scholarly journals Application of research in the field of forensic entomology for determining the time of death in dogs

2018 ◽  
Vol 74 (1) ◽  
pp. 33-38
Author(s):  
PIOTR LISTOS ◽  
MAGDALENA GRYZIŃSKA ◽  
JUSTYNA BATKOWSKA ◽  
MAŁGORZATA DYLEWSKA ◽  
KATARZYNA CZEPIEL-MIL

Precisely determined time of death is one of the most important pieces of information obtained during a post-mortem investigation. There are several traditional methods for determining time of death, the most important of which are evaluation of early post-mortem changes, such as the change in body temperature. The study was aimed at identifying insects collected from the body and establishing the time of death by observing the developmental cycle of the indicator species Calliphora vicina. The material for the main experiment was the carcass of a dog. The length of the developmental cycles of insects depends on ambient conditions, so studies should take as many criteria as possible into account. Succession of arthropods, as well as the species composition and indicator insects of particular stages of decomposition, is very similar in human and animal carcasses. The results obtained were considered with respect to the time that had passed since the death of the animal. Experiments on dog carcasses may in the future contribute to the development of research enabling determination of the time of death of animals, which is a subject of increasing interest in forensic veterinary medicine....

2008 ◽  
Vol 62 (3-4) ◽  
pp. 223-231
Author(s):  
Jelena Aleksic ◽  
Slavoljub Jovic

Entomological evidence is legal evidence in the form of insects or related artropodes, and a field of their study in the aim of medicocriminal applications and veterinary-medical forensic cases is forensic entomology. The most obvious and widely present fauna on the animal and human corpse in early stages of the decomposition process are insect larvae that use the corps as an important food source. The insects found on the corpse represent a significant source of information for determining the time of death, which is an evaluation of the post-morted interval. Additionally, by comparing fauna around the body with fauna found on the body one can obtain information if the corpse was moved after death. Often, insects found on the body point out that infestation by larvae started before death. That implicates animal abuse and defines its duration. Based on these elements, a forensic doctor can deduce which level of abuse is in question. Entomology is an expanding field and the more cases are being shown and the more researchers are being taught how to use insects as a way of proving responsibility, the more it will develop. It is becoming more common for entomological evidence to be case-breaking in the determination of post mortem intervals, in both early and late decomposition phase.


2021 ◽  
Vol 77 (07) ◽  
pp. 6546-2021
Author(s):  
KINGA PANASIUK-FLAK ◽  
MAŁGORZATA GRELA ◽  
PIOTR LISTOS

To determine the time of death in the early post-mortem period, i.e. up to a few hours or a few days, methods involving measurement of body temperature and observations of supravital reactions are used. One of the most promising methods is measurement of the reactivity of the pupil under the influence of substances such as those used in this study, atropine and pilocarpine. The research material was two groups of dogs, one with body weight over 40 kg and another under 10 kg, whose time of death was known. At 30, 60, 90, 120 and 180 minutes post-mortem, atropine or pilocarpine drops were placed in the conjunctival sac and the change in pupil diameter was measured. The study clearly showed that the method is useful in forensic estimation of the time of death of an animal. In order to verify the reliability of the method, there is a need for further study.


Author(s):  
Richard D.W. Hain ◽  
Satbir Singh Jassal

In helping children to have a ‘good death’, it is vitally important to understand the practical issues around death. Parents often have little or no understanding of this and will look to the health-care professional for guidance. When done well, the parents are left unaware of the complexities involved. However, when done badly, the parents can be left feeling very upset. Predicting the time of death for a child is notoriously difficult, and this issue is addressed by this chapter. A detailed overview of practicalities around the time of death is provided, with information on the correct procedure before death, certifying and registering a death, cremation, organ and tissue donation, and transporting and looking after the body. Further practicalities, including the post-mortem, the role of the coroner, and the role of the Child Death Overview Panel, are also covered.


2017 ◽  
Vol 295 ◽  
pp. 56-63
Author(s):  
Joanna Stojak ◽  

Entomotoxicology allows the estimation of the post-mortem interval and the determination of the cause of death in cases in which the corpse has decomposed and the tissues necessary for toxicological analysis are no longer available. Obtaining information about toxic substances potentially present in the body is possible by isolation of larvae and pupae of true flies (Diptera) and/or adult forms of, e.g., beetles (Coleoptera) present on or near the corpse. This article was intended to summarize the current knowledge in the field of entomotoxicology, including examples from the literature, and to present the impact of selected toxic substances and medicines on the development of necrophagous larvae of insects.


2020 ◽  
Vol 76 (03) ◽  
pp. 6366-2020
Author(s):  
KATARZYNA CZEPIEL-MIL ◽  
ROBERT STRYJECKI ◽  
PIOTR LISTOS ◽  
DANUTA KOWALCZYK-PECKA ◽  
KAMIL WYDRA ◽  
...  

Forensic entomology frequently assists forensic medicine in legal investigations. It makes it possible to estimate the time of death when a cadaver is recovered at a relatively advanced stage of decomposition. In criminalistics practice, unburied bodies are found the most commonly, and therefore the fauna of these cadavers is the best investigated. The aim of this study was to collect a succession of insects and other invertebrates occurring on an unburied corpse. The experiment was conducted on the carcass of a cat euthanized due to an advanced cancer process. The carcass was colonized by three phyla of animals: Annelidae, Mollusca, and Arthropoda. They belonged to 7 classes and 10 orders. The most diverse were Arthropoda. They were classified into 5 classes: Insecta, Diplopoda, Malacostraca, Entognata, and Arachnida, and into 8 orders: Julida, Isopoda, Collembola, Diptera, Coleoptera, Hemiptera, Araneae, and Acari. The fly species Calliphora vicina from the family Calliphoridae is of particular interest among the insects collected because it is one of the fundamental indicator species whose life cycle makes it possible to determine an approximate time of death. During the study it was noted that arthropods occurred in a certain pattern of succession, predictable in forensic entomology. The first group was Calliphora vicina (Calliphoridae, Diptera), which laid eggs. The next (second) group consisted of first-instar C. vicina larvae and insects feeding on these larvae, such as Philonthus tenuicornis (Staphylinidae, Coleoptera). The first stage of succession was the appearance of eggs of C. vicina. The second phase was the appearance of adult flies other than Calliphoridae and of accidental species, as well as beetles (e.g. Philonthus tenuicornis, Staphylinidae, Coleoptera) feeding on larvae of C. vicina. The third phase of succession was the appearance of all larvae stages of C. vicina that continued and finished their life cycle.


Author(s):  
V. F. Bezhenar ◽  
L. A. Ivanova ◽  
N. V. Belitchenko

Antenatal death is the cessation of fetal heart contractions during pregnancy for more than 22 weeks prior to the onset of labor. Objective: to evaluate the capabilities of the method of ultrasound in antenatal fetal death. Tasks of ultrasound in the presence of a dead fetus: a statement of his death; determining the position, presentation, size, estimated fetal weight and gestational age; detection of congenital malformations (CM) and possible causes of death; clarification of the statute of limitations of death. We have analyzed 126 standard ultrasound protocols of pregnant women with antenatal fetal death. Ascertaining the cessation of heart contractions and determining the location of the fetus present no difficulties for the ultrasound doctor. The assessment of the conformity of the size of the fetus to the gestational period during antenatal death is better determined by measuring the diaphysis of the long bones. Head sizes are used only when it is possible to clearly assess the typical structures of a biparietal slice. The determination of the estimated mass of the fetus is difficult due to autolytic changes and, usually, lack of water. The diagnosis of CM, first established after ascertaining antenatal fetal death, should cause the doctor to doubt that it is in front of us — a developmental defect, as a possible cause of intrauterine death or post-mortem changes that depend on previous intravital changes, cause and duration of death. The article describes the dynamics of the appearance of post-mortem changes. Conclusions: with antenatal fetal death, it is impractical to determine the expected mass of the fetus, it is preferable to estimate the period of probable cessation of development from the measurement of long tubular bones; during an ultrasound of the deceased fetus, it is often impossible to reliably determine the presence/absence of CM and the exact time of death; change in the amount of amniotic fluid is not a reliable diagnostic criterion for the duration of death.


1899 ◽  
Vol 45 (191) ◽  
pp. 758-760
Author(s):  
E. B. Whitcombe

The patient, thirty-nine years of age, was admitted into Birmingham Asylum in February, 1898. He was a porter, married, in fairly robust condition, and was a typical example, both mentally and physically, of general paralysis of the insane of somewhat short duration. He was stated to have been steady, of temperate habits, and had been in the army. For twelve years he served in India. No history of fevers or other illness. The disease progressed without any special features until January 14th of this year, when he was noticed to be worse; his breathing was a little rapid, and in consequence he was sent to the infirmary ward and was examined thoroughly by the assistant medical officer, who found nothing specially interesting, but ordered him to be put to bed and kept warm. This was about 3 o'clock in the afternoon. At 7 o'clock the same evening I was asked to see the patient (he had been examined at 5 o'clock by the nurse). I found the left leg from thigh to toe was double the size of the other leg, and nearly the whole surface of the leg was perfectly black, and there were numerous large bullæ the size of one's fist in different places along the leg. There was no special line of demarcation. At first sight it looked like an extreme case of local purpura, but after a careful examination I came to the conclusion that putrefaction had actually set in, and that the man was dying, and death took place an hour after I saw him. The most extraordinary part of this case occurred afterwards. I am accustomed to go and see a body before giving my certificate to the coroner. I saw this man between 10 and 11 on Sunday morning, he having died at 8 p.m. on Saturday. The body was double the former size; it was more like the body of a negro, the whole surface being in a black condition, and the bullæ had increased on the other parts of the body. The scrotum was distended to the size of a man's head, and the penis swelled and distorted. The case was the more extraordinary as the highest temperature recorded locally at the time was 52·8°, and the lowest 34°. I personally saw the coroner, and together we went through numerous works on jurisprudence, but we could find nothing to give us any idea as to the cause of this condition, and he very kindly and in scientific interests ordered an inquest. He sent Dr. Simon, Professor of Medical Jurisprudence in Mason College, to make the post-mortem examination. The results were practically nil, the whole body internally and externally being putrefied. The cause of death was very naturally put down to general paralysis, but as to any cause for this extremely rapid putrefaction we could arrive at no conclusion. The case is one of very great interest. I believe that the first idea that the nurse had in the infirmary was that this man must have been injured. Now there was the usual considerable difference between the appearance of an injury and this condition, which looked like purpura; but besides this the difficulty that occurred to my mind was as to the fixing of the time of death. Here was a body presenting the appearances which are usually recognised as those of three or four weeks' duration, and these had happened certainly within sixteen hours. From the point of view of jurisprudence it occurred to me that a murder might be committed, that the body might present these appearances, and that it would be a most serious matter for a medical man to give an opinion as to the time of death. We know that in hot countries this condition does occur, but we were in the middle of winter, and the condition arose from, so far as we could judge, no special cause whatever. There was some atheroma of the arteries, but otherwise we could distinguish nothing of importance at the post-mortem. It is to be regretted that no bacteriological examination was made.


2021 ◽  
Vol 77 (05) ◽  
pp. 253-257
Author(s):  
PIOTR LISTOS ◽  
MAGDALENA GRYZIŃSKA ◽  
KINGA PANASIUK-FLAK ◽  
MARZANNA CIESIELKA ◽  
GRZEGORZ TERESIŃSKI

Precise determination of the time of death of a human being or animal is extremely important for investigations by law enforcement agencies. The aim of the study was to use a thermal imaging camera for imaging of the cooling of dog carcasses in controlled conditions, as a practical application of thermal imaging in veterinary forensics for the purpose of establishing the time of death of an animal, as well as to compare the usefulness of this method with that of the currently used Henssge nomogram. A thermographic technique exploiting infrared radiation was used in the study. The research material was 10 dog carcasses (5 female and 5 male) aged 6 to 16 years, with body weight from 23 to 36 kg. Thermal imaging of a carcass in combination with other methods, such as measurement of internal body temperature and analysis of post-mortem changes, enables reliable determination of the time of death of an animal, which is often of fundamental importance in veterinary forensic practice.


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