scholarly journals Acute Toxicity Test Of The Green Viper Snake (Trimeresurus albolabris), Macroscopic Description Of The Kidney And Liver Of Mice (Mus musculus)

2021 ◽  
Vol 10 (2) ◽  
pp. 59
Author(s):  
Moch. Rizky Darmawan ◽  
Dadik Rahardjo ◽  
Wiwiek Tyasningsih ◽  
Rochmah Kurnijasanti ◽  
Djoko Legowo ◽  
...  
Keyword(s):  
Surface Structure ◽  
Mus Musculus ◽  
Clinical Symptoms ◽  
Lethal Dose ◽  
Macroscopic Description ◽  
Movement Activity ◽  
Macroscopic Appearance ◽  
Venomous Snake ◽  
Color Changes ◽  
Ld50 Value

According to WHO (2010), the Trimeresurus albolabris snake is a venomous snake with a high number of bite cases in Indonesia. Information on the character and level of toxicity of snake venom in Indonesia, including Trimeresurus spp. snakes, is still minimal. This study aims to determine the LD50 value (lethal dose 50), clinical symptoms, and to determine the macroscopic appearance of the liver and kidneys of mice (Mus musculus) after being injected by a the white-lipped pit viper (Trimeresurus albolabris) venom. The LD50 value of Trimeresurus albolabris venom injected subcutaneously into mice was 5,09 mg/kgBW. Clinical symptoms that appear increased movement activity, increased respiratory rate, lethargy, decreased activity, and reduced grooming. Macroscopic appearance of the liver that looks abnormal is found (1) color changes in the form of pale, pale yellowish, and red spots (petechiae). (2) changes in surface structure found only one liver that is not flat. (3) changes in consistency in the form of brittle easily. In the kidney that looks abnormal, found (1) changes in color in the form of pale. (2) changes in surface structure were only found in one kidney in the form of nodules. (3) changes in consistency in the form of brittle easily and soft.

Keratinizing squamous metaplasia of the bladder: Our experience and current approaches

2018 ◽  
Vol 87 (2) ◽  
pp. 97-100 ◽  
Author(s):  
Andrea Benelli ◽  
Virginia Varca ◽  
Chiara Vaccaro ◽  
Sonia Guzzo ◽  
Marta Nicola ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Clinical Symptoms ◽  
Squamous Metaplasia ◽  
Squamous Carcinoma ◽  
Intravesical Instillation ◽  
Therapeutic Management ◽  
Bladder Mucosa ◽  
Macroscopic Appearance ◽  
Multiple Biopsies ◽  
Starting Point

Introduction: Bladder mucosa is anatomically covered by urothelial epithelium. The replacement of the urothelium with stratified squamous cells is defined as squamous metaplasia which can be keratinizing or non-keratinizing. Clinically, it is also known as leukoplakia or keratinizing cystitis of the bladder. Although several etiologic factors have been proposed such as chronic inflammation, irritative stimuli and infection, its pathogenesis is not clearly understood. The natural history of squamous metaplasia and clinical treatment are controversial. Many authors consider squamous metaplasia as a premalignant lesion, so it is fundamental to find an effective treatment to reduce the risk of developing bladder squamous carcinoma. Case description: We report our management of a 58-year-old man with histological evidence of keratinizing squamous metaplasia and severe lower urinary tract symptoms. After repeated transurethral resections, the patient was treated with intravesical instillation of hyaluronic acid showing the regression of the lesion with an improvement of macroscopic appearance followed by the resolution of clinical symptoms. Conclusion: The therapeutic management of keratinizing squamous metaplasia is controversial, and currently no effective medical therapy is available for its treatment. Actually, patients undergo transurethral resections and a multidisciplinary approach is required to avoid cystectomy. Annual cystoscopy with multiple biopsies should be performed to determine the presence of dysplasia. Moreover, the therapeutic treatment with hyaluronic acid instillations could be the starting point and the gold standard in the follow-up of our patient. However, at present, further studies are required to formulate an adequate policy for therapeutic management of this unusual lesion of the bladder mucosa.

scholarly journals Sensitivity of The Stripe-Faced Dunnart, Sminthopsis Macroura (Gould 1845), To The Phenyl Pyrazole Insecticide, Fipronil, Toxicological Signs And Implications For Pesticide Risk Assessments In Australia

2021 ◽  
Author(s):  
Paul Story ◽  
Lyn A Hinds ◽  
Steve Henry ◽  
Andrew C. Warden ◽  
Greg Dojchinov
Keyword(s):  
Lethal Dose ◽  
Risk Assessments ◽  
Eutherian Mammal ◽  
Oral Toxicity ◽  
Median Lethal Dose ◽  
Agricultural Pesticides ◽  
Sminthopsis Macroura ◽  
The Difference ◽  
Ld50 Value ◽  
Female Responses

Abstract A lack of toxicity data quantifying responses of Australian native mammals to agricultural pesticides prompted an investigation into the sensitivity of the stripe-faced dunnart, Sminthopsis macroura (Gould 1845) to the insecticide, fipronil (5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-trifluoromethylsulfinyl pyrazole, CAS No. 120068-37-3). Using the Up-And-Down method for determining acute oral toxicity in mammals, derived by the Organisation for Economic Cooperation and Development (OECD), median lethal dose estimates of 990 mg kg− 1 (95% confidence interval (CI) = 580.7–4770.0 mg kg− 1) and 270.4 mg kg− 1 (95% CI = 0.0 - >20000.0 mg kg− 1) were resolved for male and female S. macroura respectively. The difference between median lethal dose estimates for males and females may have been influenced by the increased age of two female dunnarts. Further modelling of female responses to fipronil doses used the following assumptions: (a) death at 2000 mg kg− 1, (b) survival at 500 mg kg− 1 and (c) a differential response (both survival and death) at 990 mg kg− 1. This modelling revealed median lethal dose estimates for female S. macroura of 669.1 mg kg− 1 (95% CI = 550–990 mg kg− 1; assuming death at 990 mg kg− 1) and 990 mg kg− 1 (95% CI = 544.7–1470 mg kg− 1; assuming survival at 990 mg kg− 1). These median lethal dose estimates are 3–10-fold higher than the only available LD50 value for a similarly sized eutherian mammal, Mus musculus (L. 1758; 94 mg kg− 1) and that available for Rattus norvegicus (Birkenhout 1769; 97 mg kg− 1). Implications for pesticide risk assessments in Australia are discussed.

scholarly journals Aeromonas hydrophila, an Emerging Causative Agent of Freshwater-Farmed Whiteleg shrimp Litopenaeus vannamei

2019 ◽  
Vol 7 (10) ◽  
pp. 450 ◽  
Author(s):  
Huihua Zhou ◽  
Chunlei Gai ◽  
Guifang Ye ◽  
Jian An ◽  
Kai Liu ◽  
...  
Keyword(s):  
Causative Agent ◽  
Aeromonas Hydrophila ◽  
Inhibitory Concentration ◽  
Lethal Dose ◽  
Bacterial Pathogen ◽  
Inhibition Zone ◽  
Punica Granatum ◽  
Veterinary Antibiotics ◽  
Whiteleg Shrimp ◽  
Ld50 Value

Aeromonas hydrophila is a well-known bacterial pathogen associated with mass mortalities in aquaculture. Yet, few reports are available on whiteleg shrimp-pathogenic A. hydrophila. In the present study, a virulent isolate WS05 was confirmed as a causative agent of diseased freshwater-cultured whiteleg shrimp and showed a mean lethal dose (LD50) value of 4.8 × 104 CFU mL−1. It was identified phenotypically and molecularly as an A. hydrophila strain, and exhibited susceptibility to several veterinary antibiotics extensively used in aquaculture, including cotrimoxazole, doxycycline, florfenicol, neomycin, and tetracycline. In view of the strongest inhibition zone of florfenicol against isolate WS05, the synergistic effect of the combinations of florfenicol and herb extracts was further evaluated, and the result indicated that Punica granatum extract was a potential synergist of florfenicol against isolate WS05 and the fractional inhibitory concentration index (FICI) for the florfenicol-P. granatum extract was calculated as 0.31. When combined with 7.81 mg mL−1 P. granatum extract, the minimum inhibitory concentration (MIC) of florfenicol against isolate WS05 was reduced from 0.50 to 0.03 mg L−1, and its activity against isolate WS05 was also enhanced with a significant reduction of ≥3.61 log in cell density after 24 h of treatment compared with that in the single drug treatment. In addition, the protective effect was potentiated by the combination of florfenicol and P. granatum extract, with a cumulative mortality of 36.66% (p < 0.05) and 33.33% (p < 0.05) lower than that in the single treatment with florfenicol and P. granatum extract after the challenge with isolate WS05 for seven days. As far as we know, this is the first study to describe whiteleg shrimp-pathogenic A. hydrophila and suggest P. granatum extract as a potential synergist of florfenicol against the A. hydrophila pathogen.

scholarly journals ACUTE ORAL TOXICITY STUDY OF ETHANOLIC EXTRACT OF ACTINOSCIRPUS GROSSUS (L.F.) GOETGH. AND D.A. SIMPSON

2018 ◽  
Vol 11 (7) ◽  
pp. 321
Author(s):  
Savin Chanthala Ganapathi ◽  
Rajendra Holla ◽  
Shivaraja Shankara Ym ◽  
Ravi Mundugaru
Keyword(s):  
Body Weight ◽  
Lethal Dose ◽  
Ethanolic Extract ◽  
Female Rats ◽  
Test Substance ◽  
Acute Oral Toxicity ◽  
Oral Toxicity ◽  
Healthy Female ◽  
Ld50 Value ◽  
Toxic Potential

Objective: To study the acute oral toxicity of ethanolic extract of Actinoscirpus grossus (L.f.) Goetgh. and D.A. Simpson in Wistar albino rats.Methods: Ethanolic extract of the plant was assessed for single dose acute toxicity by employing Organisation for Economic Co-Operation and Development(OECD) guidelines 425 using Acute Oral Toxicity(AOT) software. The dosed (up or down as per the requirement) rats were observed for 14 days for general appearance, behavior, mortality, and necropsy. A total of 5 healthy female rats of body weight 225±25 g were used.Results: The test substance did not produce any mortality up to the dose of 2000 mg/kg per oral.Conclusion: Test substance is without any toxic potential even at the dose of 2000 mg/kg in animals and the Lethal Dose (LD50) value of A. grossus (L.f.) Goetgh. and D.A. Simpson was found to be more than 2000 mg/kg body weight.

scholarly journals Insecticidal and Enzyme Inhibitory Activities of Isothiocyanates against Red Imported Fire Ants, Solenopsis invicta

Biomolecules ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 716 ◽  
Author(s):  
Yuzhe Du ◽  
Michael J. Grodowitz ◽  
Jian Chen
Keyword(s):  
Solenopsis Invicta ◽  
Lethal Dose ◽  
Allyl Isothiocyanate ◽  
Fire Ants ◽  
Contact Toxicity ◽  
Red Imported Fire Ant ◽  
Ic50 Values ◽  
Ld50 Value ◽  
Fumigation Toxicity

Contact and fumigation toxicity of four isothiocyanates (ITCs), including allyl isothiocyanate (AITC), 3-butenyl isothiocyanate (3BITC), 3-(methylthio) propyl isothiocyanate (3MPITC) and 2-phenylethyl isothiocyanate (2PEITC), were evaluated against the red imported fire ant worker, Solenopsis invicta Buren. 2PEITC and 3MPITC exhibited strong contact toxicity. The median lethal dose (LD50)value of AITC, 2PEITC and 3MPITC were 7.99, 2.36 and 2.09 µg/ant respectively. In addition, AITC and 3MPITC also showed strong fumigation toxicity but not 2PEITC. The median lethal concentration (LC50) values of AITC and 3MPITC were 32.49 and 57.6 µg/L, respectively. In contrast, 3BITC did not exhibit any contact and fumigation toxicity even at 100 μg/μL. Esterase (EST), glutathione S-transferase (GST) and acetylcholinesterase (AChE)-inhibiting activities were assessed for three ITCs in S. invicta workers. All three ITCs inhibited both EST and GST activities but not AChE. The in vitro half maximal inhibitory concentration (IC50)values of AITC, 2PEITC and 3MPITC for GST were 3.32, 0.61 and 0.66 µg/µL, respectively. These results suggested that naturally occurring ITCs might be potentially useful for developing fire ants control products.

scholarly journals UJI TOKSISITAS AKUT EKSTRAK ETANOL DAUN MALAKA (Phyllantus emblica) TERHADAP MENCIT (Mus musculus). (Acute Toxicity Test of Ethanolic Extract of Malaka (Phyllantus emblica) Leaves on Mice (Mus musculus))

2016 ◽  
Vol 10 (2) ◽  
pp. 192-194
Author(s):  
T. Armansyah TR ◽  
Sudi Indriany ◽  
Amalia Sutriana ◽  
Rosmaidar Rosmaidar ◽  
Nuzul Asmilia ◽  
...  
Keyword(s):  
Body Weight ◽  
Acute Toxicity ◽  
Mus Musculus ◽  
Lethal Dose ◽  
Toxic Substance ◽  
Ethanolic Extract ◽  
Slight Reduction ◽  
Oral Gavage ◽  
Toxicity Symptom ◽  
Observation Period

ABSTRACT The aim of this research was to asses the acute toxicity of ethanolic extract of malaka leaves using lethal dose 50 (LD50) on mice (Mus musculus). Twenty male mice weighing between 20-30 g were randomly divided into 4 groups (group K1-K4) of 5 mice each. All mice in group K1, K2, K3, and K4 were administered ethanolic extract of malaka leaves with the dose of 2, 4, 8, and 16 g/kg bw, respectively. Single dose of ethanolic extract of malaka leaves were given by oral gavage prior to clinical observation . The observation period was 14 days post administration, for sign of toxicity symptom, weight loss, and mortality. The result showed that no mortality was observed in the experimental animals during this study. Slight reduction of body weight was observed in group K2, K3, and K4, and no toxicity sign was found during fourteen days of observation. The LD50 of ethanolic extract of malaka leaves was higher than 16 g/kg body weight, thus, the substance was practically non toxic substance.

scholarly journals Pathogenicity of H5N8 High Pathogenicity Avian Influenza Virus in Chickens and Ducks from South Korea in 2020–2021

Viruses ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1903
Author(s):  
Min-Ji Park ◽  
Ra Mi Cha ◽  
Soo-Jeong Kye ◽  
Yu-Na Lee ◽  
Na-Yeong Kim ◽  
...  
Keyword(s):  
Avian Influenza ◽  
South Korea ◽  
Clinical Symptoms ◽  
Transmission Rate ◽  
Lethal Dose ◽  
Winter Season ◽  
Virus Shedding ◽  
Viral Shedding ◽  
Death Time ◽  
High Pathogenicity

During the 2020–2021 winter season, an outbreak of clade 2.3.4.4b H5N8 high pathogenicity avian influenza (HPAI) virus occurred in South Korea. Here, we evaluated the pathogenicity and transmissibility of A/mandarin duck/Korea/H242/2020 (H5N8) (H242/20(H5N8)) first isolated from this outbreak in specific pathogen-free (SPF) chickens and commercial ducks in comparison with those of A/duck/Korea/HD1/2017(H5N6) (HD1/17(H5N6)) from a previous HPAI outbreak in 2017–2018. In chickens, the 50% chicken lethal dose and mean death time of H242/20(H5N8) group were 104.5 EID50 and 4.3 days, respectively, which indicate less virulent than those of HD1/17(H5N6) (103.6 EID50 and 2.2 days). Whereas, chickens inoculated with H242/20(H5N8) survived longer and had a higher titer of viral shedding than those inoculated with HD1/17(H5N6), which may increase the risk of viral contamination on farms. All ducks infected with either HPAI virus survived without clinical symptoms. In addition, they exhibited a longer virus shedding period and a higher transmission rate, indicating that ducks may play an important role as a silent carrier of both HPAI viruses. These results suggest that the pathogenic characteristics of HPAI viruses in chickens and ducks need to be considered to effectively control HPAI outbreaks in the field.

scholarly journals Pengujian Toksisitas Akut LD50 Infusa Benalu Teh (Scurrula sp.) dengan Menggunakan Mencit (Mus musculus)

2021 ◽  
Vol 9 (1) ◽  
pp. 53-63
Author(s):  
Amalina Qurratu Ayun ◽  
Didah Nur Faridah ◽  
Nancy Dewi Yuliana ◽  
Andriyanto Andriyanto
Keyword(s):  
Mus Musculus ◽  
Lethal Dose

Penelitian bertujuan untuk mengevaluasi efek pemberian infusa benalu teh (Scurrula sp.) terhadap toksisitas akut lethal dose 50 (LD50) dan mengkaji perubahan histopatologi hati, ginjal, dan limpa mencit. Sebanyak 30 ekor mencit jantan dan 30 ekor mencit betina dibagi menjadi enam kelompok dan lima ulangan. Mencit percobaan yang tidak diberi infusa benalu teh dikelompokkan sebagai kontrol, sedangkan yang diberi infusa benalu teh dosis 1, 5, 10, 15, dan 20 g/kg BB dikelompokkan sebagai perlakuan. Pemberian infusa benalu teh dilakukan satu kali pada awal penelitian secara oral kemudian mencit diamati gejala klinis, mortalitas, dan bobot badan. Pada akhir penelitian (hari ke-14), mencit percobaan dikorbankan untuk dievaluasi secara histopatologi. Hasil penelitian menunjukkan bahwa pemberian infusa benalu teh pada mencit sampai dengan dosis 20 g/kg BB tidak menimbulkan kematian ataupun gejala klinis spesifik serta pertumbuhan normal. Gambaran histopatologi menunjukkan bahwa pemberian infusa benalu teh pada semua mencit percobaan sampai dengan dosis 20 g/kg BB tidak ditemukan adanya degenerasi maupun nekrosis pada organ hati, ginjal, maupun limpa. Kesimpulan dari penelitian ini menunjukkan bahwa infusa benalu teh dikelompokkan dalam sediaan praktis tidak toksik dan tidak menimbulkan kelainan pada organ hati, ginjal, maupun limpa.

scholarly journals A Novel, Killed-Virus Nasal Vaccinia Virus Vaccine

2007 ◽  
Vol 15 (2) ◽  
pp. 348-358 ◽  
Author(s):  
Anna U. Bielinska ◽  
Alexander A. Chepurnov ◽  
Jeffrey J. Landers ◽  
Katarzyna W. Janczak ◽  
Tatiana S. Chepurnova ◽  
...  
Keyword(s):  
Vaccinia Virus ◽  
Neutralizing Antibodies ◽  
Clinical Symptoms ◽  
Lethal Dose ◽  
Minimal Risk ◽  
Live Virus ◽  
Virus Challenge ◽  
Lethal Infection ◽  
Nasal Vaccination ◽  
Complete Disruption

ABSTRACT Live-virus vaccines for smallpox are effective but have risks that are no longer acceptable for routine use in populations at minimal risk of infection. We have developed a mucosal, killed-vaccinia virus (VV) vaccine based on antimicrobial nanoemulsion (NE) of soybean oil and detergent. Incubation of VV with 10% NE for at least 60 min causes the complete disruption and inactivation of VV. Simple mixtures of NE and VV (Western Reserve serotype) (VV/NE) applied to the nares of mice resulted in both systemic and mucosal anti-VV immunity, virus-neutralizing antibodies, and Th1-biased cellular responses. Nasal vaccination with VV/NE vaccine produced protection against lethal infection equal to vaccination by scarification, with 100% survival after challenge with 77 times the 50% lethal dose of live VV. However, animals protected with VV/NE immunization did after virus challenge have clinical symptoms more extensive than animals vaccinated by scarification. VV/NE-based vaccines are highly immunogenic and induce protective mucosal and systemic immunity without the need for an inflammatory adjuvant or infection with live virus.

scholarly journals LD5o of the bacteria Aeromonas hydrophila to matrinxã, Brycon amazonicus

2011 ◽  
Vol 41 (2) ◽  
pp. 321-326 ◽  
Author(s):  
Sarah Ragonha de Oliveira ◽  
Rondon Tatsuta Yamane Baptista de Souza ◽  
Elenice Martins Brasil ◽  
Jaqueline Inês Alves de Andrade ◽  
Érica da Silva Santiago Nunes ◽  
...  
Keyword(s):  
Water Quality ◽  
Aeromonas Hydrophila ◽  
Saline Solution ◽  
Lethal Dose ◽  
Fish Mortality ◽  
Fish Health ◽  
Challenge Tests ◽  
And Performance ◽  
Ld50 Value ◽  
Bacterial Concentrations

In order to determine the lethal dose (96-h LD50) of the bacteria Aeromonas hydrophila to matrinxã, Brycon amazonicus, to be applied in challenge tests, 90 fish (63.23 ± 6.39 g) were divided into five treatments, with different bacterial solutions: T1 - Control (0.9% NaCl saline solution); T2 (4 x 10(11) cells/ mL); T3 (5 x 10(11) cells/ mL); T4 (1.36 x 10(12) cells/ mL) and T5 (3.06 x 10(12) cells/ mL). Fish were previously anesthetized with benzocaine (60 mg L-1), inoculated in the peritoneal cavity with the bacterial suspensions and then distributed into fifteen 80-L test chambers, where the water variables were monitored and fish mortality was observed. The experiment was randomly designed in three replicates and the 96-h LD50 was estimated according to the trimmed Spearman-Karber method. Water quality variables remained within adequate ranges for fish health and performance. Fish mortality rate increased with the bacterial concentrations of A. hydrophila (T1 = 0%; T2 = 16.66%; T3 = 44.44%; T4 = 72.22% and T5 = 100%), and the first mortalities were observed after 57 h, although the signs of the bacterial infection were already observed 24 h after the inoculation. The results indicate that the 96-h LD50 value of A. hydrophila to matrinxã is 6.66 x 10(11) cells/ mL.

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