesh CHOPRA
International Journal of Arrhythmia 2023;24(4):22-
Background:
Reactive atrial-based anti-tachycardia pacing (rATP) in CIED (cardiovascular implantable electronic devices) is effective in atrial fibrillation (AF) suppression. Uninterrupted systemic anticoagulation is recommended when this algorithm is activated to avoid stroke, however, the use of a rATP algorithm in patients with a left atrial appendage (LAA) closure device has not been studied. We assessed the safety and feasibility of rATP algorithm to sup‑ press AF in patients with a LAA closure device over an extended period.
Methods:
Data from 55 consecutive patients who underwent a Watchman® implant at a tertiary care hospital between September 1, 2015, and January 30, 2020, who also had an in situ Medtronic® CIED (45 with and 10 with‑ out rATP capability) were retrospectively reviewed.
Results:
The 55-patient cohort was 60% male, 77 ± 8 years old, CHA2DS2 -VASc score 5 (4–6), HAS-BLED score 3 (3–4), LVEF 53 ± 14%, LA size 4.4 ± 0.7 cm and ventricular pacing burden of 73 (1.4–98.3)%. The CIEDs (20 ICDs and 35 pace‑ makers) antedated Watchman® implants by 915 ± 725 days. Post-implant, all patients discontinued anticoagulation.Twenty patients in the rhythm-control group with active rATP algorithm displayed no increase in yearly AF burden and were less likely to develop permanent/long-standing persistent AF (p = 0.002) when compared to 35 patients in the rate-control group with CIEDs inactive/incapable of rATP over a ≤ 5-year follow-up. The longest AF episode in the rhythm-control group lasted 204 (19–2520) h. There was no increase in stroke/thromboembolism and a significant reduction in major bleeding noted over ≤ 5 years pre- versus post-implant in the whole cohort (p = 0.005).
Conclusion
rATP algorithm use is safe and feasible in patients with a Watchman® device. Patients should be fore‑ warned of a surge in post-Watchman® implant AF burden.
3.Sero-epidemiology and risk factor analysis of human brucellosis in Punjab, Pakistan: a cross sectional study
Nawaz, Z. ; Shafique, M. ; Zahoor, M.A. ; Siddique, A.B. ; Ali, S. ; Arshad, R. ; Kausar, S. ; Khan, K. ; Asad, M. ; Rehman, A.U. ; Masih, I.
Tropical Biomedicine 2021;38(No.3):413-419
Human brucellosis is a neglected zoonotic problem worldwide with a high degree of morbidity in humans and is mostly overlooked due to other febrile conditions. The aim of this study was to evaluate the sero-prevalence and risk factors of human brucellosis among subjects living in Punjab, Pakistan. In this cross-sectional study, human blood samples were collected from seven districts of Punjab, Pakistan. Information regarding personal data, demographic data and potential risk factors was collected through a structured questionnaire. Detection of anti-Brucella antibodies was done through Rose Bengal Plate Test (RBPT) and Enzyme Linked Immunosorbent Assay (ELISA). Descriptive analysis, Chi square test and Odds ratio was applied using STATA software version 12. The sero-prevalence of human brucellosis was 13.13% with significantly higher percentage in males 17.23% and age group 25-40 years 16.50% (P=< 0.001). The demographic factors positively associated with human brucellosis were lack of education (P = 0.003; OR = 1.85) and farming as an occupation (P =<0.001; OR = 2.50) Similarly, among the risk factors studied, keeping animals at home (P =<0.001; OR = 2.03), slaughtering of animals (P =<0.001; OR = 15.87) and consuming raw milk (P =<0.001; OR = 5.42) were the factors strongly connected with human brucellosis. A massive awareness should be given to livestock farmers and individuals directly linked to animals regarding risk factors and transmission of brucellosis. Consumption of unpasteurized milk and its products should be condemned to curtail this neglected disease.
4.Seroprevalence of low avidity anti-Toxoplasma IgG in pregnant women and its relationship with their age and contact with cats
Khan, K. ; Khan, W. ; Khan, T. ; Naaz, G. ; Naheda, A. ; Aqeel, S.
Tropical Biomedicine 2020;37(No.4):1038-1049
Toxoplasma gondii is a protozoan parasite that can infect all mammals, serving as
intermediate hosts. The cause of congenital toxoplasmosis is transplacental transmission of
the parasite to the foetus, resulting in wide range of manifestations from mild chorioretinitis
to miscarriage. Its frequency can be reduced by early screening of pregnant women which is
based mainly on tests for anti-Toxoplasma antibodies. We collected serum samples of 594
pregnant women (subjects) after taking their consent over a period of two years (2016-2018)
and analyzed them for anti-Toxoplasma IgG by ELISA. The positive samples were then
analyzed for IgG avidity test which could differentiate between recent and past infections.
The seroprevalence was also correlated with the age of the subjects and their contact with
cats. 162 subjects were found positive out of which only three showed a recent infection.
After following up until delivery, one of them delivered a baby who had jaundice and was
diagnosed with anti-Toxoplasma IgM at birth. The foetus of the second subject died in-utero,
while the third woman delivered a normal baby after being given spiramycin when diagnosed
with toxoplasmosis in the first trimester. It was found that most of the positive subjects had
frequent contact with cats. Invasion of the parasite during third trimester resulted in death
in-utero and jaundice. Most common cause of pregnancy wastage during our study was
spontaneous abortions while pregnancy loss due to congenital anomalies was rare.
5.Posture Related Musculoskeletal Disorders (MSDs) among Computer Users in Higher Education Sectors of Malaysia
Sahar Husain Khan ; Tharma Raj Chandra Mohan ; Al Abed Ali Al Abed ; Swamy K B ; Amiya Bhumik
Malaysian Journal of Medicine and Health Sciences 2020;16(Supp 10, November):71-78
Introduction: Computer usage has become an indispensable tool in the official set up of all the workplaces in the
current era. Predominance of musculoskeletal disorders (MSDs) in relation to habitual posture during work is the
utmost problem of modern society. Teaching staff stand out amongst a group of workers exposed to occupational
MSDs. The objective of this study was to identify the prevalence and risk factors of musculoskeletal disorders in
relation to posture and computer ergonomics at workplace among the college and university staff in Petaling Jaya,
Malaysia. Methods: This cross-sectional quantitative study was conducted from August 2019-October 2019, among
419 volunteers by using a self-administered survey questionnaire. Descriptive and bivariate statistics were used for
the analyses of multiple variables. The association between demographic characteristics, computer ergonomics and
prevalence of musculoskeletal pains were analyzed through Chi-square test. Results: 55.8 % respondents (n=234)
reported neck pain (NP), (n=196) 46.8% shoulder pain (SP) and (n=308) 73.5% low back pain (LBP) respectively.
A significant relationship between desktop computer usage and musculoskeletal pains in LBP (P=0.036) and SP
(P=0.023) was observed. Significant association of head posture was found with NP (P=0.002), SP (P=0.042) and
LBP (P=0.001), correspondingly. Discussion: Habitual postures were significantly associated with musculoskeletal
pains while using computer. Conclusion: This study proved with precession that higher prevalence rate of musculoskeletal disorders was undoubtedly influenced by prolonged sitting, awkward postures at workstation, and repetitive
movements of shoulders and hands. Further synchronous studies are vital to limit the modern era of musculoskeletal
disorders
6.The health burden of malaria and household choices regarding treatment and prevention in Pakistan
Khan, M. ; Mahmood, H.Z. ; Noureen, S. ; Muhmood, K. ; Husnain, M.I.U. ; Hameed Khaliq, I.
Tropical Biomedicine 2019;36(3):664-676
The extent of the economic burden of malaria and its imposed mechanisms are
both relevant to public policy. This paper investigates the economic burden of malaria and
household behaviour in relation to the treatment and prevention of the illness in Pakistan.
In this regard, data were collected from a randomly selected sample of 360 households
using structured questionnaires. The survey results indicate that 23.4% of household
members contracted malaria during the three-month reference period. The average per
person cost of malaria is estimated at 3116 Pakistani rupees (PKR) (USD 32). The estimated
cost of the illness was found to be equivalent to, on average, 6.7% of monthly household
income. Although high-income households face a higher financial burden due to better
preventive and mitigation measures, the negative consequences hit low-income households
harder due to liquidity constraints and poor access to effective treatment. We recommend
that malaria control policies be integrated into development and poverty reduction programs.
7. Surveillance of Chikungunya virus activity in some North-eastern states of India
Prafulla DUTTA ; Siraj A. KHAN ; Sumi CHETRY ; Abdul M. KHAN ; Anil C. PHUKAN ; Sarat HAZARIKA ; Naba K. HAZARIKA ; Harpreet KAUR
Asian Pacific Journal of Tropical Medicine 2019;12(1):1-7
Objective: To detect the prevalence pattern of Chikungunya virus in three states of Northeast India. Methods: A total of 1 510 samples were collected from different private and government hospitals of Assam, Arunachal Pradesh and Meghalaya. Serum was tested for the presence of IgM antibodies against Chikungunya virus followed by RT-PCR for amplification of Chikungunya E1 gene region using specific primers. Results: Overall, 11.83% (172/1 454) clinical samples were positive by MAC-ELISA and/or RT-PCR assay. Asymptomatic infection was seen in 17.86%. Males were more affected than females and age group 16-30 years was mostly affected. Fever (100.00%) was the primary symptom followed by headache (72.03%) and arthralgia (41.53%). Only 118 Chikungunya positive cases could be traced, of which 25.42% complained about sequelae of infection. In entomological investigation, Aedes aegypti was more predominant (92.10%) than Aedes albopictus (7.90%). No mosquito pools could be incriminated for Chikungunya virus. Conclusions: In this study, Chikungunya was observed to be prevalent in Assam, Arunachal Pradesh and Meghalaya. Though Chikungunya is a self-limiting infection, increasing morbidity by CHIKV infection is affecting social and economic status of individual. Thus, a community empowerment to effectively control mosquito population by employing different mosquito control measures along with personal protection is mandatory to tackle future outbreak of the disease.
8.Road dust and its effect on human health: a literature review
Epidemiology and Health 2018;40(1):2018013-
The purpose of this study was to determine the effects of road dust on human health. A PubMed search was used to extract references that included the words “road dust” and “health” or “fugitive dust” and “health” in the title or abstract. A total of 46 references were extracted and selected for review after the primary screening of 949 articles. The respiratory system was found to be the most affected system in the human body. Lead, platinum-group elements (platinum, rhodium, and bohrium), aluminum, zinc, vanadium, and polycyclic aromatic hydrocarbons were the components of road dust that were most frequently referenced in the articles reviewed. Road dust was found to have harmful effects on the human body, especially on the respiratory system. To determine the complex mechanism of action of various components of road dust on the human body and the results thereof, the authors recommend a further meta-analysis and extensive risk-assessment research into the health impacts of dust exposure.
Aluminum
;
Dust
;
Human Body
;
Humans
;
Mass Screening
;
Particulate Matter
;
Polycyclic Hydrocarbons, Aromatic
;
Respiratory System
;
Review Literature as Topic
;
Rhodium
;
Risk Assessment
;
Vanadium
;
Zinc
9.Road dust and its effect on human health: a literature review
Epidemiology and Health 2018;40():e2018013-
The purpose of this study was to determine the effects of road dust on human health. A PubMed search was used to extract references that included the words “road dust†and “health†or “fugitive dust†and “health†in the title or abstract. A total of 46 references were extracted and selected for review after the primary screening of 949 articles. The respiratory system was found to be the most affected system in the human body. Lead, platinum-group elements (platinum, rhodium, and bohrium), aluminum, zinc, vanadium, and polycyclic aromatic hydrocarbons were the components of road dust that were most frequently referenced in the articles reviewed. Road dust was found to have harmful effects on the human body, especially on the respiratory system. To determine the complex mechanism of action of various components of road dust on the human body and the results thereof, the authors recommend a further meta-analysis and extensive risk-assessment research into the health impacts of dust exposure.
10.Development of polyvinylpyrrolidone/paclitaxel self-assemblies for breast cancer.
Pallabita CHOWDHURY ; Prashanth K B NAGESH ; Sheema KHAN ; Bilal B HAFEEZ ; Subhash C CHAUHAN ; Meena JAGGI ; Murali M YALLAPU
Acta Pharmaceutica Sinica B 2018;8(4):602-614
The goal of this investigation was to develop and demonstrate a polymer/paclitaxel self-assembly (PTX-SA) formulation. Polymer/PTX-SAs were screened based on smaller size of formulation using dynamic light scattering analysis. Additionally, fluorescence microscopy and flow cytometry studies exhibited that polyvinylpyrrolidone (PVP)-based PTX-SAs (PVP/PTX-SAs) had superior cellular internalization capability in MCF7 and MDA-MB-231 breast cancer cells. The optimized PVP/PTX-SAs exhibited less toxicity to human red blood cells indicating a suitable formulation for reducing systemic toxicity. The formation of PVP and PTX self-assemblies was confirmed using fluorescence quenching and transmission electron microscopy which indicated that the PVP/PTX-SAs were spherical in shape with an average size range of 53.81 nm as detected by transmission electron microscopy (TEM). FTIR spectral analysis demonstrates incorporation of polymer and paclitaxel functional groups in PVP/PTX-SAs. Both proliferation (MTS) and clonogenic (colony formation) assays were used to validate superior anticancer activity of PVP/PTX-SAs in breast cancer cells over paclitaxel. Such superior anticancer activity was also demonstrated by downregulation of the expression of pro-survival protein (Bcl-xL), upregulation of apoptosis-associated proteins (Bid, Bax, cleaved caspase 7, and cleaved PARP) and -tubulin stabilization. These results support the hypothesis that PVP/PTX-SAs improved paclitaxel delivery to cancer cells.


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